Added an initial sketch of a distributed cluster store.
diff --git a/core/store/src/main/java/org/onlab/onos/store/cluster/impl/DistributedClusterStore.java b/core/store/src/main/java/org/onlab/onos/store/cluster/impl/DistributedClusterStore.java
new file mode 100644
index 0000000..ee09570
--- /dev/null
+++ b/core/store/src/main/java/org/onlab/onos/store/cluster/impl/DistributedClusterStore.java
@@ -0,0 +1,87 @@
+package org.onlab.onos.store.cluster.impl;
+
+import com.google.common.collect.ImmutableSet;
+import com.hazelcast.core.HazelcastInstance;
+import com.hazelcast.core.Member;
+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.onos.cluster.ClusterStore;
+import org.onlab.onos.cluster.ControllerNode;
+import org.onlab.onos.cluster.DefaultControllerNode;
+import org.onlab.onos.cluster.NodeId;
+import org.onlab.onos.store.StoreService;
+import org.onlab.packet.IpPrefix;
+import org.slf4j.Logger;
+
+import java.util.Set;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+/**
+ * Distributed implementation of the cluster nodes store.
+ */
+@Component(immediate = true)
+@Service
+public class DistributedClusterStore implements ClusterStore {
+
+ private final Logger log = getLogger(getClass());
+
+ @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+ protected StoreService storeService;
+
+ private HazelcastInstance theInstance;
+
+ // FIXME: experimental implementation; enhance to assure persistence and
+ // visibility to nodes that are not currently in the cluster
+
+ @Activate
+ public void activate() {
+ log.info("Started");
+ theInstance = storeService.getHazelcastInstance();
+
+ }
+
+ @Deactivate
+ public void deactivate() {
+ log.info("Stopped");
+ }
+
+ @Override
+ public ControllerNode getLocalNode() {
+ return node(theInstance.getCluster().getLocalMember());
+ }
+
+ @Override
+ public Set<ControllerNode> getNodes() {
+ ImmutableSet.Builder<ControllerNode> builder = ImmutableSet.builder();
+ for (Member member : theInstance.getCluster().getMembers()) {
+ builder.add(node(member));
+ }
+ return builder.build();
+ }
+
+ @Override
+ public ControllerNode getNode(NodeId nodeId) {
+ for (Member member : theInstance.getCluster().getMembers()) {
+ if (member.getUuid().equals(nodeId.toString())) {
+ return node(member);
+ }
+ }
+ return null;
+ }
+
+ @Override
+ public ControllerNode.State getState(NodeId nodeId) {
+ return ControllerNode.State.ACTIVE;
+ }
+
+ // Creates a controller node descriptor from the Hazelcast member.
+ private ControllerNode node(Member member) {
+ return new DefaultControllerNode(new NodeId(member.getUuid()),
+ IpPrefix.valueOf(member.getSocketAddress().getAddress().getAddress()));
+ }
+}