DatabaseService that uses Copycat Raft to provide a strongly consistent and durable database.
diff --git a/core/store/dist/src/main/java/org/onlab/onos/store/service/impl/NettyProtocolServer.java b/core/store/dist/src/main/java/org/onlab/onos/store/service/impl/NettyProtocolServer.java
new file mode 100644
index 0000000..d06999e
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onlab/onos/store/service/impl/NettyProtocolServer.java
@@ -0,0 +1,115 @@
+package org.onlab.onos.store.service.impl;
+
+import static org.slf4j.LoggerFactory.getLogger;
+
+import java.io.IOException;
+import java.util.concurrent.CompletableFuture;
+
+import net.kuujo.copycat.cluster.TcpMember;
+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.netty.Message;
+import org.onlab.netty.MessageHandler;
+import org.onlab.netty.NettyMessagingService;
+import org.slf4j.Logger;
+
+/**
+ * {@link NettyMessagingService} based Copycat protocol server.
+ */
+public class NettyProtocolServer implements ProtocolServer {
+
+ private final Logger log = getLogger(getClass());
+
+ private final NettyMessagingService messagingService;
+ private RequestHandler handler;
+
+
+ public NettyProtocolServer(TcpMember member) {
+ messagingService = new NettyMessagingService(member.host(), member.port());
+
+ messagingService.registerHandler(NettyProtocol.COPYCAT_PING, new CopycatMessageHandler<PingRequest>());
+ messagingService.registerHandler(NettyProtocol.COPYCAT_SYNC, new CopycatMessageHandler<SyncRequest>());
+ messagingService.registerHandler(NettyProtocol.COPYCAT_POLL, new CopycatMessageHandler<PollRequest>());
+ messagingService.registerHandler(NettyProtocol.COPYCAT_SUBMIT, new CopycatMessageHandler<SubmitRequest>());
+ }
+
+ protected NettyMessagingService getNettyMessagingService() {
+ return messagingService;
+ }
+
+ @Override
+ public void requestHandler(RequestHandler handler) {
+ this.handler = handler;
+ }
+
+ @Override
+ public CompletableFuture<Void> listen() {
+ try {
+ messagingService.activate();
+ return CompletableFuture.completedFuture(null);
+ } catch (Exception e) {
+ CompletableFuture<Void> future = new CompletableFuture<>();
+ future.completeExceptionally(e);
+ return future;
+ }
+ }
+
+ @Override
+ public CompletableFuture<Void> close() {
+ CompletableFuture<Void> future = new CompletableFuture<>();
+ try {
+ messagingService.deactivate();
+ future.complete(null);
+ return future;
+ } catch (Exception e) {
+ future.completeExceptionally(e);
+ return future;
+ }
+ }
+
+ private class CopycatMessageHandler<T> implements MessageHandler {
+
+ @Override
+ public void handle(Message message) throws IOException {
+ T request = NettyProtocol.SERIALIZER.decode(message.payload());
+ if (request.getClass().equals(PingRequest.class)) {
+ handler.ping((PingRequest) request).whenComplete((response, error) -> {
+ try {
+ message.respond(NettyProtocol.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(NettyProtocol.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(NettyProtocol.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(NettyProtocol.SERIALIZER.encode(response));
+ } catch (Exception e) {
+ log.error("Failed to respond to submit request", e);
+ }
+ });
+ }
+ }
+ }
+}