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java/org/apache/catalina/tribes/transport/ReplicationTransmitter.java

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+/*
+ * 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.
+ */
+package org.apache.catalina.tribes.transport;
+
+import javax.management.ObjectName;
+
+import org.apache.catalina.tribes.Channel;
+import org.apache.catalina.tribes.ChannelException;
+import org.apache.catalina.tribes.ChannelMessage;
+import org.apache.catalina.tribes.ChannelSender;
+import org.apache.catalina.tribes.Member;
+import org.apache.catalina.tribes.jmx.JmxRegistry;
+import org.apache.catalina.tribes.transport.nio.PooledParallelSender;
+
+/**
+ * Transmit message to other cluster members
+ * Actual senders are created based on the replicationMode
+ * type
+ */
+public class ReplicationTransmitter implements ChannelSender {
+
+    private Channel channel;
+
+    /**
+     * the ObjectName of this Sender.
+     */
+    private ObjectName oname = null;
+
+    public ReplicationTransmitter() {
+    }
+
+    private MultiPointSender transport = new PooledParallelSender();
+
+    public MultiPointSender getTransport() {
+        return transport;
+    }
+
+    public void setTransport(MultiPointSender transport) {
+        this.transport = transport;
+    }
+
+    // ------------------------------------------------------------- public
+
+    /**
+     * Send data to one member
+     * @see org.apache.catalina.tribes.ChannelSender#sendMessage(org.apache.catalina.tribes.ChannelMessage, org.apache.catalina.tribes.Member[])
+     */
+    @Override
+    public void sendMessage(ChannelMessage message, Member[] destination) throws ChannelException {
+        MultiPointSender sender = getTransport();
+        sender.sendMessage(destination,message);
+    }
+
+
+    /**
+     * start the sender and register transmitter mbean
+     *
+     * @see org.apache.catalina.tribes.ChannelSender#start()
+     */
+    @Override
+    public void start() throws java.io.IOException {
+        getTransport().connect();
+        // register jmx
+        JmxRegistry jmxRegistry = JmxRegistry.getRegistry(channel);
+        if (jmxRegistry != null) this.oname = jmxRegistry.registerJmx(",component=Sender", transport);
+    }
+
+    /**
+     * stop the sender and deregister mbeans (transmitter, senders)
+     *
+     * @see org.apache.catalina.tribes.ChannelSender#stop()
+     */
+    @Override
+    public synchronized void stop() {
+        getTransport().disconnect();
+        if (oname != null) {
+            JmxRegistry.getRegistry(channel).unregisterJmx(oname);
+            oname = null;
+        }
+        channel = null;
+    }
+
+    /**
+     * Call transmitter to check for sender socket status
+     *
+     * @see org.apache.catalina.ha.tcp.SimpleTcpCluster#backgroundProcess()
+     */
+    @Override
+    public void heartbeat() {
+        if (getTransport()!=null) getTransport().keepalive();
+    }
+
+    /**
+     * add new cluster member and create sender ( s. replicationMode) transfer
+     * current properties to sender
+     *
+     * @see org.apache.catalina.tribes.ChannelSender#add(org.apache.catalina.tribes.Member)
+     */
+    @Override
+    public synchronized void add(Member member) {
+        getTransport().add(member);
+    }
+
+    /**
+     * remove sender from transmitter. ( deregister mbean and disconnect sender )
+     *
+     * @see org.apache.catalina.tribes.ChannelSender#remove(org.apache.catalina.tribes.Member)
+     */
+    @Override
+    public synchronized void remove(Member member) {
+        getTransport().remove(member);
+    }
+
+    @Override
+    public Channel getChannel() {
+        return channel;
+    }
+
+    @Override
+    public void setChannel(Channel channel) {
+        this.channel = channel;
+    }
+
+}