Added custom transport implementaion (for Catalyst Transport) for all copycat specific communication

Change-Id: I801d973b7c3412f6a8efcec77fe73fc480b2ce6e
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/CopycatTransportClient.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/CopycatTransportClient.java
new file mode 100644
index 0000000..607e25d
--- /dev/null
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/impl/CopycatTransportClient.java
@@ -0,0 +1,74 @@
+/*
+ * Copyright 2016 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.primitives.impl;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import org.apache.commons.lang.math.RandomUtils;
+import org.onosproject.store.cluster.messaging.MessagingService;
+
+import com.google.common.collect.Sets;
+
+import io.atomix.catalyst.transport.Address;
+import io.atomix.catalyst.transport.Client;
+import io.atomix.catalyst.transport.Connection;
+import io.atomix.catalyst.util.concurrent.ThreadContext;
+
+/**
+ * {@link Client} implementation for {@link CopycatTransport}.
+ */
+public class CopycatTransportClient implements Client {
+
+    private final String clusterName;
+    private final MessagingService messagingService;
+    private final CopycatTransport.Mode mode;
+    private final ThreadContext context;
+    private final Set<CopycatTransportConnection> connections = Sets.newConcurrentHashSet();
+
+    CopycatTransportClient(String clusterName, MessagingService messagingService, CopycatTransport.Mode mode) {
+        this.clusterName = checkNotNull(clusterName);
+        this.messagingService = checkNotNull(messagingService);
+        this.mode = checkNotNull(mode);
+        this.context = ThreadContext.currentContextOrThrow();
+    }
+
+    @Override
+    public CompletableFuture<Connection> connect(Address remoteAddress) {
+        CopycatTransportConnection connection = new CopycatTransportConnection(
+                nextConnectionId(),
+                CopycatTransport.Mode.CLIENT,
+                clusterName,
+                remoteAddress,
+                messagingService,
+                context);
+        if (mode == CopycatTransport.Mode.CLIENT) {
+            connection.setBidirectional();
+        }
+        connections.add(connection);
+        return CompletableFuture.supplyAsync(() -> connection, context.executor());
+    }
+
+    @Override
+    public CompletableFuture<Void> close() {
+        return CompletableFuture.allOf(connections.stream().map(Connection::close).toArray(CompletableFuture[]::new));
+    }
+
+    private long nextConnectionId() {
+        return RandomUtils.nextLong();
+    }
+ }