ONOS checkin based on commit tag e796610b1f721d02f9b0e213cf6f7790c10ecd60

Change-Id: Ife8810491034fe7becdba75dda20de4267bd15cd

42 files changed, 5252 insertions, 0 deletions

diff --git a/framework/src/onos/utils/stc/bin/stc b/framework/src/onos/utils/stc/bin/stc
new file mode 100755
index 00000000..23affc4a
--- /dev/null
+++ b/framework/src/onos/utils/stc/bin/stc
@@ -0,0 +1,12 @@
+#!/bin/bash
+#-------------------------------------------------------------------------------
+#   System Test Coordinator
+#-------------------------------------------------------------------------------
+
+STC_ROOT=${STC_ROOT:-$(dirname $0)/..}
+cd $STC_ROOT
+VER=1.3.0-SNAPSHOT
+
+PATH=$PWD/bin:$PATH
+
+java -jar target/onlab-stc-$VER.jar "$@"
diff --git a/framework/src/onos/utils/stc/bin/stc-launcher b/framework/src/onos/utils/stc/bin/stc-launcher
new file mode 100755
index 00000000..0d56017e
--- /dev/null
+++ b/framework/src/onos/utils/stc/bin/stc-launcher
@@ -0,0 +1,19 @@
+#!/bin/bash
+#-------------------------------------------------------------------------------
+#   System Test Coordinator process launcher
+#-------------------------------------------------------------------------------
+
+env=$1 && shift
+cwd=$1 && shift
+
+if [ $env != "-" ]; then
+    [ ! -f $env ] && echo "$env file not found" && exit 1
+    source $env
+fi
+
+if [ $cwd != "-" ]; then
+    [ ! -d $cwd ] && echo "$cwd directory not found" && exit 1
+    cd $cwd
+fi
+
+"$@" 2>&1
diff --git a/framework/src/onos/utils/stc/pom.xml b/framework/src/onos/utils/stc/pom.xml
new file mode 100644
index 00000000..a3f96430
--- /dev/null
+++ b/framework/src/onos/utils/stc/pom.xml
@@ -0,0 +1,122 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <parent>
+        <groupId>org.onosproject</groupId>
+        <artifactId>onlab-utils</artifactId>
+        <version>1.3.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
+    </parent>
+
+    <artifactId>onlab-stc</artifactId>
+    <packaging>jar</packaging>
+
+    <description>System Test Coordinator</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onlab-misc</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onlab-junit</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>commons-configuration</groupId>
+            <artifactId>commons-configuration</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>commons-collections</groupId>
+            <artifactId>commons-collections</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-databind</artifactId>
+            <version>2.4.2</version>
+            <scope>compile</scope>
+        </dependency>
+        <dependency>
+            <groupId>com.fasterxml.jackson.core</groupId>
+            <artifactId>jackson-annotations</artifactId>
+            <version>2.4.2</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>org.eclipse.jetty</groupId>
+            <artifactId>jetty-server</artifactId>
+            <version>8.1.17.v20150415</version>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.jetty</groupId>
+            <artifactId>jetty-servlet</artifactId>
+            <version>8.1.17.v20150415</version>
+        </dependency>
+        <dependency>
+            <groupId>org.eclipse.jetty</groupId>
+            <artifactId>jetty-websocket</artifactId>
+            <version>8.1.17.v20150415</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>2.3</version>
+                <configuration>
+                    <transformers>
+                        <transformer
+                                implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                            <mainClass>org.onlab.stc.Main
+                            </mainClass>
+                        </transformer>
+                    </transformers>
+                    <filters>
+                        <filter>
+                            <artifact>*:*</artifact>
+                            <excludes>
+                                <exclude>META-INF/*.SF</exclude>
+                                <exclude>META-INF/*.DSA</exclude>
+                                <exclude>META-INF/*.RSA</exclude>
+                            </excludes>
+                        </filter>
+                    </filters>
+                </configuration>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>
diff --git a/framework/src/onos/utils/stc/sample/scenario.xml b/framework/src/onos/utils/stc/sample/scenario.xml
new file mode 100644
index 00000000..8cee6319
--- /dev/null
+++ b/framework/src/onos/utils/stc/sample/scenario.xml
@@ -0,0 +1,20 @@
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<scenario name="sample" description="Sample Test Scenario">
+    <step name="alpha" exec="/bin/ls -l"/>
+    <step name="beta" exec="/bin/ls -lF"/>
+    <step name="gamma" exec="/bin/ls" requires="alpha,beta"/>
+</scenario>
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Compiler.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Compiler.java
new file mode 100644
index 00000000..c2a0c812
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Compiler.java
@@ -0,0 +1,482 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+import org.apache.commons.configuration.HierarchicalConfiguration;
+import org.onlab.graph.DepthFirstSearch;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.*;
+import static com.google.common.base.Strings.isNullOrEmpty;
+import static org.onlab.graph.DepthFirstSearch.EdgeType.BACK_EDGE;
+import static org.onlab.graph.GraphPathSearch.ALL_PATHS;
+import static org.onlab.stc.Scenario.loadScenario;
+
+/**
+ * Entity responsible for loading a scenario and producing a redy-to-execute
+ * process flow graph.
+ */
+public class Compiler {
+
+    private static final String DEFAULT_LOG_DIR = "${env.WORKSPACE}/tmp/stc/";
+
+    private static final String IMPORT = "import";
+    private static final String GROUP = "group";
+    private static final String STEP = "step";
+    private static final String PARALLEL = "parallel";
+    private static final String DEPENDENCY = "dependency";
+
+    private static final String LOG_DIR = "[@logDir]";
+    private static final String NAME = "[@name]";
+    private static final String COMMAND = "[@exec]";
+    private static final String ENV = "[@env]";
+    private static final String CWD = "[@cwd]";
+    private static final String REQUIRES = "[@requires]";
+    private static final String IF = "[@if]";
+    private static final String UNLESS = "[@unless]";
+    private static final String VAR = "[@var]";
+    private static final String FILE = "[@file]";
+    private static final String NAMESPACE = "[@namespace]";
+
+    static final String PROP_START = "${";
+    static final String PROP_END = "}";
+    private static final String HASH = "#";
+
+    private final Scenario scenario;
+
+    private final Map<String, Step> steps = Maps.newHashMap();
+    private final Map<String, Step> inactiveSteps = Maps.newHashMap();
+    private final Map<String, String> requirements = Maps.newHashMap();
+    private final Set<Dependency> dependencies = Sets.newHashSet();
+    private final List<Integer> parallels = Lists.newArrayList();
+
+    private ProcessFlow processFlow;
+    private File logDir;
+
+    private String previous = null;
+    private String pfx = "";
+    private boolean debugOn = System.getenv("debug") != null;
+
+    /**
+     * Creates a new compiler for the specified scenario.
+     *
+     * @param scenario scenario to be compiled
+     */
+    public Compiler(Scenario scenario) {
+        this.scenario = scenario;
+    }
+
+    /**
+     * Returns the scenario being compiled.
+     *
+     * @return test scenario
+     */
+    public Scenario scenario() {
+        return scenario;
+    }
+
+    /**
+     * Compiles the specified scenario to produce a final process flow graph.
+     */
+    public void compile() {
+        compile(scenario.definition(), null, null);
+        compileRequirements();
+
+        // Produce the process flow
+        processFlow = new ProcessFlow(ImmutableSet.copyOf(steps.values()),
+                                      ImmutableSet.copyOf(dependencies));
+
+        scanForCycles();
+
+        // Extract the log directory if there was one specified
+        String defaultPath = DEFAULT_LOG_DIR + scenario.name();
+        String path = scenario.definition().getString(LOG_DIR, defaultPath);
+        logDir = new File(expand(path));
+    }
+
+    /**
+     * Returns the step with the specified name.
+     *
+     * @param name step or group name
+     * @return test step or group
+     */
+    public Step getStep(String name) {
+        return steps.get(name);
+    }
+
+    /**
+     * Returns the process flow generated from this scenario definition.
+     *
+     * @return process flow as a graph
+     */
+    public ProcessFlow processFlow() {
+        return processFlow;
+    }
+
+    /**
+     * Returns the log directory where scenario logs should be kept.
+     *
+     * @return scenario logs directory
+     */
+    public File logDir() {
+        return logDir;
+    }
+
+    /**
+     * Recursively elaborates this definition to produce a final process flow graph.
+     *
+     * @param cfg         hierarchical definition
+     * @param namespace   optional namespace
+     * @param parentGroup optional parent group
+     */
+    private void compile(HierarchicalConfiguration cfg,
+                         String namespace, Group parentGroup) {
+        String opfx = pfx;
+        pfx = pfx + ">";
+        print("pfx=%s namespace=%s", pfx, namespace);
+
+        // Scan all imports
+        cfg.configurationsAt(IMPORT)
+                .forEach(c -> processImport(c, namespace, parentGroup));
+
+        // Scan all steps
+        cfg.configurationsAt(STEP)
+                .forEach(c -> processStep(c, namespace, parentGroup));
+
+        // Scan all groups
+        cfg.configurationsAt(GROUP)
+                .forEach(c -> processGroup(c, namespace, parentGroup));
+
+        // Scan all parallel groups
+        cfg.configurationsAt(PARALLEL)
+                .forEach(c -> processParallelGroup(c, namespace, parentGroup));
+
+        // Scan all dependencies
+        cfg.configurationsAt(DEPENDENCY)
+                .forEach(c -> processDependency(c, namespace));
+
+        pfx = opfx;
+    }
+
+    /**
+     * Compiles requirements for all steps and groups accrued during the
+     * overall compilation process.
+     */
+    private void compileRequirements() {
+        requirements.forEach((name, requires) ->
+                                     compileRequirements(getStep(name), requires));
+    }
+
+    private void compileRequirements(Step src, String requires) {
+        split(requires).forEach(n -> {
+            boolean isSoft = n.startsWith("~");
+            String name = n.replaceFirst("^~", "");
+            Step dst = getStep(name);
+            if (dst != null) {
+                dependencies.add(new Dependency(src, dst, isSoft));
+            }
+        });
+    }
+
+    /**
+     * Processes an import directive.
+     *
+     * @param cfg         hierarchical definition
+     * @param namespace   optional namespace
+     * @param parentGroup optional parent group
+     */
+    private void processImport(HierarchicalConfiguration cfg,
+                               String namespace, Group parentGroup) {
+        String file = checkNotNull(expand(cfg.getString(FILE)),
+                                   "Import directive must specify 'file'");
+        String newNamespace = expand(prefix(cfg.getString(NAMESPACE), namespace));
+        print("import file=%s namespace=%s", file, newNamespace);
+        try {
+            Scenario importScenario = loadScenario(new FileInputStream(file));
+            compile(importScenario.definition(), newNamespace, parentGroup);
+        } catch (IOException e) {
+            throw new IllegalArgumentException("Unable to import scenario", e);
+        }
+    }
+
+    /**
+     * Processes a step directive.
+     *
+     * @param cfg         hierarchical definition
+     * @param namespace   optional namespace
+     * @param parentGroup optional parent group
+     */
+    private void processStep(HierarchicalConfiguration cfg,
+                             String namespace, Group parentGroup) {
+        String name = expand(prefix(cfg.getString(NAME), namespace));
+        String command = expand(cfg.getString(COMMAND, parentGroup != null ? parentGroup.command() : null), true);
+        String env = expand(cfg.getString(ENV, parentGroup != null ? parentGroup.env() : null));
+        String cwd = expand(cfg.getString(CWD, parentGroup != null ? parentGroup.cwd() : null));
+
+        print("step name=%s command=%s env=%s cwd=%s", name, command, env, cwd);
+        Step step = new Step(name, command, env, cwd, parentGroup);
+        registerStep(step, cfg, namespace, parentGroup);
+    }
+
+    /**
+     * Processes a group directive.
+     *
+     * @param cfg         hierarchical definition
+     * @param namespace   optional namespace
+     * @param parentGroup optional parent group
+     */
+    private void processGroup(HierarchicalConfiguration cfg,
+                              String namespace, Group parentGroup) {
+        String name = expand(prefix(cfg.getString(NAME), namespace));
+        String command = expand(cfg.getString(COMMAND, parentGroup != null ? parentGroup.command() : null), true);
+        String env = expand(cfg.getString(ENV, parentGroup != null ? parentGroup.env() : null));
+        String cwd = expand(cfg.getString(CWD, parentGroup != null ? parentGroup.cwd() : null));
+
+        print("group name=%s command=%s env=%s cwd=%s", name, command, env, cwd);
+        Group group = new Group(name, command, env, cwd, parentGroup);
+        if (registerStep(group, cfg, namespace, parentGroup)) {
+            compile(cfg, namespace, group);
+        }
+    }
+
+    /**
+     * Registers the specified step or group.
+     *
+     * @param step        step or group
+     * @param cfg         hierarchical definition
+     * @param namespace   optional namespace
+     * @param parentGroup optional parent group
+     * @return true of the step or group was registered as active
+     */
+    private boolean registerStep(Step step, HierarchicalConfiguration cfg,
+                                 String namespace, Group parentGroup) {
+        checkState(!steps.containsKey(step.name()), "Step %s already exists", step.name());
+        String ifClause = expand(cfg.getString(IF));
+        String unlessClause = expand(cfg.getString(UNLESS));
+
+        if ((ifClause != null && ifClause.length() == 0) ||
+                (unlessClause != null && unlessClause.length() > 0) ||
+                (parentGroup != null && inactiveSteps.containsValue(parentGroup))) {
+            inactiveSteps.put(step.name(), step);
+            return false;
+        }
+
+        if (parentGroup != null) {
+            parentGroup.addChild(step);
+        }
+
+        steps.put(step.name(), step);
+        processRequirements(step, expand(cfg.getString(REQUIRES)), namespace);
+        previous = step.name();
+        return true;
+    }
+
+    /**
+     * Processes a parallel clone group directive.
+     *
+     * @param cfg         hierarchical definition
+     * @param namespace   optional namespace
+     * @param parentGroup optional parent group
+     */
+    private void processParallelGroup(HierarchicalConfiguration cfg,
+                                      String namespace, Group parentGroup) {
+        String var = cfg.getString(VAR);
+        print("parallel var=%s", var);
+
+        int i = 1;
+        while (condition(var, i).length() > 0) {
+            parallels.add(0, i);
+            compile(cfg, namespace, parentGroup);
+            parallels.remove(0);
+            i++;
+        }
+    }
+
+    /**
+     * Returns the elaborated repetition construct conditional.
+     *
+     * @param var repetition var property
+     * @param i   index to elaborate
+     * @return elaborated string
+     */
+    private String condition(String var, Integer i) {
+        return expand(var.replaceFirst("#", i.toString())).trim();
+    }
+
+    /**
+     * Processes a dependency directive.
+     *
+     * @param cfg       hierarchical definition
+     * @param namespace optional namespace
+     */
+    private void processDependency(HierarchicalConfiguration cfg, String namespace) {
+        String name = expand(prefix(cfg.getString(NAME), namespace));
+        String requires = expand(cfg.getString(REQUIRES));
+
+        print("dependency name=%s requires=%s", name, requires);
+        Step step = getStep(name, namespace);
+        if (!inactiveSteps.containsValue(step)) {
+            processRequirements(step, requires, namespace);
+        }
+    }
+
+    /**
+     * Processes the specified requiremenst string and adds dependency for
+     * each requirement of the given step.
+     *
+     * @param src       source step
+     * @param requires  comma-separated list of required steps
+     * @param namespace optional namespace
+     */
+    private void processRequirements(Step src, String requires, String namespace) {
+        String reqs = requirements.get(src.name());
+        for (String n : split(requires)) {
+            boolean isSoft = n.startsWith("~");
+            String name = n.replaceFirst("^~", "");
+            name = previous != null && name.equals("^") ? previous : name;
+            name = (isSoft ? "~" : "") + expand(prefix(name, namespace));
+            reqs = reqs == null ? name : (reqs + "," + name);
+        }
+        requirements.put(src.name(), reqs);
+    }
+
+    /**
+     * Retrieves the step or group with the specified name.
+     *
+     * @param name      step or group name
+     * @param namespace optional namespace
+     * @return step or group; null if none found in active or inactive steps
+     */
+    private Step getStep(String name, String namespace) {
+        String dName = prefix(name, namespace);
+        Step step = steps.get(dName);
+        step = step != null ? step : inactiveSteps.get(dName);
+        checkArgument(step != null, "Unknown step %s", dName);
+        return step;
+    }
+
+    /**
+     * Prefixes the specified name with the given namespace.
+     *
+     * @param name      name of a step or a group
+     * @param namespace optional namespace
+     * @return composite name
+     */
+    private String prefix(String name, String namespace) {
+        return isNullOrEmpty(namespace) ? name : namespace + "." + name;
+    }
+
+    /**
+     * Expands any environment variables in the specified string. These are
+     * specified as ${property} tokens.
+     *
+     * @param string     string to be processed
+     * @param keepTokens true if the original unresolved tokens should be kept
+     * @return original string with expanded substitutions
+     */
+    private String expand(String string, boolean... keepTokens) {
+        if (string == null) {
+            return null;
+        }
+
+        String pString = string;
+        StringBuilder sb = new StringBuilder();
+        int start, end, last = 0;
+        while ((start = pString.indexOf(PROP_START, last)) >= 0) {
+            end = pString.indexOf(PROP_END, start + PROP_START.length());
+            checkArgument(end > start, "Malformed property in %s", pString);
+            sb.append(pString.substring(last, start));
+            String prop = pString.substring(start + PROP_START.length(), end);
+            String value;
+            if (prop.equals(HASH)) {
+                value = parallels.get(0).toString();
+            } else if (prop.endsWith(HASH)) {
+                pString = pString.replaceFirst("#}", parallels.get(0).toString() + "}");
+                last = start;
+                continue;
+            } else {
+                // Try system property first, then fall back to env. variable.
+                value = System.getProperty(prop);
+                if (value == null) {
+                    value = System.getenv(prop);
+                }
+            }
+            if (value == null && keepTokens.length == 1 && keepTokens[0]) {
+                sb.append("${").append(prop).append("}");
+            } else {
+                sb.append(value != null ? value : "");
+            }
+            last = end + 1;
+        }
+        sb.append(pString.substring(last));
+        return sb.toString().replace('\n', ' ').replace('\r', ' ');
+    }
+
+    /**
+     * Splits the comma-separated string into a list of strings.
+     *
+     * @param string string to split
+     * @return list of strings
+     */
+    private List<String> split(String string) {
+        ImmutableList.Builder<String> builder = ImmutableList.builder();
+        String[] fields = string != null ? string.split(",") : new String[0];
+        for (String field : fields) {
+            builder.add(field.trim());
+        }
+        return builder.build();
+    }
+
+    /**
+     * Scans the process flow graph for cyclic dependencies.
+     */
+    private void scanForCycles() {
+        DepthFirstSearch<Step, Dependency> dfs = new DepthFirstSearch<>();
+        // Use a brute-force method of searching paths from all vertices.
+        processFlow().getVertexes().forEach(s -> {
+            DepthFirstSearch<Step, Dependency>.SpanningTreeResult r =
+                    dfs.search(processFlow, s, null, null, ALL_PATHS);
+            r.edges().forEach((e, et) -> checkArgument(et != BACK_EDGE,
+                                                       "Process flow has a cycle involving dependency from %s to %s",
+                                                       e.src().name, e.dst().name));
+        });
+    }
+
+
+    /**
+     * Prints formatted output.
+     *
+     * @param format printf format string
+     * @param args   arguments to be printed
+     */
+    private void print(String format, Object... args) {
+        if (debugOn) {
+            System.err.println(pfx + String.format(format, args));
+        }
+    }
+
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Coordinator.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Coordinator.java
new file mode 100644
index 00000000..8e3aad5b
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Coordinator.java
@@ -0,0 +1,364 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Maps;
+import com.google.common.collect.Sets;
+
+import java.io.File;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.ExecutorService;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+import static java.util.concurrent.Executors.newFixedThreadPool;
+import static org.onlab.stc.Compiler.PROP_END;
+import static org.onlab.stc.Compiler.PROP_START;
+import static org.onlab.stc.Coordinator.Directive.*;
+import static org.onlab.stc.Coordinator.Status.*;
+
+/**
+ * Coordinates execution of a scenario process flow.
+ */
+public class Coordinator {
+
+    private static final int MAX_THREADS = 16;
+
+    private final ExecutorService executor = newFixedThreadPool(MAX_THREADS);
+
+    private final ProcessFlow processFlow;
+
+    private final StepProcessListener delegate;
+    private final CountDownLatch latch;
+    private final ScenarioStore store;
+
+    private static final Pattern PROP_ERE = Pattern.compile("^@stc ([a-zA-Z0-9_.]+)=(.*$)");
+    private final Map<String, String> properties = Maps.newConcurrentMap();
+
+    private final Set<StepProcessListener> listeners = Sets.newConcurrentHashSet();
+    private File logDir;
+
+    /**
+     * Represents action to be taken on a test step.
+     */
+    public enum Directive {
+        NOOP, RUN, SKIP
+    }
+
+    /**
+     * Represents processor state.
+     */
+    public enum Status {
+        WAITING, IN_PROGRESS, SUCCEEDED, FAILED, SKIPPED
+    }
+
+    /**
+     * Creates a process flow coordinator.
+     *
+     * @param scenario    test scenario to coordinate
+     * @param processFlow process flow to coordinate
+     * @param logDir      scenario log directory
+     */
+    public Coordinator(Scenario scenario, ProcessFlow processFlow, File logDir) {
+        this.processFlow = processFlow;
+        this.logDir = logDir;
+        this.store = new ScenarioStore(processFlow, logDir, scenario.name());
+        this.delegate = new Delegate();
+        this.latch = new CountDownLatch(1);
+    }
+
+    /**
+     * Resets any previously accrued status and events.
+     */
+    public void reset() {
+        store.reset();
+    }
+
+    /**
+     * Resets all previously accrued status and events for steps that lie
+     * in the range between the steps or groups whose names match the specified
+     * patterns.
+     *
+     * @param runFromPatterns list of starting step patterns
+     * @param runToPatterns   list of ending step patterns
+     */
+    public void reset(List<String> runFromPatterns, List<String> runToPatterns) {
+        List<Step> fromSteps = matchSteps(runFromPatterns);
+        List<Step> toSteps = matchSteps(runToPatterns);
+
+        // FIXME: implement this
+    }
+
+    /**
+     * Returns a list of steps that match the specified list of patterns.
+     *
+     * @param runToPatterns list of patterns
+     * @return list of steps with matching names
+     */
+    private List<Step> matchSteps(List<String> runToPatterns) {
+        ImmutableList.Builder<Step> builder = ImmutableList.builder();
+        store.getSteps().forEach(step -> {
+            runToPatterns.forEach(p -> {
+                if (step.name().matches(p)) {
+                    builder.add(step);
+                }
+            });
+        });
+        return builder.build();
+    }
+
+    /**
+     * Starts execution of the process flow graph.
+     */
+    public void start() {
+        executeRoots(null);
+    }
+
+    /**
+     * Wants for completion of the entire process flow.
+     *
+     * @return exit code to use
+     * @throws InterruptedException if interrupted while waiting for completion
+     */
+    public int waitFor() throws InterruptedException {
+        latch.await();
+        return store.hasFailures() ? 1 : 0;
+    }
+
+    /**
+     * Returns set of all test steps.
+     *
+     * @return set of steps
+     */
+    public Set<Step> getSteps() {
+        return store.getSteps();
+    }
+
+    /**
+     * Returns a chronological list of step or group records.
+     *
+     * @return list of events
+     */
+    List<StepEvent> getRecords() {
+        return store.getEvents();
+    }
+
+    /**
+     * Returns the status record of the specified test step.
+     *
+     * @param step test step or group
+     * @return step status record
+     */
+    public Status getStatus(Step step) {
+        return store.getStatus(step);
+    }
+
+    /**
+     * Adds the specified listener.
+     *
+     * @param listener step process listener
+     */
+    public void addListener(StepProcessListener listener) {
+        listeners.add(checkNotNull(listener, "Listener cannot be null"));
+    }
+
+    /**
+     * Removes the specified listener.
+     *
+     * @param listener step process listener
+     */
+    public void removeListener(StepProcessListener listener) {
+        listeners.remove(checkNotNull(listener, "Listener cannot be null"));
+    }
+
+    /**
+     * Executes the set of roots in the scope of the specified group or globally
+     * if no group is given.
+     *
+     * @param group optional group
+     */
+    private void executeRoots(Group group) {
+        // FIXME: add ability to skip past completed steps
+        Set<Step> steps =
+                group != null ? group.children() : processFlow.getVertexes();
+        steps.forEach(step -> {
+            if (processFlow.getEdgesFrom(step).isEmpty() && step.group() == group) {
+                execute(step);
+            }
+        });
+    }
+
+    /**
+     * Executes the specified step.
+     *
+     * @param step step to execute
+     */
+    private synchronized void execute(Step step) {
+        Directive directive = nextAction(step);
+        if (directive == RUN) {
+            store.markStarted(step);
+            if (step instanceof Group) {
+                Group group = (Group) step;
+                delegate.onStart(group, null);
+                executeRoots(group);
+            } else {
+                executor.execute(new StepProcessor(step, logDir, delegate,
+                                                   substitute(step.command())));
+            }
+        } else if (directive == SKIP) {
+            if (step instanceof Group) {
+                Group group = (Group) step;
+                group.children().forEach(child -> delegate.onCompletion(child, SKIPPED));
+            }
+            delegate.onCompletion(step, SKIPPED);
+        }
+    }
+
+    /**
+     * Determines the state of the specified step.
+     *
+     * @param step test step
+     * @return state of the step process
+     */
+    private Directive nextAction(Step step) {
+        Status status = store.getStatus(step);
+        if (status != WAITING) {
+            return NOOP;
+        }
+
+        for (Dependency dependency : processFlow.getEdgesFrom(step)) {
+            Status depStatus = store.getStatus(dependency.dst());
+            if (depStatus == WAITING || depStatus == IN_PROGRESS) {
+                return NOOP;
+            } else if ((depStatus == FAILED || depStatus == SKIPPED) &&
+                    !dependency.isSoft()) {
+                return SKIP;
+            }
+        }
+        return RUN;
+    }
+
+    /**
+     * Executes the successors to the specified step.
+     *
+     * @param step step whose successors are to be executed
+     */
+    private void executeSucessors(Step step) {
+        processFlow.getEdgesTo(step).forEach(dependency -> execute(dependency.src()));
+        completeParentIfNeeded(step.group());
+    }
+
+    /**
+     * Checks whether the specified parent group, if any, should be marked
+     * as complete.
+     *
+     * @param group parent group that should be checked
+     */
+    private synchronized void completeParentIfNeeded(Group group) {
+        if (group != null && getStatus(group) == IN_PROGRESS) {
+            boolean done = true;
+            boolean failed = false;
+            for (Step child : group.children()) {
+                Status status = store.getStatus(child);
+                done = done && (status == SUCCEEDED || status == FAILED || status == SKIPPED);
+                failed = failed || status == FAILED;
+            }
+            if (done) {
+                delegate.onCompletion(group, failed ? FAILED : SUCCEEDED);
+            }
+        }
+    }
+
+    /**
+     * Expands the var references with values from the properties map.
+     *
+     * @param string string to perform substitutions on
+     */
+    private String substitute(String string) {
+        StringBuilder sb = new StringBuilder();
+        int start, end, last = 0;
+        while ((start = string.indexOf(PROP_START, last)) >= 0) {
+            end = string.indexOf(PROP_END, start + PROP_START.length());
+            checkArgument(end > start, "Malformed property in %s", string);
+            sb.append(string.substring(last, start));
+            String prop = string.substring(start + PROP_START.length(), end);
+            String value = properties.get(prop);
+            sb.append(value != null ? value : "");
+            last = end + 1;
+        }
+        sb.append(string.substring(last));
+        return sb.toString().replace('\n', ' ').replace('\r', ' ');
+    }
+
+    /**
+     * Scrapes the line of output for any variables to be captured and posted
+     * in the properties for later use.
+     *
+     * @param line line of output to scrape for property exports
+     */
+    private void scrapeForVariables(String line) {
+        Matcher matcher = PROP_ERE.matcher(line);
+        if (matcher.matches()) {
+            String prop = matcher.group(1);
+            String value = matcher.group(2);
+            properties.put(prop, value);
+        }
+    }
+
+
+    /**
+     * Prints formatted output.
+     *
+     * @param format printf format string
+     * @param args   arguments to be printed
+     */
+    public static void print(String format, Object... args) {
+        System.out.println(String.format(format, args));
+    }
+
+    /**
+     * Internal delegate to monitor the process execution.
+     */
+    private class Delegate implements StepProcessListener {
+        @Override
+        public void onStart(Step step, String command) {
+            listeners.forEach(listener -> listener.onStart(step, command));
+        }
+
+        @Override
+        public void onCompletion(Step step, Status status) {
+            store.markComplete(step, status);
+            listeners.forEach(listener -> listener.onCompletion(step, status));
+            executeSucessors(step);
+            if (store.isComplete()) {
+                latch.countDown();
+            }
+        }
+
+        @Override
+        public void onOutput(Step step, String line) {
+            scrapeForVariables(line);
+            listeners.forEach(listener -> listener.onOutput(step, line));
+        }
+    }
+
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Dependency.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Dependency.java
new file mode 100644
index 00000000..9025d2e5
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Dependency.java
@@ -0,0 +1,77 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.base.MoreObjects;
+import org.onlab.graph.AbstractEdge;
+
+import java.util.Objects;
+
+/**
+ * Representation of a dependency from one step on completion of another.
+ */
+public class Dependency extends AbstractEdge<Step> {
+
+    private boolean isSoft;
+
+    /**
+     * Creates a new edge between the specified source and destination vertexes.
+     *
+     * @param src    source vertex
+     * @param dst    destination vertex
+     * @param isSoft indicates whether this is a hard or soft dependency
+     */
+    public Dependency(Step src, Step dst, boolean isSoft) {
+        super(src, dst);
+        this.isSoft = isSoft;
+    }
+
+    /**
+     * Indicates whether this is a soft or hard dependency, i.e. one that
+     * requires successful completion of the dependency or just any completion.
+     *
+     * @return true if dependency is a soft one
+     */
+    public boolean isSoft() {
+        return isSoft;
+    }
+
+    @Override
+    public int hashCode() {
+        return 31 * super.hashCode() + Objects.hash(isSoft);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof Dependency) {
+            final Dependency other = (Dependency) obj;
+            return super.equals(other) && Objects.equals(this.isSoft, other.isSoft);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this)
+                .add("name", src().name())
+                .add("requires", dst().name())
+                .add("isSoft", isSoft)
+                .toString();
+    }
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Group.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Group.java
new file mode 100644
index 00000000..0281c364
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Group.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Sets;
+
+import java.util.Set;
+
+/**
+ * Represenation of a related group of steps.
+ */
+public class Group extends Step {
+
+    private final Set<Step> children = Sets.newHashSet();
+
+    /**
+     * Creates a new test step.
+     *
+     * @param name    group name
+     * @param command default command
+     * @param env     default path to file to be sourced into the environment
+     * @param cwd     default path to current working directory for the step
+     * @param group   optional group to which this step belongs
+     */
+    public Group(String name, String command, String env, String cwd, Group group) {
+        super(name, command, env, cwd, group);
+    }
+
+    /**
+     * Returns the set of child steps and groups contained within this group.
+     *
+     * @return set of children
+     */
+    public Set<Step> children() {
+        return ImmutableSet.copyOf(children);
+    }
+
+    /**
+     * Adds the specified step or group as a child of this group.
+     *
+     * @param child child step or group to add
+     */
+    public void addChild(Step child) {
+        children.add(child);
+    }
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Main.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Main.java
new file mode 100644
index 00000000..09b89456
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Main.java
@@ -0,0 +1,353 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.collect.ImmutableList;
+import org.eclipse.jetty.server.Server;
+import org.eclipse.jetty.servlet.ServletHandler;
+import org.eclipse.jetty.util.log.Logger;
+import org.onlab.stc.Coordinator.Status;
+
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.text.SimpleDateFormat;
+import java.util.Date;
+import java.util.List;
+import java.util.Objects;
+import java.util.Set;
+
+import static java.lang.System.currentTimeMillis;
+import static org.onlab.stc.Coordinator.Status.*;
+import static org.onlab.stc.Coordinator.print;
+
+/**
+ * Main program for executing system test coordinator.
+ */
+public final class Main {
+
+    private static final String NONE = "\u001B[0m";
+    private static final String GRAY = "\u001B[30;1m";
+    private static final String RED = "\u001B[31;1m";
+    private static final String GREEN = "\u001B[32;1m";
+    private static final String BLUE = "\u001B[36m";
+
+    private static final String SUCCESS_SUMMARY = "%sPassed! %d steps succeeded%s";
+    private static final String MIXED_SUMMARY =
+            "%s%d steps succeeded; %s%d steps failed; %s%d steps skipped%s";
+    private static final String FAILURE_SUMMARY = "%sFailed! " + MIXED_SUMMARY;
+    private static final String ABORTED_SUMMARY = "%sAborted! " + MIXED_SUMMARY;
+
+    private boolean isReported = false;
+
+    private enum Command {
+        LIST, RUN, RUN_RANGE, HELP
+    }
+
+    private final String scenarioFile;
+
+    private Command command = Command.HELP;
+    private String runFromPatterns = "";
+    private String runToPatterns = "";
+
+    private Coordinator coordinator;
+    private Monitor monitor;
+    private Listener delegate = new Listener();
+
+    private static boolean useColor = Objects.equals("true", System.getenv("stcColor"));
+
+    // usage: stc [<scenario-file>] [run]
+    // usage: stc [<scenario-file>] run [from <from-patterns>] [to <to-patterns>]]
+    // usage: stc [<scenario-file>] list
+
+    // Public construction forbidden
+    private Main(String[] args) {
+        this.scenarioFile = args[0];
+
+        if (args.length <= 1 || args.length == 2 && args[1].equals("run")) {
+            command = Command.RUN;
+        } else if (args.length == 2 && args[1].equals("list")) {
+            command = Command.LIST;
+        } else if (args.length >= 4 && args[1].equals("run")) {
+            int i = 2;
+            if (args[i].equals("from")) {
+                command = Command.RUN_RANGE;
+                runFromPatterns = args[i + 1];
+                i += 2;
+            }
+
+            if (args.length >= i + 2 && args[i].equals("to")) {
+                command = Command.RUN_RANGE;
+                runToPatterns = args[i + 1];
+            }
+        }
+    }
+
+    /**
+     * Main entry point for coordinating test scenario execution.
+     *
+     * @param args command-line arguments
+     */
+    public static void main(String[] args) {
+        Main main = new Main(args);
+        main.run();
+    }
+
+    // Runs the scenario processing
+    private void run() {
+        try {
+            // Load scenario
+            Scenario scenario = Scenario.loadScenario(new FileInputStream(scenarioFile));
+
+            // Elaborate scenario
+            Compiler compiler = new Compiler(scenario);
+            compiler.compile();
+
+            // Setup the process flow coordinator
+            coordinator = new Coordinator(scenario, compiler.processFlow(),
+                                          compiler.logDir());
+            coordinator.addListener(delegate);
+
+            // Prepare the GUI monitor
+            monitor = new Monitor(coordinator, compiler);
+            startMonitorServer(monitor);
+
+            // Execute process flow
+            processCommand();
+
+        } catch (FileNotFoundException e) {
+            print("Unable to find scenario file %s", scenarioFile);
+        }
+    }
+
+    // Initiates a web-server for the monitor GUI.
+    private static void startMonitorServer(Monitor monitor) {
+        org.eclipse.jetty.util.log.Log.setLog(new NullLogger());
+        Server server = new Server(9999);
+        ServletHandler handler = new ServletHandler();
+        server.setHandler(handler);
+        MonitorWebSocketServlet.setMonitor(monitor);
+        handler.addServletWithMapping(MonitorWebSocketServlet.class, "/*");
+        try {
+            server.start();
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    // Processes the appropriate command
+    private void processCommand() {
+        switch (command) {
+            case RUN:
+                processRun();
+                break;
+            case LIST:
+                processList();
+                break;
+            case RUN_RANGE:
+                processRunRange();
+                break;
+            default:
+                print("Unsupported command %s", command);
+        }
+    }
+
+    // Processes the scenario 'run' command.
+    private void processRun() {
+        coordinator.reset();
+        runCoordinator();
+    }
+
+    // Processes the scenario 'run' command for range of steps.
+    private void processRunRange() {
+        coordinator.reset(list(runFromPatterns), list(runToPatterns));
+        runCoordinator();
+    }
+
+    // Processes the scenario 'list' command.
+    private void processList() {
+        coordinator.getRecords()
+                .forEach(event -> logStatus(event.time(), event.name(), event.status(), event.command()));
+        System.exit(0);
+    }
+
+    // Runs the coordinator and waits for it to finish.
+    private void runCoordinator() {
+        try {
+            Runtime.getRuntime().addShutdownHook(new ShutdownHook());
+            coordinator.start();
+            int exitCode = coordinator.waitFor();
+            pause(100); // allow stdout to flush
+            printSummary(exitCode, false);
+            System.exit(exitCode);
+        } catch (InterruptedException e) {
+            print("Unable to execute scenario %s", scenarioFile);
+        }
+    }
+
+    private synchronized void printSummary(int exitCode, boolean isAborted) {
+        if (!isReported) {
+            isReported = true;
+            Set<Step> steps = coordinator.getSteps();
+            int count = steps.size();
+            if (exitCode == 0) {
+                print(SUCCESS_SUMMARY, color(SUCCEEDED), count, color(null));
+            } else {
+                long success = steps.stream().filter(s -> coordinator.getStatus(s) == SUCCEEDED).count();
+                long failed = steps.stream().filter(s -> coordinator.getStatus(s) == FAILED).count();
+                long skipped = steps.stream().filter(s -> coordinator.getStatus(s) == SKIPPED).count();
+                print(isAborted ? ABORTED_SUMMARY : FAILURE_SUMMARY,
+                      color(FAILED), color(SUCCEEDED), success,
+                      color(FAILED), failed, color(SKIPPED), skipped, color(null));
+            }
+        }
+    }
+
+    /**
+     * Internal delegate to monitor the process execution.
+     */
+    private static class Listener implements StepProcessListener {
+        @Override
+        public void onStart(Step step, String command) {
+            logStatus(currentTimeMillis(), step.name(), IN_PROGRESS, command);
+        }
+
+        @Override
+        public void onCompletion(Step step, Status status) {
+            logStatus(currentTimeMillis(), step.name(), status, null);
+        }
+
+        @Override
+        public void onOutput(Step step, String line) {
+        }
+    }
+
+    // Logs the step status.
+    private static void logStatus(long time, String name, Status status, String cmd) {
+        if (cmd != null) {
+            print("%s  %s%s %s%s -- %s", time(time), color(status), name, action(status), color(null), cmd);
+        } else {
+            print("%s  %s%s %s%s", time(time), color(status), name, action(status), color(null));
+        }
+    }
+
+    // Produces a description of event using the specified step status.
+    private static String action(Status status) {
+        return status == IN_PROGRESS ? "started" :
+                (status == SUCCEEDED ? "completed" :
+                        (status == FAILED ? "failed" :
+                                (status == SKIPPED ? "skipped" : "waiting")));
+    }
+
+    // Produces an ANSI escape code for color using the specified step status.
+    private static String color(Status status) {
+        if (!useColor) {
+            return "";
+        }
+        return status == null ? NONE :
+                (status == IN_PROGRESS ? BLUE :
+                        (status == SUCCEEDED ? GREEN :
+                                (status == FAILED ? RED : GRAY)));
+    }
+
+    // Produces a list from the specified comma-separated string.
+    private static List<String> list(String patterns) {
+        return ImmutableList.copyOf(patterns.split(","));
+    }
+
+    // Produces a formatted time stamp.
+    private static String time(long time) {
+        return new SimpleDateFormat("YYYY-MM-dd HH:mm:ss").format(new Date(time));
+    }
+
+    // Pauses for the specified number of millis.
+    private static void pause(int ms) {
+        try {
+            Thread.sleep(ms);
+        } catch (InterruptedException e) {
+            print("Interrupted!");
+        }
+    }
+
+    // Shutdown hook to report status even when aborted.
+    private class ShutdownHook extends Thread {
+        @Override
+        public void run() {
+            printSummary(1, true);
+        }
+    }
+
+    // Logger to quiet Jetty down
+    private static class NullLogger implements Logger {
+        @Override
+        public String getName() {
+            return "quiet";
+        }
+
+        @Override
+        public void warn(String msg, Object... args) {
+        }
+
+        @Override
+        public void warn(Throwable thrown) {
+        }
+
+        @Override
+        public void warn(String msg, Throwable thrown) {
+        }
+
+        @Override
+        public void info(String msg, Object... args) {
+        }
+
+        @Override
+        public void info(Throwable thrown) {
+        }
+
+        @Override
+        public void info(String msg, Throwable thrown) {
+        }
+
+        @Override
+        public boolean isDebugEnabled() {
+            return false;
+        }
+
+        @Override
+        public void setDebugEnabled(boolean enabled) {
+        }
+
+        @Override
+        public void debug(String msg, Object... args) {
+        }
+
+        @Override
+        public void debug(Throwable thrown) {
+        }
+
+        @Override
+        public void debug(String msg, Throwable thrown) {
+        }
+
+        @Override
+        public Logger getLogger(String name) {
+            return this;
+        }
+
+        @Override
+        public void ignore(Throwable ignored) {
+        }
+    }
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Monitor.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Monitor.java
new file mode 100644
index 00000000..4e6f63fa
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Monitor.java
@@ -0,0 +1,154 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ArrayNode;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.collect.Maps;
+import org.onlab.stc.MonitorLayout.Box;
+
+import java.io.FileWriter;
+import java.io.IOException;
+import java.io.PrintWriter;
+import java.util.Map;
+
+import static org.onlab.stc.Coordinator.Status.IN_PROGRESS;
+
+/**
+ * Scenario test monitor.
+ */
+public class Monitor implements StepProcessListener {
+
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    private final Coordinator coordinator;
+    private final Compiler compiler;
+    private final MonitorLayout layout;
+
+    private MonitorDelegate delegate;
+
+    private Map<Step, Box> boxes = Maps.newHashMap();
+
+    /**
+     * Creates a new shared process flow monitor.
+     *
+     * @param coordinator process flow coordinator
+     * @param compiler    scenario compiler
+     */
+    Monitor(Coordinator coordinator, Compiler compiler) {
+        this.coordinator = coordinator;
+        this.compiler = compiler;
+        this.layout = new MonitorLayout(compiler);
+        coordinator.addListener(this);
+    }
+
+    /**
+     * Sets the process monitor delegate.
+     *
+     * @param delegate process monitor delegate
+     */
+    void setDelegate(MonitorDelegate delegate) {
+        this.delegate = delegate;
+    }
+
+    /**
+     * Notifies the process monitor delegate with the specified event.
+     *
+     * @param event JSON event data
+     */
+    public void notify(ObjectNode event) {
+        if (delegate != null) {
+            delegate.notify(event);
+        }
+    }
+
+    /**
+     * Returns the scenario process flow as JSON data.
+     *
+     * @return scenario process flow data
+     */
+    ObjectNode scenarioData() {
+        ObjectNode root = mapper.createObjectNode();
+        ArrayNode steps = mapper.createArrayNode();
+        ArrayNode requirements = mapper.createArrayNode();
+
+        ProcessFlow pf = compiler.processFlow();
+        pf.getVertexes().forEach(step -> add(step, steps));
+        pf.getEdges().forEach(requirement -> add(requirement, requirements));
+
+        root.set("steps", steps);
+        root.set("requirements", requirements);
+
+        try (FileWriter fw = new FileWriter("/tmp/data.json");
+             PrintWriter pw = new PrintWriter(fw)) {
+            pw.println(root.toString());
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+        return root;
+    }
+
+
+    private void add(Step step, ArrayNode steps) {
+        Box box = layout.get(step);
+        ObjectNode sn = mapper.createObjectNode()
+                .put("name", step.name())
+                .put("isGroup", step instanceof Group)
+                .put("status", status(coordinator.getStatus(step)))
+                .put("tier", box.tier())
+                .put("depth", box.depth());
+        if (step.group() != null) {
+            sn.put("group", step.group().name());
+        }
+        steps.add(sn);
+    }
+
+    private String status(Coordinator.Status status) {
+        return status.toString().toLowerCase();
+    }
+
+    private void add(Dependency requirement, ArrayNode requirements) {
+        ObjectNode rn = mapper.createObjectNode();
+        rn.put("src", requirement.src().name())
+                .put("dst", requirement.dst().name())
+                .put("isSoft", requirement.isSoft());
+        requirements.add(rn);
+    }
+
+    @Override
+    public void onStart(Step step, String command) {
+        notify(event(step, status(IN_PROGRESS)));
+    }
+
+    @Override
+    public void onCompletion(Step step, Coordinator.Status status) {
+        notify(event(step, status(status)));
+    }
+
+    @Override
+    public void onOutput(Step step, String line) {
+
+    }
+
+    private ObjectNode event(Step step, String status) {
+        ObjectNode event = mapper.createObjectNode()
+                .put("name", step.name())
+                .put("status", status);
+        return event;
+    }
+
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorDelegate.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorDelegate.java
new file mode 100644
index 00000000..d11542a7
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorDelegate.java
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * Delegate to which monitor can send notifications.
+ */
+public interface MonitorDelegate {
+
+    /**
+     * Issues JSON event to be sent to any connected monitor clients.
+     *
+     * @param event JSON event data
+     */
+    void notify(ObjectNode event);
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorLayout.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorLayout.java
new file mode 100644
index 00000000..1c0e7313
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorLayout.java
@@ -0,0 +1,307 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+import java.util.stream.IntStream;
+
+/**
+ * Computes scenario process flow layout for the Monitor GUI.
+ */
+public class MonitorLayout {
+
+    public static final int WIDTH = 210;
+    public static final int HEIGHT = 30;
+    public static final int W_GAP = 40;
+    public static final int H_GAP = 50;
+    public static final int SLOT_WIDTH = WIDTH + H_GAP;
+
+    private final Compiler compiler;
+    private final ProcessFlow flow;
+
+    private Map<Step, Box> boxes = Maps.newHashMap();
+
+    /**
+     * Creates a new shared process flow monitor.
+     *
+     * @param compiler scenario compiler
+     */
+    MonitorLayout(Compiler compiler) {
+        this.compiler = compiler;
+        this.flow = compiler.processFlow();
+
+        // Extract the flow and create initial bounding boxes.
+        boxes.put(null, new Box(null, 0));
+        flow.getVertexes().forEach(this::createBox);
+
+        computeLayout(null, 0, 1);
+    }
+
+    // Computes the graph layout giving preference to group associations.
+    private void computeLayout(Group group, int absoluteTier, int tier) {
+        Box box = boxes.get(group);
+
+        // Find all children of the group, or items with no group if at top.
+        Set<Step> children = group != null ? group.children() :
+                flow.getVertexes().stream().filter(s -> s.group() == null)
+                        .collect(Collectors.toSet());
+
+        children.forEach(s -> visit(s, absoluteTier, 1, group));
+
+        // Figure out what the group root vertexes are.
+        Set<Step> roots = findRoots(group);
+
+        // Compute the boxes for each of the roots.
+        roots.forEach(s -> updateBox(s, absoluteTier + 1, 1, group));
+
+        // Update the tier and depth of the group bounding box.
+        computeTiersAndDepth(group, box, absoluteTier, tier, children);
+
+        // Compute the minimum breadth of this group's bounding box.
+        computeBreadth(group, box, children);
+
+        // Compute child placements
+        computeChildPlacements(group, box, children);
+    }
+
+    // Updates the box for the specified step, given the tier number, which
+    // is relative to the parent.
+    private Box updateBox(Step step, int absoluteTier, int tier, Group group) {
+        Box box = boxes.get(step);
+        if (step instanceof Group) {
+            computeLayout((Group) step, absoluteTier, tier);
+        } else {
+            box.setTierAndDepth(absoluteTier, tier, 1, group);
+        }
+
+        // Follow the steps downstream of this one.
+        follow(step, absoluteTier + box.depth(), box.tier() + box.depth());
+        return box;
+    }
+
+    // Backwards follows edges leading towards the specified step to visit
+    // the source vertex and compute layout of those vertices that had
+    // sufficient number of visits to compute their tier.
+    private void follow(Step step, int absoluteTier, int tier) {
+        Group from = step.group();
+        flow.getEdgesTo(step).stream()
+                .filter(d -> visit(d.src(), absoluteTier, tier, from))
+                .forEach(d -> updateBox(d.src(), absoluteTier, tier, from));
+    }
+
+    // Visits each step, records maximum tier and returns true if this
+    // was the last expected visit.
+    private boolean visit(Step step, int absoluteTier, int tier, Group from) {
+        Box box = boxes.get(step);
+        return box.visitAndLatchMaxTier(absoluteTier, tier, from);
+    }
+
+    // Computes the absolute and relative tiers and the depth of the group
+    // bounding box.
+    private void computeTiersAndDepth(Group group, Box box,
+                                      int absoluteTier, int tier, Set<Step> children) {
+        int depth = children.stream().mapToInt(this::bottomMostTier).max().getAsInt();
+        box.setTierAndDepth(absoluteTier, tier, depth, group);
+    }
+
+    // Returns the bottom-most tier this step occupies relative to its parent.
+    private int bottomMostTier(Step step) {
+        Box box = boxes.get(step);
+        return box.tier() + box.depth();
+    }
+
+    // Computes breadth of the specified group.
+    private void computeBreadth(Group group, Box box, Set<Step> children) {
+        if (box.breadth() == 0) {
+            // Scan through all tiers and determine the maximum breadth of each.
+            IntStream.range(1, box.depth)
+                    .forEach(t -> computeTierBreadth(t, box, children));
+            box.latchBreadth(children.stream()
+                                     .mapToInt(s -> boxes.get(s).breadth())
+                                     .max().getAsInt());
+        }
+    }
+
+    // Computes tier width.
+    private void computeTierBreadth(int t, Box box, Set<Step> children) {
+        box.latchBreadth(children.stream().map(boxes::get)
+                                 .filter(b -> isSpanningTier(b, t))
+                                 .mapToInt(Box::breadth).sum());
+    }
+
+    // Computes the actual child box placements relative to the parent using
+    // the previously established tier, depth and breadth attributes.
+    private void computeChildPlacements(Group group, Box box,
+                                        Set<Step> children) {
+        // Order the root-nodes in alphanumeric order first.
+        List<Box> tierBoxes = Lists.newArrayList(boxesOnTier(1, children));
+        tierBoxes.sort((a, b) -> a.step().name().compareTo(b.step().name()));
+
+        // Place the boxes centered on the parent box; left to right.
+        int tierBreadth = tierBoxes.stream().mapToInt(Box::breadth).sum();
+        int slot = 1;
+        for (Box b : tierBoxes) {
+            b.updateCenter(1, slot(slot, tierBreadth));
+            slot += b.breadth();
+        }
+    }
+
+    // Returns the horizontal offset off the parent center.
+    private int slot(int slot, int tierBreadth) {
+        boolean even = tierBreadth % 2 == 0;
+        int multiplier = -tierBreadth / 2 + slot - 1;
+        return even ? multiplier * SLOT_WIDTH + SLOT_WIDTH / 2 : multiplier * SLOT_WIDTH;
+    }
+
+    // Returns a list of all child step boxes that start on the specified tier.
+    private List<Box> boxesOnTier(int tier, Set<Step> children) {
+        return boxes.values().stream()
+                .filter(b -> b.tier() == tier && children.contains(b.step()))
+                .collect(Collectors.toList());
+    }
+
+    // Determines whether the specified box spans, or occupies a tier.
+    private boolean isSpanningTier(Box b, int tier) {
+        return (b.depth() == 1 && b.tier() == tier) ||
+                (b.tier() <= tier && tier < b.tier() + b.depth());
+    }
+
+
+    // Determines roots of the specified group or of the entire graph.
+    private Set<Step> findRoots(Group group) {
+        Set<Step> steps = group != null ? group.children() : flow.getVertexes();
+        return steps.stream().filter(s -> isRoot(s, group)).collect(Collectors.toSet());
+    }
+
+    private boolean isRoot(Step step, Group group) {
+        if (step.group() != group) {
+            return false;
+        }
+
+        Set<Dependency> requirements = flow.getEdgesFrom(step);
+        return requirements.stream().filter(r -> r.dst().group() == group)
+                .collect(Collectors.toSet()).isEmpty();
+    }
+
+    /**
+     * Returns the bounding box for the specified step. If null is given, it
+     * returns the overall bounding box.
+     *
+     * @param step step or group; null for the overall bounding box
+     * @return bounding box
+     */
+    public Box get(Step step) {
+        return boxes.get(step);
+    }
+
+    /**
+     * Returns the bounding box for the specified step name. If null is given,
+     * it returns the overall bounding box.
+     *
+     * @param name name of step or group; null for the overall bounding box
+     * @return bounding box
+     */
+    public Box get(String name) {
+        return get(name == null ? null : compiler.getStep(name));
+    }
+
+    // Creates a bounding box for the specified step or group.
+    private void createBox(Step step) {
+        boxes.put(step, new Box(step, flow.getEdgesFrom(step).size()));
+    }
+
+    /**
+     * Bounding box data for a step or group.
+     */
+    final class Box {
+
+        private Step step;
+        private int remainingRequirements;
+
+        private int absoluteTier = 0;
+        private int tier;
+        private int depth = 1;
+        private int breadth;
+        private int center, top;
+
+        private Box(Step step, int remainingRequirements) {
+            this.step = step;
+            this.remainingRequirements = remainingRequirements + 1;
+            breadth = step == null || step instanceof Group ? 0 : 1;
+        }
+
+        private void latchTiers(int absoluteTier, int tier, Group from) {
+            this.absoluteTier = Math.max(this.absoluteTier, absoluteTier);
+            if (step == null || step.group() == from) {
+                this.tier = Math.max(this.tier, tier);
+            }
+        }
+
+        public void latchBreadth(int breadth) {
+            this.breadth = Math.max(this.breadth, breadth);
+        }
+
+        void setTierAndDepth(int absoluteTier, int tier, int depth, Group from) {
+            latchTiers(absoluteTier, tier, from);
+            this.depth = depth;
+        }
+
+        boolean visitAndLatchMaxTier(int absoluteTier, int tier, Group from) {
+            latchTiers(absoluteTier, tier, from);
+            --remainingRequirements;
+            return remainingRequirements == 0;
+        }
+
+        Step step() {
+            return step;
+        }
+
+        public int absoluteTier() {
+            return absoluteTier;
+        }
+
+        int tier() {
+            return tier;
+        }
+
+        int depth() {
+            return depth;
+        }
+
+        int breadth() {
+            return breadth;
+        }
+
+        int top() {
+            return top;
+        }
+
+        int center() {
+            return center;
+        }
+
+        public void updateCenter(int top, int center) {
+            this.top = top;
+            this.center = center;
+        }
+    }
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorWebSocket.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorWebSocket.java
new file mode 100644
index 00000000..cd146070
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorWebSocket.java
@@ -0,0 +1,149 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.eclipse.jetty.websocket.WebSocket;
+
+import java.io.IOException;
+
+import static org.onlab.stc.Coordinator.print;
+
+/**
+ * Web socket capable of interacting with the STC monitor GUI.
+ */
+public class MonitorWebSocket implements WebSocket.OnTextMessage, WebSocket.OnControl {
+
+    private static final long MAX_AGE_MS = 30_000;
+
+    private static final byte PING = 0x9;
+    private static final byte PONG = 0xA;
+    private static final byte[] PING_DATA = new byte[]{(byte) 0xde, (byte) 0xad};
+
+    private final Monitor monitor;
+
+    private Connection connection;
+    private FrameConnection control;
+
+    private final ObjectMapper mapper = new ObjectMapper();
+
+    private long lastActive = System.currentTimeMillis();
+
+    /**
+     * Creates a new monitor client GUI web-socket.
+     *
+     * @param monitor shared process flow monitor
+     */
+    MonitorWebSocket(Monitor monitor) {
+        this.monitor = monitor;
+    }
+
+    /**
+     * Issues a close on the connection.
+     */
+    synchronized void close() {
+        destroyHandlers();
+        if (connection.isOpen()) {
+            connection.close();
+        }
+    }
+
+    /**
+     * Indicates if this connection is idle.
+     *
+     * @return true if idle or closed
+     */
+    synchronized boolean isIdle() {
+        long quietFor = System.currentTimeMillis() - lastActive;
+        boolean idle = quietFor > MAX_AGE_MS;
+        if (idle || (connection != null && !connection.isOpen())) {
+            return true;
+        } else if (connection != null) {
+            try {
+                control.sendControl(PING, PING_DATA, 0, PING_DATA.length);
+            } catch (IOException e) {
+                print("Unable to send ping message due to: %s", e);
+            }
+        }
+        return false;
+    }
+
+    @Override
+    public void onOpen(Connection connection) {
+        this.connection = connection;
+        this.control = (FrameConnection) connection;
+        try {
+            createHandlers();
+            sendMessage(message("flow", monitor.scenarioData()));
+
+        } catch (Exception e) {
+            print("Unable to open monitor connection: %s", e);
+            this.connection.close();
+            this.connection = null;
+            this.control = null;
+        }
+    }
+
+    @Override
+    public synchronized void onClose(int closeCode, String message) {
+        destroyHandlers();
+    }
+
+    @Override
+    public boolean onControl(byte controlCode, byte[] data, int offset, int length) {
+        lastActive = System.currentTimeMillis();
+        return true;
+    }
+
+    @Override
+    public void onMessage(String data) {
+        lastActive = System.currentTimeMillis();
+        try {
+            ObjectNode message = (ObjectNode) mapper.reader().readTree(data);
+            // TODO:
+            print("Got message: %s", message);
+        } catch (Exception e) {
+            print("Unable to parse GUI message %s due to %s", data, e);
+        }
+    }
+
+    public synchronized void sendMessage(ObjectNode message) {
+        try {
+            if (connection.isOpen()) {
+                connection.sendMessage(message.toString());
+            }
+        } catch (IOException e) {
+            print("Unable to send message %s to GUI due to %s", message, e);
+        }
+    }
+
+    public ObjectNode message(String type, ObjectNode payload) {
+        ObjectNode message = mapper.createObjectNode().put("event", type);
+        message.set("payload", payload);
+        return message;
+    }
+
+    // Creates new message handlers.
+    private synchronized void createHandlers() {
+    }
+
+    // Destroys message handlers.
+    private synchronized void destroyHandlers() {
+    }
+
+}
+
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorWebSocketServlet.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorWebSocketServlet.java
new file mode 100644
index 00000000..a8705003
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/MonitorWebSocketServlet.java
@@ -0,0 +1,137 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import com.google.common.io.ByteStreams;
+import com.google.common.net.MediaType;
+import org.eclipse.jetty.websocket.WebSocket;
+import org.eclipse.jetty.websocket.WebSocketServlet;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+import java.io.InputStream;
+import java.util.HashSet;
+import java.util.Iterator;
+import java.util.Set;
+import java.util.Timer;
+import java.util.TimerTask;
+
+/**
+ * Web socket servlet capable of creating web sockets for the STC monitor.
+ */
+public class MonitorWebSocketServlet extends WebSocketServlet
+        implements MonitorDelegate {
+
+    private static final long PING_DELAY_MS = 5000;
+    private static final String DOT = ".";
+
+    private static Monitor monitor;
+    private static MonitorWebSocketServlet instance;
+
+    private final Set<MonitorWebSocket> sockets = new HashSet<>();
+    private final Timer timer = new Timer();
+    private final TimerTask pruner = new Pruner();
+
+    /**
+     * Binds the shared process flow monitor.
+     *
+     * @param m process monitor reference
+     */
+    public static void setMonitor(Monitor m) {
+        monitor = m;
+    }
+
+    /**
+     * Closes all currently open monitor web-sockets.
+     */
+    public static void closeAll() {
+        if (instance != null) {
+            instance.sockets.forEach(MonitorWebSocket::close);
+            instance.sockets.clear();
+        }
+    }
+
+    @Override
+    public void init() throws ServletException {
+        super.init();
+        instance = this;
+        monitor.setDelegate(this);
+        timer.schedule(pruner, PING_DELAY_MS, PING_DELAY_MS);
+    }
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        String uri = req.getRequestURI();
+        uri = uri.length() <= 1 ? "/index.html" : uri;
+        InputStream resource = getClass().getResourceAsStream(uri);
+        if (resource == null) {
+            resp.setStatus(HttpServletResponse.SC_NOT_FOUND);
+        } else {
+            byte[] entity = ByteStreams.toByteArray(resource);
+            resp.setStatus(HttpServletResponse.SC_OK);
+            resp.setContentType(contentType(uri).toString());
+            resp.setContentLength(entity.length);
+            resp.getOutputStream().write(entity);
+        }
+    }
+
+    private MediaType contentType(String uri) {
+        int sep = uri.lastIndexOf(DOT);
+        String ext = sep > 0 ? uri.substring(sep + 1) : null;
+        return ext == null ? MediaType.APPLICATION_BINARY :
+                ext.equals("html") ? MediaType.HTML_UTF_8 :
+                        ext.equals("js") ? MediaType.JAVASCRIPT_UTF_8 :
+                                ext.equals("css") ? MediaType.CSS_UTF_8 :
+                                        MediaType.APPLICATION_BINARY;
+    }
+
+    @Override
+    public WebSocket doWebSocketConnect(HttpServletRequest request, String protocol) {
+        MonitorWebSocket socket = new MonitorWebSocket(monitor);
+        synchronized (sockets) {
+            sockets.add(socket);
+        }
+        return socket;
+    }
+
+    @Override
+    public void notify(ObjectNode event) {
+        if (instance != null) {
+            instance.sockets.forEach(ws -> ws.sendMessage(event));
+        }
+    }
+
+    // Task for pruning web-sockets that are idle.
+    private class Pruner extends TimerTask {
+        @Override
+        public void run() {
+            synchronized (sockets) {
+                Iterator<MonitorWebSocket> it = sockets.iterator();
+                while (it.hasNext()) {
+                    MonitorWebSocket socket = it.next();
+                    if (socket.isIdle()) {
+                        it.remove();
+                        socket.close();
+                    }
+                }
+            }
+        }
+    }
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/ProcessFlow.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/ProcessFlow.java
new file mode 100644
index 00000000..4d99b339
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/ProcessFlow.java
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import org.onlab.graph.MutableAdjacencyListsGraph;
+
+import java.util.Set;
+
+/**
+ * Graph representation of a test process flow.
+ */
+public class ProcessFlow extends MutableAdjacencyListsGraph<Step, Dependency> {
+
+    /**
+     * Creates a graph comprising of the specified vertexes and edges.
+     *
+     * @param vertexes set of graph vertexes
+     * @param edges    set of graph edges
+     */
+    public ProcessFlow(Set<Step> vertexes, Set<Dependency> edges) {
+        super(vertexes, edges);
+    }
+
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Scenario.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Scenario.java
new file mode 100644
index 00000000..fd2cd62d
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Scenario.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import org.apache.commons.configuration.ConfigurationException;
+import org.apache.commons.configuration.HierarchicalConfiguration;
+import org.apache.commons.configuration.XMLConfiguration;
+
+import java.io.InputStream;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static com.google.common.base.Preconditions.checkState;
+
+/**
+ * Representation of a re-usable test scenario.
+ */
+public final class Scenario {
+
+    private static final String SCENARIO = "scenario";
+    private static final String NAME = "[@name]";
+    private static final String DESCRIPTION = "[@description]";
+
+    private final String name;
+    private final String description;
+    private final HierarchicalConfiguration definition;
+
+    // Creates a new scenario from the specified definition.
+    private Scenario(String name, String description, HierarchicalConfiguration definition) {
+        this.name = checkNotNull(name, "Name cannot be null");
+        this.description = checkNotNull(description, "Description cannot be null");
+        this.definition = checkNotNull(definition, "Definition cannot be null");
+    }
+
+    /**
+     * Loads a new scenario from the specified hierarchical configuration.
+     *
+     * @param definition scenario definition
+     * @return loaded scenario
+     */
+    public static Scenario loadScenario(HierarchicalConfiguration definition) {
+        String name = definition.getString(NAME);
+        String description = definition.getString(DESCRIPTION, "");
+        checkState(name != null, "Scenario name must be specified");
+        return new Scenario(name, description, definition);
+    }
+
+    /**
+     * Loads a new scenario from the specified input stream.
+     *
+     * @param stream scenario definition stream
+     * @return loaded scenario
+     */
+    public static Scenario loadScenario(InputStream stream) {
+        XMLConfiguration cfg = new XMLConfiguration();
+        cfg.setAttributeSplittingDisabled(true);
+        cfg.setDelimiterParsingDisabled(true);
+        cfg.setRootElementName(SCENARIO);
+        try {
+            cfg.load(stream);
+            return loadScenario(cfg);
+        } catch (ConfigurationException e) {
+            throw new IllegalArgumentException("Unable to load scenario from the stream", e);
+        }
+    }
+
+    /**
+     * Returns the scenario name.
+     *
+     * @return scenario name
+     */
+    public String name() {
+        return name;
+    }
+
+    /**
+     * Returns the scenario description.
+     *
+     * @return scenario description
+     */
+    public String description() {
+        return description;
+    }
+
+    /**
+     * Returns the scenario definition.
+     *
+     * @return scenario definition
+     */
+    public HierarchicalConfiguration definition() {
+        return definition;
+    }
+
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/ScenarioStore.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/ScenarioStore.java
new file mode 100644
index 00000000..d37222b1
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/ScenarioStore.java
@@ -0,0 +1,201 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.Lists;
+import com.google.common.collect.Maps;
+import org.apache.commons.configuration.ConfigurationException;
+import org.apache.commons.configuration.PropertiesConfiguration;
+import org.onlab.stc.Coordinator.Status;
+
+import java.io.File;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onlab.stc.Coordinator.Status.*;
+import static org.onlab.stc.Coordinator.print;
+
+/**
+ * Maintains state of scenario execution.
+ */
+class ScenarioStore {
+
+    private final ProcessFlow processFlow;
+    private final File storeFile;
+    private final File logDir;
+
+    private final List<StepEvent> events = Lists.newArrayList();
+    private final Map<String, Status> statusMap = Maps.newConcurrentMap();
+
+    /**
+     * Creates a new scenario store for the specified process flow.
+     *
+     * @param processFlow scenario process flow
+     * @param logDir      scenario log directory
+     * @param name        scenario name
+     */
+    ScenarioStore(ProcessFlow processFlow, File logDir, String name) {
+        this.processFlow = processFlow;
+        this.logDir = logDir;
+        this.storeFile = new File(logDir, name + ".stc");
+        load();
+    }
+
+    /**
+     * Resets status of all steps to waiting and clears all events.
+     */
+    void reset() {
+        events.clear();
+        statusMap.clear();
+        processFlow.getVertexes().forEach(step -> statusMap.put(step.name(), WAITING));
+        try {
+            removeLogs();
+            PropertiesConfiguration cfg = new PropertiesConfiguration(storeFile);
+            cfg.clear();
+            cfg.save();
+        } catch (ConfigurationException e) {
+            print("Unable to store file %s", storeFile);
+        }
+
+    }
+
+    /**
+     * Returns set of all test steps.
+     *
+     * @return set of steps
+     */
+    Set<Step> getSteps() {
+        return processFlow.getVertexes();
+    }
+
+    /**
+     * Returns a chronological list of step or group records.
+     *
+     * @return list of events
+     */
+    synchronized List<StepEvent> getEvents() {
+        return ImmutableList.copyOf(events);
+    }
+
+    /**
+     * Returns the status record of the specified test step.
+     *
+     * @param step test step or group
+     * @return step status record
+     */
+    Status getStatus(Step step) {
+        return checkNotNull(statusMap.get(step.name()), "Step %s not found", step.name());
+    }
+
+    /**
+     * Marks the specified test step as being in progress.
+     *
+     * @param step test step or group
+     */
+    synchronized void markStarted(Step step) {
+        add(new StepEvent(step.name(), IN_PROGRESS, step.command()));
+        save();
+    }
+
+    /**
+     * Marks the specified test step as being complete.
+     *
+     * @param step   test step or group
+     * @param status new step status
+     */
+    synchronized void markComplete(Step step, Status status) {
+        add(new StepEvent(step.name(), status, null));
+        save();
+    }
+
+    /**
+     * Returns true if all steps in the store have been marked as completed
+     * regardless of the completion status.
+     *
+     * @return true if all steps completed one way or another
+     */
+    synchronized boolean isComplete() {
+        return !statusMap.values().stream().anyMatch(s -> s == WAITING || s == IN_PROGRESS);
+    }
+
+    /**
+     * Indicates whether there are any failures.
+     *
+     * @return true if there are failed steps
+     */
+    boolean hasFailures() {
+        for (Status status : statusMap.values()) {
+            if (status == FAILED) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Registers a new step record.
+     *
+     * @param event step event
+     */
+    private synchronized void add(StepEvent event) {
+        events.add(event);
+        statusMap.put(event.name(), event.status());
+    }
+
+    /**
+     * Loads the states from disk.
+     */
+    private void load() {
+        try {
+            PropertiesConfiguration cfg = new PropertiesConfiguration(storeFile);
+            cfg.getKeys().forEachRemaining(prop -> add(StepEvent.fromString(cfg.getString(prop))));
+            cfg.save();
+        } catch (ConfigurationException e) {
+            print("Unable to load file %s", storeFile);
+        }
+    }
+
+    /**
+     * Saves the states to disk.
+     */
+    private void save() {
+        try {
+            PropertiesConfiguration cfg = new PropertiesConfiguration(storeFile);
+            events.forEach(event -> cfg.setProperty("T" + event.time(), event.toString()));
+            cfg.save();
+        } catch (ConfigurationException e) {
+            print("Unable to store file %s", storeFile);
+        }
+    }
+
+    /**
+     * Removes all scenario log files.
+     */
+    private void removeLogs() {
+        File[] logFiles = logDir.listFiles();
+        if (logFiles != null && logFiles.length > 0) {
+            for (File file : logFiles) {
+                if (!file.delete()) {
+                    print("Unable to delete log file %s", file);
+                }
+            }
+        }
+    }
+
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Step.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Step.java
new file mode 100644
index 00000000..3d8ea983
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/Step.java
@@ -0,0 +1,129 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.base.MoreObjects;
+import org.onlab.graph.Vertex;
+
+import java.util.Objects;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Representation of a test step.
+ */
+public class Step implements Vertex {
+
+    protected final String name;
+    protected final String command;
+    protected final String env;
+    protected final String cwd;
+    protected final Group group;
+
+    /**
+     * Creates a new test step.
+     *
+     * @param name    step name
+     * @param command step command to execute
+     * @param env     path to file to be sourced into the environment
+     * @param cwd     path to current working directory for the step
+     * @param group   optional group to which this step belongs
+     */
+    public Step(String name, String command, String env, String cwd, Group group) {
+        this.name = checkNotNull(name, "Name cannot be null");
+        this.group = group;
+
+        // Set the command, environment and cwd
+        // If one is not given use the value from the enclosing group
+        this.command = command != null ? command : group != null && group.command != null ? group.command : null;
+        this.env = env != null ? env : group != null && group.env != null ? group.env : null;
+        this.cwd = cwd != null ? cwd : group != null && group.cwd != null ? group.cwd : null;
+    }
+
+    /**
+     * Returns the step name.
+     *
+     * @return step name
+     */
+    public String name() {
+        return name;
+    }
+
+    /**
+     * Returns the step command string.
+     *
+     * @return command string
+     */
+    public String command() {
+        return command;
+    }
+
+    /**
+     * Returns the step environment script path.
+     *
+     * @return env script path
+     */
+    public String env() {
+        return env;
+    }
+
+    /**
+     * Returns the step current working directory path.
+     *
+     * @return current working dir path
+     */
+    public String cwd() {
+        return cwd;
+    }
+
+    /**
+     * Returns the enclosing group; null if none.
+     *
+     * @return enclosing group or null
+     */
+    public Group group() {
+        return group;
+    }
+
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(name);
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        if (this == obj) {
+            return true;
+        }
+        if (obj instanceof Step) {
+            final Step other = (Step) obj;
+            return Objects.equals(this.name, other.name);
+        }
+        return false;
+    }
+
+    @Override
+    public String toString() {
+        return MoreObjects.toStringHelper(this)
+                .add("name", name)
+                .add("command", command)
+                .add("env", env)
+                .add("cwd", cwd)
+                .add("group", group)
+                .toString();
+    }
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/StepEvent.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/StepEvent.java
new file mode 100644
index 00000000..c9b81a24
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/StepEvent.java
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import org.onlab.stc.Coordinator.Status;
+
+import static java.lang.Long.parseLong;
+import static org.onlab.stc.Coordinator.Status.valueOf;
+
+/**
+ * Represents an event of execution of a scenario step or group.
+ */
+public class StepEvent {
+
+    private static final String SEP = "~";
+
+    private final String name;
+    private final long time;
+    private final Status status;
+    private final String command;
+
+    /**
+     * Creates a new step record.
+     *
+     * @param name    test step or group name
+     * @param time    time in millis since start of epoch
+     * @param status  step completion status
+     * @param command step command
+     */
+    public StepEvent(String name, long time, Status status, String command) {
+        this.name = name;
+        this.time = time;
+        this.status = status;
+        this.command = command;
+    }
+
+    /**
+     * Creates a new step record for non-running status.
+     *
+     * @param name    test step or group name
+     * @param status  status
+     * @param command step command
+     */
+    public StepEvent(String name, Status status, String command) {
+        this(name, System.currentTimeMillis(), status, command);
+    }
+
+    /**
+     * Returns the test step or test group name.
+     *
+     * @return step or group name
+     */
+    public String name() {
+        return name;
+    }
+
+    /**
+     * Returns the step event  time.
+     *
+     * @return time in millis since start of epoch
+     */
+    public long time() {
+        return time;
+    }
+
+    /**
+     * Returns the step completion status.
+     *
+     * @return completion status
+     */
+    public Status status() {
+        return status;
+    }
+
+    /**
+     * Returns the step command.
+     *
+     * @return step command
+     */
+    public String command() {
+        return command;
+    }
+
+
+    @Override
+    public String toString() {
+        return name + SEP + time + SEP + status + SEP + command;
+    }
+
+    /**
+     * Returns a record parsed from the specified string.
+     *
+     * @param string string encoding
+     * @return step record
+     */
+    public static StepEvent fromString(String string) {
+        String[] fields = string.split("~");
+        return fields.length == 4 ?
+                new StepEvent(fields[0], parseLong(fields[1]), valueOf(fields[2]),
+                              fields[3].equals("null") ? null : fields[3]) :
+                new StepEvent(fields[0], 0, Status.WAITING, null);
+    }
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/StepProcessListener.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/StepProcessListener.java
new file mode 100644
index 00000000..a8222d0b
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/StepProcessListener.java
@@ -0,0 +1,50 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+/**
+ * Entity capable of receiving notifications of process step execution events.
+ */
+public interface StepProcessListener {
+
+    /**
+     * Indicates that process step has started.
+     *
+     * @param step    subject step
+     * @param command actual command executed; includes run-time substitutions
+     */
+    default void onStart(Step step, String command) {
+    }
+
+    /**
+     * Indicates that process step has completed.
+     *
+     * @param step   subject step
+     * @param status step completion status
+     */
+    default void onCompletion(Step step, Coordinator.Status status) {
+    }
+
+    /**
+     * Notifies when a new line of output becomes available.
+     *
+     * @param step subject step
+     * @param line line of output
+     */
+    default void onOutput(Step step, String line) {
+    }
+
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/StepProcessor.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/StepProcessor.java
new file mode 100644
index 00000000..49943691
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/StepProcessor.java
@@ -0,0 +1,141 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import org.onlab.stc.Coordinator.Status;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.PrintWriter;
+
+import static java.lang.String.format;
+import static org.onlab.stc.Coordinator.Status.FAILED;
+import static org.onlab.stc.Coordinator.Status.SUCCEEDED;
+import static org.onlab.stc.Coordinator.print;
+
+/**
+ * Manages execution of the specified step or a group.
+ */
+class StepProcessor implements Runnable {
+
+    private static final String IGNORE_CODE = "~";
+    private static final String NEGATE_CODE = "!";
+
+    private static final int FAIL = -1;
+
+    static String launcher = "stc-launcher ";
+
+    private final Step step;
+    private final File logDir;
+    private String command;
+
+    private Process process;
+    private StepProcessListener delegate;
+
+    /**
+     * Creates a process monitor.
+     *
+     * @param step     step or group to be executed
+     * @param logDir   directory where step process log should be stored
+     * @param delegate process lifecycle listener
+     * @param command  actual command to execute
+     */
+    StepProcessor(Step step, File logDir, StepProcessListener delegate,
+                  String command) {
+        this.step = step;
+        this.logDir = logDir;
+        this.delegate = delegate;
+        this.command = command;
+    }
+
+    @Override
+    public void run() {
+        delegate.onStart(step, command);
+        int code = execute();
+        boolean ignoreCode = step.env() != null && step.env.equals(IGNORE_CODE);
+        boolean negateCode = step.env() != null && step.env.equals(NEGATE_CODE);
+        Status status = ignoreCode || code == 0 && !negateCode || code != 0 && negateCode ?
+                SUCCEEDED : FAILED;
+        delegate.onCompletion(step, status);
+    }
+
+    /**
+     * Executes the step process.
+     *
+     * @return exit code
+     */
+    private int execute() {
+        try (PrintWriter pw = new PrintWriter(logFile())) {
+            process = Runtime.getRuntime().exec(command());
+            processOutput(pw);
+
+            // Wait for the process to complete and get its exit code.
+            if (process.isAlive()) {
+                process.waitFor();
+            }
+            return process.exitValue();
+
+        } catch (IOException e) {
+            print("Unable to run step %s using command %s", step.name(), step.command());
+        } catch (InterruptedException e) {
+            print("Step %s interrupted", step.name());
+        }
+        return FAIL;
+    }
+
+    /**
+     * Returns ready-to-run command for the step.
+     *
+     * @return command to execute
+     */
+    private String command() {
+        return format("%s %s %s %s", launcher,
+                      step.env() != null ? step.env() : "-",
+                      step.cwd() != null ? step.cwd() : "-",
+                      command);
+    }
+
+    /**
+     * Captures output of the step process.
+     *
+     * @param pw print writer to send output to
+     * @throws IOException if unable to read output or write logs
+     */
+    private void processOutput(PrintWriter pw) throws IOException {
+        InputStream out = process.getInputStream();
+        BufferedReader br = new BufferedReader(new InputStreamReader(out));
+
+        // Slurp its combined stderr/stdout
+        String line;
+        while ((line = br.readLine()) != null) {
+            pw.println(line);
+            delegate.onOutput(step, line);
+        }
+    }
+
+    /**
+     * Returns the log file for the step output.
+     *
+     * @return log file
+     */
+    private File logFile() {
+        return new File(logDir, step.name() + ".log");
+    }
+
+}
diff --git a/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/package-info.java b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/package-info.java
new file mode 100644
index 00000000..56145899
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/java/org/onlab/stc/package-info.java
@@ -0,0 +1,20 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * System Test Coordinator tool for modular scenario-based testing.
+ */
+package org.onlab.stc;
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/main/resources/data.json b/framework/src/onos/utils/stc/src/main/resources/data.json
new file mode 100644
index 00000000..f5823744
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/resources/data.json
@@ -0,0 +1,1087 @@
+{
+    "requirements": [
+        {
+            "dst": "Reactive-Forwarding.Ping-2",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Link-2-Down"
+        },
+        {
+            "dst": "Final-Check-Logs-2",
+            "isSoft": true,
+            "src": "Fetch-Logs-2"
+        },
+        {
+            "dst": "Host-Intent.Ping-4",
+            "isSoft": false,
+            "src": "Host-Intent.Link-2-Up"
+        },
+        {
+            "dst": "Install-1",
+            "isSoft": false,
+            "src": "Wait-for-Start-1"
+        },
+        {
+            "dst": "Host-Intent.Link-1-Down",
+            "isSoft": false,
+            "src": "Host-Intent.Ping-2"
+        },
+        {
+            "dst": "Host-Intent.Link-2-Up",
+            "isSoft": false,
+            "src": "Host-Intent.Ping-5"
+        },
+        {
+            "dst": "Host-Intent.Ping-2",
+            "isSoft": false,
+            "src": "Host-Intent.Link-2-Down"
+        },
+        {
+            "dst": "Reinstall-App-With-CLI",
+            "isSoft": false,
+            "src": "Verify-CLI"
+        },
+        {
+            "dst": "Create-App-UI-Overlay",
+            "isSoft": false,
+            "src": "Build-App-With-UI"
+        },
+        {
+            "dst": "Secure-SSH",
+            "isSoft": true,
+            "src": "Wait-for-Start-1"
+        },
+        {
+            "dst": "Pause-For-Masters",
+            "isSoft": true,
+            "src": "Check-Flows"
+        },
+        {
+            "dst": "Secure-SSH",
+            "isSoft": true,
+            "src": "Wait-for-Start-3"
+        },
+        {
+            "dst": "Uninstall-3",
+            "isSoft": false,
+            "src": "Kill-3"
+        },
+        {
+            "dst": "Balance-Masters",
+            "isSoft": false,
+            "src": "Pause-For-Masters"
+        },
+        {
+            "dst": "Reactive-Forwarding.Net-Pingall",
+            "isSoft": true,
+            "src": "Reactive-Forwarding.Net-Link-Down-Up"
+        },
+        {
+            "dst": "Wait-for-Start-3",
+            "isSoft": true,
+            "src": "Check-Logs-3"
+        },
+        {
+            "dst": "Wait-for-Start-2",
+            "isSoft": true,
+            "src": "Check-Components-2"
+        },
+        {
+            "dst": "Uninstall-Reactive-Forwarding",
+            "isSoft": false,
+            "src": "Find-Host-1"
+        },
+        {
+            "dst": "Wipe-Out-Data-Before",
+            "isSoft": true,
+            "src": "Initial-Summary-Check"
+        },
+        {
+            "dst": "Reactive-Forwarding.Ping-3",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Link-1-Up"
+        },
+        {
+            "dst": "Archetypes",
+            "isSoft": true,
+            "src": "Wrapup"
+        },
+        {
+            "dst": "Reactive-Forwarding.Ping-4",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Link-2-Up"
+        },
+        {
+            "dst": "Host-Intent-Connectivity",
+            "isSoft": true,
+            "src": "Net-Teardown"
+        },
+        {
+            "dst": "Host-Intent.Ping-3",
+            "isSoft": false,
+            "src": "Host-Intent.Link-1-Up"
+        },
+        {
+            "dst": "Host-Intent.Ping-1",
+            "isSoft": false,
+            "src": "Host-Intent.Link-1-Down"
+        },
+        {
+            "dst": "Install-App",
+            "isSoft": false,
+            "src": "Create-App-CLI-Overlay"
+        },
+        {
+            "dst": "Final-Check-Logs-3",
+            "isSoft": true,
+            "src": "Fetch-Logs-3"
+        },
+        {
+            "dst": "Install-App",
+            "isSoft": false,
+            "src": "Verify-App"
+        },
+        {
+            "dst": "Host-Intent.Link-2-Down",
+            "isSoft": false,
+            "src": "Host-Intent.Ping-3"
+        },
+        {
+            "dst": "Prerequisites",
+            "isSoft": false,
+            "src": "Setup"
+        },
+        {
+            "dst": "Verify-App",
+            "isSoft": true,
+            "src": "Reinstall-App-With-CLI"
+        },
+        {
+            "dst": "Net-Smoke",
+            "isSoft": true,
+            "src": "Archetypes"
+        },
+        {
+            "dst": "Setup",
+            "isSoft": true,
+            "src": "Wrapup"
+        },
+        {
+            "dst": "Start-Mininet",
+            "isSoft": false,
+            "src": "Wait-For-Mininet"
+        },
+        {
+            "dst": "Verify-UI",
+            "isSoft": false,
+            "src": "Uninstall-App"
+        },
+        {
+            "dst": "Kill-3",
+            "isSoft": false,
+            "src": "Install-3"
+        },
+        {
+            "dst": "Wait-for-Start-1",
+            "isSoft": true,
+            "src": "Check-Components-1"
+        },
+        {
+            "dst": "Wait-for-Start-1",
+            "isSoft": true,
+            "src": "Check-Nodes-1"
+        },
+        {
+            "dst": "Push-Topos",
+            "isSoft": false,
+            "src": "Start-Mininet"
+        },
+        {
+            "dst": "Reactive-Forwarding.Check-Summary-For-Hosts",
+            "isSoft": true,
+            "src": "Reactive-Forwarding.Config-Topo"
+        },
+        {
+            "dst": "Reactive-Forwarding.Install-Apps",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Check-Apps"
+        },
+        {
+            "dst": "Push-Bits",
+            "isSoft": false,
+            "src": "Install-2"
+        },
+        {
+            "dst": "Install-1",
+            "isSoft": false,
+            "src": "Secure-SSH"
+        },
+        {
+            "dst": "Create-Intent",
+            "isSoft": false,
+            "src": "Host-Intent.Net-Link-Down-Up"
+        },
+        {
+            "dst": "Verify-CLI",
+            "isSoft": true,
+            "src": "Reinstall-App-With-UI"
+        },
+        {
+            "dst": "Wait-for-Start-3",
+            "isSoft": true,
+            "src": "Check-Apps-3"
+        },
+        {
+            "dst": "Net-Smoke",
+            "isSoft": true,
+            "src": "Wrapup"
+        },
+        {
+            "dst": "Initial-Summary-Check",
+            "isSoft": false,
+            "src": "Start-Mininet"
+        },
+        {
+            "dst": "Install-3",
+            "isSoft": false,
+            "src": "Wait-for-Start-3"
+        },
+        {
+            "dst": "Reactive-Forwarding.Link-1-Up",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Ping-4"
+        },
+        {
+            "dst": "Check-Summary",
+            "isSoft": true,
+            "src": "Balance-Masters"
+        },
+        {
+            "dst": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isSoft": true,
+            "src": "Host-Intent-Connectivity"
+        },
+        {
+            "dst": "Secure-SSH",
+            "isSoft": true,
+            "src": "Wait-for-Start-2"
+        },
+        {
+            "dst": "Build-App-With-CLI",
+            "isSoft": false,
+            "src": "Reinstall-App-With-CLI"
+        },
+        {
+            "dst": "Uninstall-1",
+            "isSoft": false,
+            "src": "Kill-1"
+        },
+        {
+            "dst": "Find-Host-1",
+            "isSoft": false,
+            "src": "Find-Host-2"
+        },
+        {
+            "dst": "Create-App-CLI-Overlay",
+            "isSoft": false,
+            "src": "Build-App-With-CLI"
+        },
+        {
+            "dst": "Net-Setup",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Net-Link-Down-Up"
+        },
+        {
+            "dst": "Kill-2",
+            "isSoft": false,
+            "src": "Install-2"
+        },
+        {
+            "dst": "Wait-for-Start-1",
+            "isSoft": true,
+            "src": "Check-Logs-1"
+        },
+        {
+            "dst": "Wait-for-Start-2",
+            "isSoft": true,
+            "src": "Check-Nodes-2"
+        },
+        {
+            "dst": "Reactive-Forwarding.Ping-All-And-Verify",
+            "isSoft": true,
+            "src": "Reactive-Forwarding.Check-Summary-For-Hosts"
+        },
+        {
+            "dst": "Clean-Up",
+            "isSoft": false,
+            "src": "Create-App"
+        },
+        {
+            "dst": "Host-Intent.Link-1-Up",
+            "isSoft": false,
+            "src": "Host-Intent.Ping-4"
+        },
+        {
+            "dst": "Build-App-With-UI",
+            "isSoft": false,
+            "src": "Reinstall-App-With-UI"
+        },
+        {
+            "dst": "Install-2",
+            "isSoft": false,
+            "src": "Secure-SSH"
+        },
+        {
+            "dst": "Wait-For-Mininet",
+            "isSoft": false,
+            "src": "Check-Summary"
+        },
+        {
+            "dst": "Host-Intent.Net-Link-Down-Up",
+            "isSoft": false,
+            "src": "Remove-Intent"
+        },
+        {
+            "dst": "Net-Setup",
+            "isSoft": false,
+            "src": "Host-Intent-Connectivity"
+        },
+        {
+            "dst": "Net-Setup",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Net-Pingall"
+        },
+        {
+            "dst": "Reactive-Forwarding.Link-2-Down",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Ping-3"
+        },
+        {
+            "dst": "Find-Host-2",
+            "isSoft": false,
+            "src": "Create-Intent"
+        },
+        {
+            "dst": "Wait-for-Start-2",
+            "isSoft": true,
+            "src": "Check-Apps-2"
+        },
+        {
+            "dst": "Final-Check-Logs-1",
+            "isSoft": true,
+            "src": "Fetch-Logs-1"
+        },
+        {
+            "dst": "Install-2",
+            "isSoft": false,
+            "src": "Wait-for-Start-2"
+        },
+        {
+            "dst": "Reactive-Forwarding.Ping-1",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Link-1-Down"
+        },
+        {
+            "dst": "Create-App",
+            "isSoft": false,
+            "src": "Build-App"
+        },
+        {
+            "dst": "Check-Summary",
+            "isSoft": true,
+            "src": "Check-Flows"
+        },
+        {
+            "dst": "Build-App",
+            "isSoft": false,
+            "src": "Install-App"
+        },
+        {
+            "dst": "Reinstall-App-With-UI",
+            "isSoft": false,
+            "src": "Verify-UI"
+        },
+        {
+            "dst": "Uninstall-2",
+            "isSoft": false,
+            "src": "Kill-2"
+        },
+        {
+            "dst": "Setup",
+            "isSoft": false,
+            "src": "Archetypes"
+        },
+        {
+            "dst": "Setup",
+            "isSoft": false,
+            "src": "Net-Smoke"
+        },
+        {
+            "dst": "Kill-1",
+            "isSoft": false,
+            "src": "Install-1"
+        },
+        {
+            "dst": "Reactive-Forwarding.Link-1-Down",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Ping-2"
+        },
+        {
+            "dst": "Wait-for-Start-2",
+            "isSoft": true,
+            "src": "Check-Logs-2"
+        },
+        {
+            "dst": "Wait-for-Start-3",
+            "isSoft": true,
+            "src": "Check-Components-3"
+        },
+        {
+            "dst": "Wait-for-Start-3",
+            "isSoft": true,
+            "src": "Check-Nodes-3"
+        },
+        {
+            "dst": "Stop-Mininet-If-Needed",
+            "isSoft": false,
+            "src": "Start-Mininet"
+        },
+        {
+            "dst": "Reactive-Forwarding.Link-2-Up",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Ping-5"
+        },
+        {
+            "dst": "Reactive-Forwarding.Check-Apps",
+            "isSoft": false,
+            "src": "Reactive-Forwarding.Ping-All-And-Verify"
+        },
+        {
+            "dst": "Install-3",
+            "isSoft": false,
+            "src": "Secure-SSH"
+        },
+        {
+            "dst": "Push-Bits",
+            "isSoft": false,
+            "src": "Install-3"
+        },
+        {
+            "dst": "Reinstall-App-With-CLI",
+            "isSoft": false,
+            "src": "Create-App-UI-Overlay"
+        },
+        {
+            "dst": "Push-Bits",
+            "isSoft": false,
+            "src": "Install-1"
+        },
+        {
+            "dst": "Wait-for-Start-1",
+            "isSoft": true,
+            "src": "Check-Apps-1"
+        }
+    ],
+    "steps": [
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Check-Summary",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Check-Flows",
+            "status": "waiting"
+        },
+        {
+            "group": "Wrapup",
+            "isGroup": false,
+            "name": "Final-Check-Logs-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Wrapup",
+            "isGroup": false,
+            "name": "Final-Check-Logs-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Clean-Up",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Build-App-With-UI",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Uninstall-App",
+            "status": "waiting"
+        },
+        {
+            "group": "Wrapup",
+            "isGroup": false,
+            "name": "Final-Check-Logs-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Host-Intent.Link-2-Down",
+            "status": "waiting"
+        },
+        {
+            "group": "Wrapup",
+            "isGroup": false,
+            "name": "Fetch-Logs-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Wrapup",
+            "isGroup": false,
+            "name": "Fetch-Logs-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Components-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Wrapup",
+            "isGroup": false,
+            "name": "Fetch-Logs-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Push-Topos",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Pingall",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Check-Apps",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Wait-for-Start-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Wait-for-Start-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Wait-for-Start-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Smoke",
+            "isGroup": true,
+            "name": "Host-Intent-Connectivity",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent-Connectivity",
+            "isGroup": false,
+            "name": "Create-Intent",
+            "status": "waiting"
+        },
+        {
+            "isGroup": true,
+            "name": "Prerequisites",
+            "status": "in_progress"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Push-Bits",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Logs-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Logs-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Kill-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Kill-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Kill-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent-Connectivity",
+            "isGroup": true,
+            "name": "Host-Intent.Net-Link-Down-Up",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Host-Intent.Ping-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Verify-UI",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Host-Intent.Ping-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Host-Intent.Ping-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Uninstall-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Logs-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Host-Intent.Ping-4",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Uninstall-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Host-Intent.Ping-5",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Uninstall-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Pingall",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Install-Apps",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Smoke",
+            "isGroup": true,
+            "name": "Reactive-Forwarding.Net-Link-Down-Up",
+            "status": "waiting"
+        },
+        {
+            "group": "Prerequisites",
+            "isGroup": false,
+            "name": "Check-ONOS-Bits",
+            "status": "in_progress"
+        },
+        {
+            "isGroup": true,
+            "name": "Wrapup",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Install-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent-Connectivity",
+            "isGroup": false,
+            "name": "Find-Host-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Install-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Wipe-Out-Data-Before",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Pause-For-Masters",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Link-2-Up",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Smoke",
+            "isGroup": true,
+            "name": "Reactive-Forwarding.Net-Pingall",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Components-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Components-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Reinstall-App-With-UI",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Reinstall-App-With-CLI",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Build-App-With-CLI",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent-Connectivity",
+            "isGroup": false,
+            "name": "Uninstall-Reactive-Forwarding",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Host-Intent.Link-2-Up",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Teardown",
+            "isGroup": false,
+            "name": "Stop-Mininet",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Pingall",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Config-Topo",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Create-App-CLI-Overlay",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Link-1-Down",
+            "status": "waiting"
+        },
+        {
+            "isGroup": true,
+            "name": "Net-Smoke",
+            "status": "waiting"
+        },
+        {
+            "group": "Prerequisites",
+            "isGroup": false,
+            "name": "Check-Passwordless-Login-2",
+            "status": "in_progress"
+        },
+        {
+            "group": "Prerequisites",
+            "isGroup": false,
+            "name": "Check-Passwordless-Login-1",
+            "status": "in_progress"
+        },
+        {
+            "group": "Prerequisites",
+            "isGroup": false,
+            "name": "Check-Passwordless-Login-3",
+            "status": "in_progress"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Secure-SSH",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Smoke",
+            "isGroup": true,
+            "name": "Net-Setup",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Nodes-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Install-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent-Connectivity",
+            "isGroup": false,
+            "name": "Find-Host-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Initial-Summary-Check",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Create-App",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Nodes-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Nodes-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Link-2-Down",
+            "status": "waiting"
+        },
+        {
+            "isGroup": true,
+            "name": "Setup",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Verify-App",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Ping-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Ping-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Start-Mininet",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Ping-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Ping-4",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Ping-5",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Verify-CLI",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Pingall",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Check-Summary-For-Hosts",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Smoke",
+            "isGroup": true,
+            "name": "Net-Teardown",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Host-Intent.Link-1-Up",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent-Connectivity",
+            "isGroup": false,
+            "name": "Remove-Intent",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Install-App",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Create-App-UI-Overlay",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Link-1-Up",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Wait-For-Mininet",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Apps-3",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Apps-2",
+            "status": "waiting"
+        },
+        {
+            "group": "Setup",
+            "isGroup": false,
+            "name": "Check-Apps-1",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Stop-Mininet-If-Needed",
+            "status": "waiting"
+        },
+        {
+            "group": "Prerequisites",
+            "isGroup": false,
+            "name": "Check-Environment",
+            "status": "in_progress"
+        },
+        {
+            "isGroup": true,
+            "name": "Archetypes",
+            "status": "waiting"
+        },
+        {
+            "group": "Host-Intent.Net-Link-Down-Up",
+            "isGroup": false,
+            "name": "Host-Intent.Link-1-Down",
+            "status": "waiting"
+        },
+        {
+            "group": "Net-Setup",
+            "isGroup": false,
+            "name": "Balance-Masters",
+            "status": "waiting"
+        },
+        {
+            "group": "Reactive-Forwarding.Net-Pingall",
+            "isGroup": false,
+            "name": "Reactive-Forwarding.Ping-All-And-Verify",
+            "status": "waiting"
+        },
+        {
+            "group": "Archetypes",
+            "isGroup": false,
+            "name": "Build-App",
+            "status": "waiting"
+        }
+    ]
+}
diff --git a/framework/src/onos/utils/stc/src/main/resources/index.html b/framework/src/onos/utils/stc/src/main/resources/index.html
new file mode 100644
index 00000000..c75bb8f2
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/resources/index.html
@@ -0,0 +1,29 @@
+<!DOCTYPE html>
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<html>
+<head lang="en">
+    <meta charset="utf-8">
+    <title>Scenario Test Coordinator</title>
+
+    <link rel="stylesheet" href="stc.css">
+
+    <script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
+    <script src="stc.js"></script>
+</head>
+<body>
+</body>
+</html>
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/main/resources/stc.css b/framework/src/onos/utils/stc/src/main/resources/stc.css
new file mode 100644
index 00000000..8d94253e
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/resources/stc.css
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+.body {
+    font-family: Helvetica, Arial, sans-serif;
+}
+
+.node {
+    stroke: #fff;
+    stroke-width: 1.5px;
+}
+
+.link {
+    stroke: #999;
+    stroke-opacity: .6;
+}
+
+text {
+    font-family: 'DejaVu Sans', Arial, Helvetica, sans-serif;
+    stroke: #000;
+    stroke-width: 0.2;
+    font-weight: normal;
+    font-size: 0.6em;
+}
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/main/resources/stc.js b/framework/src/onos/utils/stc/src/main/resources/stc.js
new file mode 100644
index 00000000..215fd6e2
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/main/resources/stc.js
@@ -0,0 +1,148 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+(function () {
+
+    var ws, flow,
+        nodes = [],
+        links = [],
+        nodeIndexes = {};
+
+    var width = 2400,
+        height = 2400;
+
+    var color = d3.scale.category20();
+
+    var force = d3.layout.force()
+        .charge(-820)
+        .linkDistance(50)
+        .size([width, height]);
+
+    // Process flow graph layout
+    function createNode(n) {
+        nodeIndexes[n.name] = nodes.push(n) - 1;
+    }
+
+    function createLink(e) {
+        e.source = nodeIndexes[e.src];
+        e.target = nodeIndexes[e.dst];
+        links.push(e);
+    }
+
+    // Returns the newly computed bounding box of the rectangle
+    function adjustRectToFitText(n) {
+        var text = n.select('text'),
+            box = text.node().getBBox();
+
+        text.attr('text-anchor', 'left')
+            .attr('y', 2)
+            .attr('x', 4);
+
+        // add padding
+        box.x -= 4;
+        box.width += 8;
+        box.y -= 2;
+        box.height += 4;
+
+        n.select("rect").attr(box);
+    }
+
+    function processFlow() {
+        var svg = d3.select("body").append("svg")
+            .attr("width", width)
+            .attr("height", height);
+
+        flow.steps.forEach(createNode);
+        flow.requirements.forEach(createLink);
+
+        force
+            .nodes(nodes)
+            .links(links)
+            .start();
+
+        var link = svg.selectAll(".link")
+            .data(links)
+          .enter().append("line")
+            .attr("class", "link")
+            .style("stroke-width", function(d) { return d.isSoft ? 1 : 2; });
+
+        var node = svg.selectAll(".node")
+            .data(nodes)
+          .enter().append("g")
+            .attr("class", "node")
+            .call(force.drag);
+
+        node.append("rect")
+            .attr({ rx: 5, ry:5, width:180, height:18 })
+            .style("fill", function(d) { return color(d.group); });
+
+        node.append("text").text( function(d) { return d.name; })
+            .attr({ dy:"1.1em", width:100, height:16, x:4, y:2 });
+
+        node.append("title")
+            .text(function(d) { return d.name; });
+
+        force.on("tick", function() {
+            link.attr("x1", function(d) { return d.source.x; })
+                .attr("y1", function(d) { return d.source.y; })
+                .attr("x2", function(d) { return d.target.x; })
+                .attr("y2", function(d) { return d.target.y; });
+
+            node.attr("transform", function(d) { return "translate(" + (d.x - 180/2) + "," + (d.y - 18/2) + ")"; });
+        });
+    }
+
+
+    // Web socket callbacks
+
+    function handleOpen() {
+        console.log('WebSocket open');
+    }
+
+    // Handles the specified (incoming) message using handler bindings.
+    function handleMessage(msg) {
+        console.log('rx: ', msg);
+        evt = JSON.parse(msg.data);
+        if (evt.event === 'progress') {
+
+        } else if (evt.event === 'log') {
+
+        } else if (evt.event === 'flow') {
+            flow = evt.payload;
+            processFlow();
+        }
+    }
+
+    function handleClose() {
+        console.log('WebSocket closed');
+    }
+
+    if (false) {
+        d3.json("data.json", function (error, data) {
+            flow = data;
+            processFlow();
+        });
+        return;
+    }
+
+    // Open the web-socket
+    ws = new WebSocket(document.location.href.replace('http:', 'ws:'));
+    if (ws) {
+        ws.onopen = handleOpen;
+        ws.onmessage = handleMessage;
+        ws.onclose = handleClose;
+    }
+
+})();
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/CompilerTest.java b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/CompilerTest.java
new file mode 100644
index 00000000..d70eff08
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/CompilerTest.java
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.io.Files;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileNotFoundException;
+import java.io.IOException;
+
+import static com.google.common.io.ByteStreams.toByteArray;
+import static com.google.common.io.Files.write;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertSame;
+import static org.onlab.stc.Scenario.loadScenario;
+
+/**
+ * Test of the test scenario compiler.
+ */
+public class CompilerTest {
+
+    static final File TEST_DIR = Files.createTempDir();
+
+    @BeforeClass
+    public static void setUpClass() throws IOException {
+        stageTestResource("scenario.xml");
+        stageTestResource("simple-scenario.xml");
+        stageTestResource("one-scenario.xml");
+        stageTestResource("two-scenario.xml");
+
+        System.setProperty("prop.foo", "Foobar");
+        System.setProperty("prop.bar", "Barfoo");
+        System.setProperty("TOC1", "1.2.3.1");
+        System.setProperty("TOC2", "1.2.3.2");
+        System.setProperty("TOC3", "1.2.3.3");
+        System.setProperty("test.dir", TEST_DIR.getAbsolutePath());
+    }
+
+    static FileInputStream getStream(String name) throws FileNotFoundException {
+        return new FileInputStream(new File(TEST_DIR, name));
+    }
+
+    static void stageTestResource(String name) throws IOException {
+        byte[] bytes = toByteArray(CompilerTest.class.getResourceAsStream(name));
+        write(bytes, new File(TEST_DIR, name));
+    }
+
+    @Test
+    public void basics() throws Exception {
+        Scenario scenario = loadScenario(getStream("scenario.xml"));
+        Compiler compiler = new Compiler(scenario);
+        compiler.compile();
+        ProcessFlow flow = compiler.processFlow();
+
+        assertSame("incorrect scenario", scenario, compiler.scenario());
+        assertEquals("incorrect step count", 24, flow.getVertexes().size());
+        assertEquals("incorrect dependency count", 16, flow.getEdges().size());
+        assertEquals("incorrect logDir",
+                     new File(TEST_DIR.getAbsolutePath(), "foo"), compiler.logDir());
+
+        Step step = compiler.getStep("there");
+        assertEquals("incorrect edge count", 2, flow.getEdgesFrom(step).size());
+        assertEquals("incorrect edge count", 0, flow.getEdgesTo(step).size());
+
+        Step group = compiler.getStep("three");
+        assertEquals("incorrect edge count", 2, flow.getEdgesFrom(group).size());
+        assertEquals("incorrect edge count", 0, flow.getEdgesTo(group).size());
+    }
+
+}
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/CoordinatorTest.java b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/CoordinatorTest.java
new file mode 100644
index 00000000..c6f057ec
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/CoordinatorTest.java
@@ -0,0 +1,83 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.onlab.util.Tools;
+
+import java.io.IOException;
+
+import static org.onlab.stc.CompilerTest.getStream;
+import static org.onlab.stc.Coordinator.print;
+import static org.onlab.stc.Scenario.loadScenario;
+
+/**
+ * Test of the test coordinator.
+ */
+public class CoordinatorTest {
+
+    private Coordinator coordinator;
+    private StepProcessListener listener = new Listener();
+
+    @BeforeClass
+    public static void setUpClass() throws IOException {
+        CompilerTest.setUpClass();
+        Tools.removeDirectory(StepProcessorTest.DIR);
+
+        StepProcessor.launcher = "true ";
+    }
+
+    @Test
+    public void simple() throws IOException, InterruptedException {
+        executeTest("simple-scenario.xml");
+    }
+
+    @Test
+    public void complex() throws IOException, InterruptedException {
+        executeTest("scenario.xml");
+    }
+
+    private void executeTest(String name) throws IOException, InterruptedException {
+        Scenario scenario = loadScenario(getStream(name));
+        Compiler compiler = new Compiler(scenario);
+        compiler.compile();
+        Tools.removeDirectory(compiler.logDir());
+        coordinator = new Coordinator(scenario, compiler.processFlow(), compiler.logDir());
+        coordinator.addListener(listener);
+        coordinator.reset();
+        coordinator.start();
+        coordinator.waitFor();
+        coordinator.removeListener(listener);
+    }
+
+    private class Listener implements StepProcessListener {
+        @Override
+        public void onStart(Step step, String command) {
+            print("> %s: started; %s", step.name(), command);
+        }
+
+        @Override
+        public void onCompletion(Step step, Coordinator.Status status) {
+            print("< %s: %s", step.name(), status == Coordinator.Status.SUCCEEDED ? "completed" : "failed");
+        }
+
+        @Override
+        public void onOutput(Step step, String line) {
+            print("  %s: %s", step.name(), line);
+        }
+    }
+}
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/DependencyTest.java b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/DependencyTest.java
new file mode 100644
index 00000000..4438303c
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/DependencyTest.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.testing.EqualsTester;
+import org.apache.commons.configuration.ConfigurationException;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.*;
+
+/**
+ * Test of the test step dependency.
+ */
+public class DependencyTest extends StepTest {
+
+    protected Step step1, step2;
+
+    @Before
+    public void setUp() throws ConfigurationException {
+        super.setUp();
+        step1 = new Step("step1", CMD, null, null, null);
+        step2 = new Step("step2", CMD, null, null, null);
+    }
+
+    @Test
+    public void hard() {
+        Dependency hard = new Dependency(step1, step2, false);
+        assertSame("incorrect src", step1, hard.src());
+        assertSame("incorrect dst", step2, hard.dst());
+        assertFalse("incorrect isSoft", hard.isSoft());
+    }
+
+    @Test
+    public void soft() {
+        Dependency soft = new Dependency(step2, step1, true);
+        assertSame("incorrect src", step2, soft.src());
+        assertSame("incorrect dst", step1, soft.dst());
+        assertTrue("incorrect isSoft", soft.isSoft());
+    }
+
+    @Test
+    public void equality() {
+        Dependency d1 = new Dependency(step1, step2, false);
+        Dependency d2 = new Dependency(step1, step2, false);
+        Dependency d3 = new Dependency(step1, step2, true);
+        Dependency d4 = new Dependency(step2, step1, true);
+        new EqualsTester()
+                .addEqualityGroup(d1, d2)
+                .addEqualityGroup(d3)
+                .addEqualityGroup(d4)
+                .testEquals();
+    }
+
+}
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/GroupTest.java b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/GroupTest.java
new file mode 100644
index 00000000..9b612c85
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/GroupTest.java
@@ -0,0 +1,54 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.testing.EqualsTester;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertSame;
+
+/**
+ * Test of the test scenario entity.
+ */
+public class GroupTest extends StepTest {
+
+    @Test
+    public void basics() {
+        Group group = new Group(NAME, CMD, ENV, CWD, parent);
+        assertEquals("incorrect name", NAME, group.name());
+        assertEquals("incorrect command", CMD, group.command());
+        assertEquals("incorrect env", ENV, group.env());
+        assertEquals("incorrect cwd", CWD, group.cwd());
+        assertSame("incorrect group", parent, group.group());
+
+        Step step = new Step("step", null, null, null, group);
+        group.addChild(step);
+        assertSame("incorrect child", step, group.children().iterator().next());
+    }
+
+    @Test
+    public void equality() {
+        Group g1 = new Group(NAME, CMD, null, null, parent);
+        Group g2 = new Group(NAME, CMD, ENV, CWD, null);
+        Group g3 = new Group("foo", null, null, null, parent);
+        new EqualsTester()
+                .addEqualityGroup(g1, g2)
+                .addEqualityGroup(g3)
+                .testEquals();
+    }
+
+}
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/MonitorLayoutTest.java b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/MonitorLayoutTest.java
new file mode 100644
index 00000000..4b7f5614
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/MonitorLayoutTest.java
@@ -0,0 +1,146 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import org.junit.Test;
+import org.onlab.stc.MonitorLayout.Box;
+
+import java.io.IOException;
+
+import static org.junit.Assert.assertEquals;
+import static org.onlab.stc.CompilerTest.getStream;
+import static org.onlab.stc.CompilerTest.stageTestResource;
+import static org.onlab.stc.MonitorLayout.SLOT_WIDTH;
+import static org.onlab.stc.Scenario.loadScenario;
+
+/**
+ * Tests of the monitor layout functionality.
+ */
+public class MonitorLayoutTest {
+
+    private MonitorLayout layout;
+
+    private Compiler getCompiler(String name) throws IOException {
+        stageTestResource(name);
+        Scenario scenario = loadScenario(getStream(name));
+        Compiler compiler = new Compiler(scenario);
+        compiler.compile();
+        return compiler;
+    }
+
+    @Test
+    public void basic() throws IOException {
+        layout = new MonitorLayout(getCompiler("layout-basic.xml"));
+        validate(layout, null, 0, 1, 5, 2);
+        validate(layout, "a", 1, 1, 1, 1, 1, -SLOT_WIDTH / 2);
+        validate(layout, "b", 2, 2, 1, 1, 0, 0);
+        validate(layout, "f", 3, 3, 1);
+
+        validate(layout, "g", 1, 1, 4, 1, 1, SLOT_WIDTH / 2);
+        validate(layout, "c", 2, 1, 1);
+        validate(layout, "d", 3, 2, 1);
+        validate(layout, "e", 4, 3, 1);
+    }
+
+    @Test
+    public void basicNest() throws IOException {
+        layout = new MonitorLayout(getCompiler("layout-basic-nest.xml"));
+        validate(layout, null, 0, 1, 6, 2);
+        validate(layout, "a", 1, 1, 1, 1, 1, -SLOT_WIDTH / 2);
+        validate(layout, "b", 2, 2, 1);
+        validate(layout, "f", 3, 3, 1);
+
+        validate(layout, "g", 1, 1, 5, 1);
+        validate(layout, "c", 2, 1, 1);
+
+        validate(layout, "gg", 3, 2, 3, 1);
+        validate(layout, "d", 4, 1, 1);
+        validate(layout, "e", 5, 2, 1);
+    }
+
+    @Test
+    public void staggeredDependencies() throws IOException {
+        layout = new MonitorLayout(getCompiler("layout-staggered-dependencies.xml"));
+        validate(layout, null, 0, 1, 7, 4);
+        validate(layout, "a", 1, 1, 1, 1, 1, -SLOT_WIDTH - SLOT_WIDTH / 2);
+        validate(layout, "aa", 1, 1, 1, 1, 1, -SLOT_WIDTH / 2);
+        validate(layout, "b", 2, 2, 1);
+        validate(layout, "f", 3, 3, 1);
+
+        validate(layout, "g", 1, 1, 5, 2, 1, +SLOT_WIDTH / 2);
+        validate(layout, "c", 2, 1, 1);
+
+        validate(layout, "gg", 3, 2, 3, 2);
+        validate(layout, "d", 4, 1, 1);
+        validate(layout, "dd", 4, 1, 1);
+        validate(layout, "e", 5, 2, 1);
+
+        validate(layout, "i", 6, 6, 1);
+    }
+
+    @Test
+    public void deepNext() throws IOException {
+        layout = new MonitorLayout(getCompiler("layout-deep-nest.xml"));
+        validate(layout, null, 0, 1, 7, 6);
+        validate(layout, "a", 1, 1, 1);
+        validate(layout, "aa", 1, 1, 1);
+        validate(layout, "b", 2, 2, 1);
+        validate(layout, "f", 3, 3, 1);
+
+        validate(layout, "g", 1, 1, 5, 2);
+        validate(layout, "c", 2, 1, 1);
+
+        validate(layout, "gg", 3, 2, 3, 2);
+        validate(layout, "d", 4, 1, 1);
+        validate(layout, "dd", 4, 1, 1);
+        validate(layout, "e", 5, 2, 1);
+
+        validate(layout, "i", 6, 6, 1);
+
+        validate(layout, "g1", 1, 1, 6, 2);
+        validate(layout, "g2", 2, 1, 5, 2);
+        validate(layout, "g3", 3, 1, 4, 2);
+        validate(layout, "u", 4, 1, 1);
+        validate(layout, "v", 4, 1, 1);
+        validate(layout, "w", 5, 2, 1);
+        validate(layout, "z", 6, 3, 1);
+    }
+
+
+    private void validate(MonitorLayout layout, String name,
+                          int absoluteTier, int tier, int depth, int breadth) {
+        Box b = layout.get(name);
+        assertEquals("incorrect absolute tier", absoluteTier, b.absoluteTier());
+        assertEquals("incorrect tier", tier, b.tier());
+        assertEquals("incorrect depth", depth, b.depth());
+        assertEquals("incorrect breadth", breadth, b.breadth());
+    }
+
+    private void validate(MonitorLayout layout, String name,
+                          int absoluteTier, int tier, int depth, int breadth,
+                          int top, int center) {
+        validate(layout, name, absoluteTier, tier, depth, breadth);
+        Box b = layout.get(name);
+        assertEquals("incorrect top", top, b.top());
+        assertEquals("incorrect center", center, b.center());
+    }
+
+    private void validate(MonitorLayout layout, String name,
+                          int absoluteTier, int tier, int depth) {
+        validate(layout, name, absoluteTier, tier, depth, 1);
+    }
+
+}
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/ScenarioTest.java b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/ScenarioTest.java
new file mode 100644
index 00000000..2aa51747
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/ScenarioTest.java
@@ -0,0 +1,44 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import org.apache.commons.configuration.ConfigurationException;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.onlab.stc.Scenario.loadScenario;
+
+/**
+ * Test of the test scenario entity.
+ */
+public class ScenarioTest {
+
+    @Test
+    public void basics() throws ConfigurationException {
+        Scenario scenario = loadScenario(getClass().getResourceAsStream("scenario.xml"));
+        assertEquals("incorrect name", "foo", scenario.name());
+        assertEquals("incorrect description", "Test Scenario", scenario.description());
+        assertEquals("incorrect logDir", "Test Scenario", scenario.description());
+        assertEquals("incorrect definition", "Test Scenario",
+                     scenario.definition().getString("[@description]"));
+    }
+
+    @Test(expected = IllegalArgumentException.class)
+    public void badStream() throws ConfigurationException {
+       loadScenario(getClass().getResourceAsStream("no.xml"));
+    }
+
+}
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/StepProcessorTest.java b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/StepProcessorTest.java
new file mode 100644
index 00000000..74d50241
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/StepProcessorTest.java
@@ -0,0 +1,84 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.io.Files;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.onlab.util.Tools;
+
+import java.io.File;
+import java.io.IOException;
+
+import static com.google.common.base.Preconditions.checkState;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.onlab.stc.Coordinator.Status.SUCCEEDED;
+
+/**
+ * Test of the step processor.
+ */
+public class StepProcessorTest {
+
+    static final File DIR = Files.createTempDir();
+    private final Listener delegate = new Listener();
+
+    @BeforeClass
+    public static void setUpClass() {
+        StepProcessor.launcher = "echo";
+        checkState(DIR.exists() || DIR.mkdirs(), "Unable to create directory");
+    }
+
+    @AfterClass
+    public static void tearDownClass() throws IOException {
+        Tools.removeDirectory(DIR.getPath());
+    }
+
+    @Test
+    public void basics() {
+        Step step = new Step("foo", "ls " + DIR.getAbsolutePath(), null, null, null);
+        StepProcessor processor = new StepProcessor(step, DIR, delegate, step.command());
+        processor.run();
+        assertTrue("should be started", delegate.started);
+        assertTrue("should be stopped", delegate.stopped);
+        assertEquals("incorrect status", SUCCEEDED, delegate.status);
+        assertTrue("should have output", delegate.output);
+    }
+
+    private class Listener implements StepProcessListener {
+
+        private Coordinator.Status status;
+        private boolean started, stopped, output;
+
+        @Override
+        public void onStart(Step step, String command) {
+            started = true;
+        }
+
+        @Override
+        public void onCompletion(Step step, Coordinator.Status status) {
+            stopped = true;
+            this.status = status;
+        }
+
+        @Override
+        public void onOutput(Step step, String line) {
+            output = true;
+        }
+    }
+
+}
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/StepTest.java b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/StepTest.java
new file mode 100644
index 00000000..71083624
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/java/org/onlab/stc/StepTest.java
@@ -0,0 +1,62 @@
+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.onlab.stc;
+
+import com.google.common.testing.EqualsTester;
+import org.apache.commons.configuration.ConfigurationException;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertSame;
+
+/**
+ * Test of the test step entity.
+ */
+public class StepTest {
+
+    protected static final String NAME = "step";
+    protected static final String CMD = "command";
+    protected static final String ENV = "environment";
+    protected static final String CWD = "directory";
+    protected Group parent;
+
+    @Before
+    public void setUp() throws ConfigurationException {
+        parent = new Group("parent", null, null, null, null);
+    }
+
+    @Test
+    public void basics() {
+        Step step = new Step(NAME, CMD, ENV, CWD, parent);
+        assertEquals("incorrect name", NAME, step.name());
+        assertEquals("incorrect command", CMD, step.command());
+        assertEquals("incorrect env", ENV, step.env());
+        assertEquals("incorrect cwd", CWD, step.cwd());
+        assertSame("incorrect group", parent, step.group());
+    }
+
+    @Test
+    public void equality() {
+        Step s1 = new Step(NAME, CMD, null, null, parent);
+        Step s2 = new Step(NAME, CMD, ENV, CWD, null);
+        Step s3 = new Step("foo", null, null, null, parent);
+        new EqualsTester()
+                .addEqualityGroup(s1, s2)
+                .addEqualityGroup(s3)
+                .testEquals();
+    }
+}
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-basic-nest.xml b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-basic-nest.xml
new file mode 100644
index 00000000..19c48db1
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-basic-nest.xml
@@ -0,0 +1,27 @@
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<scenario name="basic-nest">
+    <step name="a"/>
+    <step name="b" requires="a"/>
+    <step name="f" requires="b"/>
+    <group name="g">
+        <step name="c"/>
+        <group name="gg" requires="c">
+            <step name="d"/>
+            <step name="e" requires="d"/>
+        </group>
+    </group>
+</scenario>
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-basic.xml b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-basic.xml
new file mode 100644
index 00000000..d7dc1383
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-basic.xml
@@ -0,0 +1,25 @@
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<scenario name="basic">
+    <step name="a"/>
+    <step name="b" requires="a"/>
+    <step name="f" requires="b"/>
+    <group name="g">
+        <step name="c"/>
+        <step name="d" requires="c"/>
+        <step name="e" requires="d"/>
+    </group>
+</scenario>
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-deep-nest.xml b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-deep-nest.xml
new file mode 100644
index 00000000..bbe1ac19
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-deep-nest.xml
@@ -0,0 +1,41 @@
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<scenario name="basic-nest">
+    <step name="a"/>
+    <step name="aa"/>
+    <step name="b" requires="a"/>
+    <step name="f" requires="b,aa"/>
+    <group name="g">
+        <step name="c"/>
+        <group name="gg" requires="c">
+            <step name="d"/>
+            <step name="dd" requires="c"/>
+            <step name="e" requires="d"/>
+        </group>
+    </group>
+    <step name="i" requires="f,g"/>
+
+    <group name="g1">
+        <group name="g2">
+            <group name="g3">
+                <step name="u"/>
+                <step name="v"/>
+                <step name="w" requires="u,v"/>
+                <step name="z" requires="u,w"/>
+            </group>
+        </group>
+    </group>
+</scenario>
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-staggered-dependencies.xml b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-staggered-dependencies.xml
new file mode 100644
index 00000000..318b4ba1
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/layout-staggered-dependencies.xml
@@ -0,0 +1,30 @@
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<scenario name="basic-nest">
+    <step name="a"/>
+    <step name="aa"/>
+    <step name="b" requires="a"/>
+    <step name="f" requires="b,aa"/>
+    <group name="g">
+        <step name="c"/>
+        <group name="gg" requires="c">
+            <step name="d"/>
+            <step name="dd" requires="c"/>
+            <step name="e" requires="d"/>
+        </group>
+    </group>
+    <step name="i" requires="f,g"/>
+</scenario>
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/one-scenario.xml b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/one-scenario.xml
new file mode 100644
index 00000000..e5cb6f29
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/one-scenario.xml
@@ -0,0 +1,20 @@
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<scenario name="one" description="" logDir="/tmp/junit-stc/one">
+    <step name="yolo" exec="some-command args"/>
+    <step name="hello" exec="some-command other args" requires="yolo"/>
+</scenario>
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/scenario.xml b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/scenario.xml
new file mode 100644
index 00000000..34e67fd5
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/scenario.xml
@@ -0,0 +1,47 @@
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<scenario name="foo" description="Test Scenario" logDir="${test.dir}/foo">
+    <import file="${test.dir}/one-scenario.xml" namespace="foo"/>
+
+    <import file="${test.dir}/two-scenario.xml"/>
+
+    <dependency name="dude" requires="~yolo"/>
+
+    <step name="yo" exec="some-command ${HOME} and ${prop.foo} args" if="${prop.foo}"/>
+    <step name="hi" exec="some-command ${prop.bar} or ${HOME} other args"/>
+    <step name="there" exec="another-command" requires="yo,hi"/>
+
+    <step name="maybe" exec="another-command" requires="~hi" unless="${prop.foo}"/>
+
+    <group name="alpha" exec="same-command args" requires="yo">
+        <step name="one" exec="asdads"/>
+        <step name="two" exec="asdads"/>
+        <group name="three" exec="asdads" requires="one,two">
+            <step name="three.a"/>
+            <step name="three.b" requires="three.a"/>
+            <step name="three.c" requires="three.b"/>
+        </group>
+    </group>
+
+    <dependency name="maybe" requires="yo"/>
+
+    <parallel var="${TOC#}" requires="alpha">
+        <step name="ping-${#}" exec="asdads ${TOC#}"/>
+        <step name="pong-${#}" exec="asdads"/>
+        <step name="ding-${#}" exec="asdads" requires="ping-${#},pong-${#}"/>
+        <dependency name="maybe" requires="ding-${#}"/>
+    </parallel>
+</scenario>
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/simple-scenario.xml b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/simple-scenario.xml
new file mode 100644
index 00000000..c70fe872
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/simple-scenario.xml
@@ -0,0 +1,26 @@
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+<scenario name="foo" description="Simple Test Scenario" logDir="/tmp/junit-stc/foo">
+    <group name="alpha" exec="same-command args">
+        <step name="one" exec="asdads"/>
+        <step name="two" exec="asdads"/>
+        <group name="three" exec="asdads" requires="one,two">
+            <step name="three.a"/>
+            <step name="three.b" requires="three.a"/>
+            <step name="three.c" requires="three.b"/>
+        </group>
+    </group>
+</scenario>
\ No newline at end of file
diff --git a/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/two-scenario.xml b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/two-scenario.xml
new file mode 100644
index 00000000..0d6135d5
--- /dev/null
+++ b/framework/src/onos/utils/stc/src/test/resources/org/onlab/stc/two-scenario.xml
@@ -0,0 +1,21 @@
+<!--
+  ~ Copyright 2015 Open Networking Laboratory
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<scenario name="two" description="" logDir="/tmp/junit-stc/two">
+    <step name="dude" exec="some-command args"/>
+    <step name="waz" exec="some-command other args"/>
+    <step name="up" exec="another-command" requires="dude,waz"/>
+</scenario>
\ No newline at end of file