Added notion of a general Store abstraction and wired it up in ClusterStore.
diff --git a/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java b/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java
new file mode 100644
index 0000000..b9251dd
--- /dev/null
+++ b/apps/foo/src/main/java/org/onlab/onos/foo/FooComponent.java
@@ -0,0 +1,48 @@
+package org.onlab.onos.foo;
+
+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.onlab.onos.cluster.ClusterEvent;
+import org.onlab.onos.cluster.ClusterEventListener;
+import org.onlab.onos.cluster.ClusterService;
+import org.slf4j.Logger;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Playground app component.
+ */
+@Component(immediate = true)
+public class FooComponent {
+
+ private final Logger log = getLogger(getClass());
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected ClusterService clusterService;
+
+ private ClusterEventListener clusterListener = new InnerClusterListener();
+
+ @Activate
+ public void activate() {
+ clusterService.addListener(clusterListener);
+ log.info("Started");
+ }
+
+ @Deactivate
+ public void deactivate() {
+ clusterService.removeListener(clusterListener);
+ log.info("Stopped");
+ }
+
+ private class InnerClusterListener implements ClusterEventListener {
+ @Override
+ public void event(ClusterEvent event) {
+ log.info("WOOOOT! {}", event);
+ }
+ }
+}
+
+