Copycat messaging new happens over the same cluster messaging used for all other ONOS p2p communication
diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/service/impl/ClusterMessagingProtocolServer.java b/core/store/dist/src/main/java/org/onlab/onos/store/service/impl/ClusterMessagingProtocolServer.java
new file mode 100644
index 0000000..0449b8a
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/service/impl/ClusterMessagingProtocolServer.java
@@ -0,0 +1,110 @@
+package org.onlab.onos.store.service.impl;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.util.concurrent.CompletableFuture;
+
+import net.kuujo.copycat.protocol.PingRequest;
+import net.kuujo.copycat.protocol.PollRequest;
+import net.kuujo.copycat.protocol.RequestHandler;
+import net.kuujo.copycat.protocol.SubmitRequest;
+import net.kuujo.copycat.protocol.SyncRequest;
+import net.kuujo.copycat.spi.protocol.ProtocolServer;
+
+import org.onlab.onos.store.cluster.messaging.ClusterCommunicationService;
+import org.onlab.onos.store.cluster.messaging.ClusterMessage;
+import org.onlab.onos.store.cluster.messaging.ClusterMessageHandler;
+import org.slf4j.Logger;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ */
+
+public class ClusterMessagingProtocolServer implements ProtocolServer {
+
+ private final Logger log = getLogger(getClass());
+ private RequestHandler handler;
+
+ public ClusterMessagingProtocolServer(ClusterCommunicationService clusterCommunicator) {
+
+ clusterCommunicator.addSubscriber(
+ ClusterMessagingProtocol.COPYCAT_PING, new CopycatMessageHandler<PingRequest>());
+ clusterCommunicator.addSubscriber(
+ ClusterMessagingProtocol.COPYCAT_SYNC, new CopycatMessageHandler<SyncRequest>());
+ clusterCommunicator.addSubscriber(
+ ClusterMessagingProtocol.COPYCAT_POLL, new CopycatMessageHandler<PollRequest>());
+ clusterCommunicator.addSubscriber(
+ ClusterMessagingProtocol.COPYCAT_SUBMIT, new CopycatMessageHandler<SubmitRequest>());
+ }
+
+ @Override
+ public void requestHandler(RequestHandler handler) {
+ this.handler = handler;
+ }
+
+ @Override
+ public CompletableFuture<Void> listen() {
+ return CompletableFuture.completedFuture(null);
+ }
+
+ @Override
+ public CompletableFuture<Void> close() {
+ return CompletableFuture.completedFuture(null);
+ }
+
+ private class CopycatMessageHandler<T> implements ClusterMessageHandler {
+
+ @Override
+ public void handle(ClusterMessage message) {
+ T request = ClusterMessagingProtocol.SERIALIZER.decode(message.payload());
+ if (request.getClass().equals(PingRequest.class)) {
+ handler.ping((PingRequest) request).whenComplete((response, error) -> {
+ try {
+ message.respond(ClusterMessagingProtocol.SERIALIZER.encode(response));
+ } catch (Exception e) {
+ log.error("Failed to respond to ping request", e);
+ }
+ });
+ } else if (request.getClass().equals(PollRequest.class)) {
+ handler.poll((PollRequest) request).whenComplete((response, error) -> {
+ try {
+ message.respond(ClusterMessagingProtocol.SERIALIZER.encode(response));
+ } catch (Exception e) {
+ log.error("Failed to respond to poll request", e);
+ }
+ });
+ } else if (request.getClass().equals(SyncRequest.class)) {
+ handler.sync((SyncRequest) request).whenComplete((response, error) -> {
+ try {
+ message.respond(ClusterMessagingProtocol.SERIALIZER.encode(response));
+ } catch (Exception e) {
+ log.error("Failed to respond to sync request", e);
+ }
+ });
+ } else if (request.getClass().equals(SubmitRequest.class)) {
+ handler.submit((SubmitRequest) request).whenComplete((response, error) -> {
+ try {
+ message.respond(ClusterMessagingProtocol.SERIALIZER.encode(response));
+ } catch (Exception e) {
+ log.error("Failed to respond to submit request", e);
+ }
+ });
+ }
+ }
+ }
+}
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