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ActiveMQ example source code file (DemandForwardingBridge.java)

This example ActiveMQ source code file (DemandForwardingBridge.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - ActiveMQ tags/keywords

brokerid, brokerid, brokerinfo, demandforwardingbridge, demandforwardingbridgesupport, interruptedexception, io, ioexception, ioexception, logger, networkbridgefilter, object, object, transport, transport

The ActiveMQ DemandForwardingBridge.java source code

/**
 * 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.activemq.network;

import java.io.IOException;

import org.apache.activemq.command.BrokerId;
import org.apache.activemq.command.BrokerInfo;
import org.apache.activemq.command.Command;
import org.apache.activemq.command.ConsumerInfo;
import org.apache.activemq.command.NetworkBridgeFilter;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.util.ServiceSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * Forwards messages from the local broker to the remote broker based on demand.
 * 
 * @org.apache.xbean.XBean
 * 
 * 
 */
public class DemandForwardingBridge extends DemandForwardingBridgeSupport {
    private static final Logger LOG = LoggerFactory.getLogger(DemandForwardingBridge.class);

    protected final BrokerId remoteBrokerPath[] = new BrokerId[] {null};
    protected Object brokerInfoMutex = new Object();
    protected BrokerId remoteBrokerId;

    public DemandForwardingBridge(NetworkBridgeConfiguration configuration, Transport localBroker,
                                  Transport remoteBroker) {
        super(configuration, localBroker, remoteBroker);
    }

    protected void serviceRemoteBrokerInfo(Command command) throws IOException {
        synchronized (brokerInfoMutex) {
            BrokerInfo remoteBrokerInfo = (BrokerInfo)command;
            remoteBrokerId = remoteBrokerInfo.getBrokerId();
            remoteBrokerPath[0] = remoteBrokerId;
            remoteBrokerName = remoteBrokerInfo.getBrokerName();
            if (localBrokerId != null) {
                if (localBrokerId.equals(remoteBrokerId)) {
                    if (LOG.isTraceEnabled()) {
                        LOG.trace(configuration.getBrokerName() + " disconnecting remote loop back connection: " + remoteBrokerName);
                    }
                    ServiceSupport.dispose(this);
                }
            }
            if (LOG.isTraceEnabled()) {
                LOG.trace("counting down remoteBrokerNameKnownLatch with: " + command);
            }
            remoteBrokerNameKnownLatch.countDown();
        }
    }

    protected void addRemoteBrokerToBrokerPath(ConsumerInfo info) {
        info.setBrokerPath(appendToBrokerPath(info.getBrokerPath(), getRemoteBrokerPath()));
    }

    protected void serviceLocalBrokerInfo(Command command) throws InterruptedException {
        synchronized (brokerInfoMutex) {
            localBrokerId = ((BrokerInfo)command).getBrokerId();
            localBrokerPath[0] = localBrokerId;
            localBrokerIdKnownLatch.countDown();
            if (remoteBrokerId != null) {
                if (remoteBrokerId.equals(localBrokerId)) {
                    if (LOG.isTraceEnabled()) {
                        LOG.trace(configuration.getBrokerName() + " disconnecting local loop back connection.");
                    }
                    waitStarted();
                    ServiceSupport.dispose(this);
                }
            }
        }
    }

    protected NetworkBridgeFilter createNetworkBridgeFilter(ConsumerInfo info) throws IOException {
        return new NetworkBridgeFilter(remoteBrokerPath[0], configuration.getNetworkTTL());
    }

    protected BrokerId[] getRemoteBrokerPath() {
        return remoteBrokerPath;
    }
}

Other ActiveMQ examples (source code examples)

Here is a short list of links related to this ActiveMQ DemandForwardingBridge.java source code file:

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