Sketching out component configuration model & API.
Added initial cut of implementation.
Finished implementation; ready for merge.
Change-Id: I385181c0591604a5c44986b97fb881eba7e0528e
diff --git a/core/store/dist/src/main/java/org/onosproject/store/cfg/GossipComponentConfigStore.java b/core/store/dist/src/main/java/org/onosproject/store/cfg/GossipComponentConfigStore.java
new file mode 100644
index 0000000..b70a291
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onosproject/store/cfg/GossipComponentConfigStore.java
@@ -0,0 +1,119 @@
+/*
+ * 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.store.cfg;
+
+import org.apache.felix.scr.annotations.Activate;
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Deactivate;
+import org.apache.felix.scr.annotations.Reference;
+import org.apache.felix.scr.annotations.ReferenceCardinality;
+import org.apache.felix.scr.annotations.Service;
+import org.onlab.util.KryoNamespace;
+import org.onosproject.cfg.ComponentConfigEvent;
+import org.onosproject.cfg.ComponentConfigStore;
+import org.onosproject.cfg.ComponentConfigStoreDelegate;
+import org.onosproject.cluster.ClusterService;
+import org.onosproject.store.AbstractStore;
+import org.onosproject.store.cluster.messaging.ClusterCommunicationService;
+import org.onosproject.store.ecmap.EventuallyConsistentMap;
+import org.onosproject.store.ecmap.EventuallyConsistentMapEvent;
+import org.onosproject.store.ecmap.EventuallyConsistentMapImpl;
+import org.onosproject.store.ecmap.EventuallyConsistentMapListener;
+import org.onosproject.store.impl.WallclockClockManager;
+import org.onosproject.store.serializers.KryoNamespaces;
+import org.slf4j.Logger;
+
+import static org.onosproject.cfg.ComponentConfigEvent.Type.PROPERTY_SET;
+import static org.onosproject.cfg.ComponentConfigEvent.Type.PROPERTY_UNSET;
+import static org.onosproject.store.ecmap.EventuallyConsistentMapEvent.Type.PUT;
+import static org.onosproject.store.ecmap.EventuallyConsistentMapEvent.Type.REMOVE;
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Manages inventory of component configurations in a distributed data store
+ * that uses optimistic replication and gossip based anti-entropy techniques.
+ */
+@Component(immediate = true)
+@Service
+public class GossipComponentConfigStore
+ extends AbstractStore<ComponentConfigEvent, ComponentConfigStoreDelegate>
+ implements ComponentConfigStore {
+
+ private static final String SEP = "#";
+
+ private final Logger log = getLogger(getClass());
+
+ private EventuallyConsistentMap<String, String> properties;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected ClusterCommunicationService clusterCommunicator;
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected ClusterService clusterService;
+
+ @Activate
+ public void activate() {
+ KryoNamespace.Builder serializer = KryoNamespace.newBuilder()
+ .register(KryoNamespaces.API);
+
+ properties = new EventuallyConsistentMapImpl<>("cfg", clusterService,
+ clusterCommunicator,
+ serializer,
+ new WallclockClockManager<>());
+ properties.addListener(new InternalPropertiesListener());
+ log.info("Started");
+ }
+
+ @Deactivate
+ public void deactivate() {
+ log.info("Stopped");
+ }
+
+ @Override
+ public void setProperty(String componentName, String name, String value) {
+ properties.put(key(componentName, name), value);
+
+ }
+
+ @Override
+ public void unsetProperty(String componentName, String name) {
+ properties.remove(key(componentName, name));
+ }
+
+ /**
+ * Listener to component configuration properties distributed map changes.
+ */
+ private final class InternalPropertiesListener
+ implements EventuallyConsistentMapListener<String, String> {
+
+ @Override
+ public void event(EventuallyConsistentMapEvent<String, String> event) {
+ String[] keys = event.key().split(SEP);
+ String value = event.value();
+ if (event.type() == PUT) {
+ delegate.notify(new ComponentConfigEvent(PROPERTY_SET, keys[0], keys[1], value));
+ } else if (event.type() == REMOVE) {
+ delegate.notify(new ComponentConfigEvent(PROPERTY_UNSET, keys[0], keys[1], null));
+ }
+ }
+ }
+
+ // Generates a key from component name and property name.
+ private String key(String componentName, String name) {
+ return componentName + SEP + name;
+ }
+
+}
diff --git a/core/store/dist/src/main/java/org/onosproject/store/cfg/package-info.java b/core/store/dist/src/main/java/org/onosproject/store/cfg/package-info.java
new file mode 100644
index 0000000..f8f8509
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onosproject/store/cfg/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.
+ */
+
+/**
+ * Implementation of distributed component configuration store.
+ */
+package org.onosproject.store.cfg;