ONOS-2957 added loding configuration component from file.
Change-Id: I916470e80252dbbc014d31777b55ba20ea199d80
diff --git a/core/net/src/main/java/org/onosproject/cfg/impl/ComponentConfigLoader.java b/core/net/src/main/java/org/onosproject/cfg/impl/ComponentConfigLoader.java
new file mode 100644
index 0000000..22f612a
--- /dev/null
+++ b/core/net/src/main/java/org/onosproject/cfg/impl/ComponentConfigLoader.java
@@ -0,0 +1,104 @@
+/*
+ * 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 com.google.common.collect.ImmutableSet;
+import com.google.common.collect.Sets;
+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.onlab.util.SharedExecutors;
+import org.onosproject.cfg.ComponentConfigService;
+import org.slf4j.Logger;
+
+import java.io.File;
+import java.util.Set;
+import java.util.TimerTask;
+
+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 File CFG_FILE = new File("../config/component-cfg.json");
+ private static final int RETRY_DELAY = 5_000; // millis between retries
+
+ private final Logger log = getLogger(getClass());
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected ComponentConfigService configService;
+
+ private ObjectNode root;
+ private final Set<String> pendingComponents = Sets.newHashSet();
+
+
+ /* TimerTask object that calls the load configuration for each component in the
+ pending components set and cancels itself if the set is mpty.
+ */
+ private final TimerTask loader = new TimerTask() {
+ @Override
+ public void run() {
+ ImmutableSet.copyOf(pendingComponents)
+ .forEach(k -> loadConfig(k, (ObjectNode) root.path(k)));
+ if (pendingComponents.isEmpty()) {
+ this.cancel();
+ }
+ }
+ };
+
+ @Activate
+ protected void activate() {
+ this.loadConfigs();
+ log.info("Started");
+ }
+ /* loads the configurations for each component from the file in
+ ../config/component-cfg.json, adds them to a set and schedules a task to try
+ and load them.
+ */
+ private void loadConfigs() {
+ try {
+ if (CFG_FILE.exists()) {
+ root = (ObjectNode) new ObjectMapper().readTree(CFG_FILE);
+ root.fieldNames().forEachRemaining(pendingComponents::add);
+ SharedExecutors.getTimer().schedule(loader, RETRY_DELAY, RETRY_DELAY);
+ log.info("Loaded initial component configuration from {}", CFG_FILE);
+ }
+ } catch (Exception e) {
+ log.warn("Unable to load initial component configuration from {}",
+ CFG_FILE, e);
+ }
+ }
+ /*
+ * loads a configuration for a single component and removes it from the
+ * components set
+ */
+ private void loadConfig(String component, ObjectNode config) {
+ if (configService.getComponentNames().contains(component)) {
+ config.fieldNames()
+ .forEachRemaining(k -> configService.setProperty(component, k,
+ config.path(k).asText()));
+ pendingComponents.remove(component);
+ }
+ }
+}
diff --git a/tools/package/config/component-cfg.json b/tools/package/config/component-cfg.json
new file mode 100644
index 0000000..f1168e4
--- /dev/null
+++ b/tools/package/config/component-cfg.json
@@ -0,0 +1,5 @@
+{
+ "org.onosproject.proxyarp.ProxyArp": {
+ "ipv6NeighborDiscovery": true
+ }
+}
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