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

/*
 * 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 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.transport.nio.PooledParallelSender;

/**
 * Transmit message to other cluster members
 * Actual senders are created based on the replicationMode
 * type
 */
public class ReplicationTransmitter implements ChannelSender {

    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();
    }

    /**
     * stop the sender and deregister mbeans (transmitter, senders)
     *
     * @see org.apache.catalina.tribes.ChannelSender#stop()
     */
    @Override
    public synchronized void stop() {
        getTransport().disconnect();
    }

    /**
     * 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);
    }
}