1 files changed, 74 insertions, 0 deletions
diff --git a/framework/src/onos/core/net/src/main/java/org/onosproject/cfg/impl/ComponentConfigLoader.java b/framework/src/onos/core/net/src/main/java/org/onosproject/cfg/impl/ComponentConfigLoader.java
new file mode 100644
index 00000000..6678db27
--- /dev/null
+++ b/framework/src/onos/core/net/src/main/java/org/onosproject/cfg/impl/ComponentConfigLoader.java
@@ -0,0 +1,74 @@
+/*
+ * 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.onosproject.cfg.impl;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.onosproject.cfg.ComponentConfigService;
+import org.slf4j.Logger;
+
+import java.io.File;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Component responsible for automatically loading configuration file from
+ * configuration directory.
+ */
+@Component(immediate = true)
+public class ComponentConfigLoader {
+
+    private static final String CFG_JSON = "../config/component-cfg.json";
+    static File cfgFile = new File(CFG_JSON);
+
+    private final Logger log = getLogger(getClass());
+
+    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    protected ComponentConfigService configService;
+
+    private ObjectNode root;
+
+    @Activate
+    protected void activate() {
+        this.loadConfigs();
+        log.info("Started");
+    }
+
+    // Loads the configurations for each component from the file in
+    // ../config/component-cfg.json, using the preSetProperty method.
+    private void loadConfigs() {
+        try {
+            if (cfgFile.exists()) {
+                root = (ObjectNode) new ObjectMapper().readTree(cfgFile);
+                root.fieldNames().
+                        forEachRemaining(component -> root.path(component).fieldNames()
+                                .forEachRemaining(k -> configService
+                                        .preSetProperty(component, k,
+                                                        root.path(component).path(k)
+                                                                .asText())));
+                log.info("Loaded initial component configuration from {}", cfgFile);
+            }
+        } catch (Exception e) {
+            log.warn("Unable to load initial component configuration from {}",
+                     cfgFile, e);
+        }
+    }
+}