1 files changed, 122 insertions, 0 deletions
diff --git a/framework/src/onos/cli/src/main/java/org/onosproject/cli/net/TopologyCommand.java b/framework/src/onos/cli/src/main/java/org/onosproject/cli/net/TopologyCommand.java
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+++ b/framework/src/onos/cli/src/main/java/org/onosproject/cli/net/TopologyCommand.java
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+/*
+ * Copyright 2014-2015 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.onosproject.cli.net;
+
+import java.text.DateFormat;
+import java.text.SimpleDateFormat;
+import java.util.Calendar;
+import java.util.concurrent.TimeUnit;
+
+import org.apache.karaf.shell.commands.Command;
+import org.apache.karaf.shell.commands.Option;
+import org.onosproject.cli.AbstractShellCommand;
+import org.onosproject.net.topology.Topology;
+import org.onosproject.net.topology.TopologyProvider;
+import org.onosproject.net.topology.TopologyService;
+
+/**
+ * Lists summary of the current topology.
+ */
+@Command(scope = "onos", name = "topology",
+description = "Lists summary of the current topology")
+public class TopologyCommand extends AbstractShellCommand {
+
+    private static final String FMT = "created=%s, uptime=%s, devices=%d, links=%d, clusters=%d";
+
+    @Option(name = "-r", aliases = "--recompute",
+            description = "Trigger topology re-computation", required = false,
+            multiValued = false)
+    private boolean recompute = false;
+
+    protected TopologyService service;
+    protected Topology topology;
+
+    /**
+     * Initializes the context for all cluster commands.
+     */
+    protected void init() {
+        service = get(TopologyService.class);
+        topology = service.currentTopology();
+    }
+
+    @Override
+    protected void execute() {
+        init();
+        long topologyUptime =
+                Math.max(0, (System.currentTimeMillis() - topology.creationTime()));
+        if (recompute) {
+            get(TopologyProvider.class).triggerRecompute();
+
+        } else if (outputJson()) {
+            print("%s",
+                    jsonForEntity(topology, Topology.class));
+        } else {
+            print(FMT, formatCreationTime(topology.creationTime()),
+                    formatElapsedTime(topologyUptime),
+                    topology.deviceCount(), topology.linkCount(),
+                    topology.clusterCount());
+        }
+    }
+
+    /**
+     * Converts millis to a formatted elapsed time string.
+     *
+     * @param millis Duration in millis to convert to a string
+     *
+     * @return Formatted string: "D days, H hrs, M mins, S secs".
+     */
+    private static String formatElapsedTime(long millis) {
+        if (millis < 0) {
+            throw new IllegalArgumentException("Interval less than zero. "
+                    + "Possible unsynchronized timestamps");
+        }
+
+        final long days = TimeUnit.MILLISECONDS.toDays(millis);
+        millis -= TimeUnit.DAYS.toMillis(days);
+        final long hours = TimeUnit.MILLISECONDS.toHours(millis);
+        millis -= TimeUnit.HOURS.toMillis(hours);
+        final long minutes = TimeUnit.MILLISECONDS.toMinutes(millis);
+        millis -= TimeUnit.MINUTES.toMillis(minutes);
+        final long seconds = TimeUnit.MILLISECONDS.toSeconds(millis);
+
+        final StringBuilder topologyUptimeString = new StringBuilder(64);
+        topologyUptimeString.append(days);
+        topologyUptimeString.append(" days, ");
+        topologyUptimeString.append(hours);
+        topologyUptimeString.append(" hrs, ");
+        topologyUptimeString.append(minutes);
+        topologyUptimeString.append(" mins, ");
+        topologyUptimeString.append(seconds);
+        topologyUptimeString.append(" secs");
+
+        return (topologyUptimeString.toString());
+    }
+
+    /**
+     * Converts millis to a formatted Date String.
+     *
+     * @param millis Duration in millis to convert to a string
+     *
+     * @return Formatted string: yyyy-MM-dd HH:mm:ss.
+     */
+    private static String formatCreationTime(long millis) {
+        final DateFormat dateFormatter =
+                new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
+        Calendar calendar = Calendar.getInstance();
+        calendar.setTimeInMillis(millis);
+        return (dateFormatter.format(calendar.getTime()));
+    }
+}