/**
* 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.Endpoint;
import org.apache.activemq.command.NetworkBridgeFilter;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.util.ServiceSupport;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
/**
* A demand forwarding bridge which works with multicast style transports where
* a single Transport could be communicating with multiple remote brokers
*
* @org.apache.xbean.XBean
*
* @version $Revision: 564271 $
*/
public class CompositeDemandForwardingBridge extends DemandForwardingBridgeSupport {
private static final Log LOG = LogFactory.getLog(CompositeDemandForwardingBridge.class);
protected final BrokerId remoteBrokerPath[] = new BrokerId[] {null};
protected Object brokerInfoMutex = new Object();
public CompositeDemandForwardingBridge(NetworkBridgeConfiguration configuration, Transport localBroker,
Transport remoteBroker) {
super(configuration, localBroker, remoteBroker);
remoteBrokerName = remoteBroker.toString();
remoteBrokerNameKnownLatch.countDown();
}
protected void serviceRemoteBrokerInfo(Command command) throws IOException {
synchronized (brokerInfoMutex) {
BrokerInfo remoteBrokerInfo = (BrokerInfo)command;
BrokerId remoteBrokerId = remoteBrokerInfo.getBrokerId();
// lets associate the incoming endpoint with a broker ID so we can
// refer to it later
Endpoint from = command.getFrom();
if (from == null) {
LOG.warn("Incoming command does not have a from endpoint: " + command);
} else {
from.setBrokerInfo(remoteBrokerInfo);
}
if (localBrokerId != null) {
if (localBrokerId.equals(remoteBrokerId)) {
LOG.info("Disconnecting loop back connection.");
// waitStarted();
ServiceSupport.dispose(this);
}
}
if (!disposed) {
triggerLocalStartBridge();
}
}
}
protected void addRemoteBrokerToBrokerPath(ConsumerInfo info) throws IOException {
info.setBrokerPath(appendToBrokerPath(info.getBrokerPath(), getFromBrokerId(info)));
}
/**
* Returns the broker ID that the command came from
*/
protected BrokerId getFromBrokerId(Command command) throws IOException {
BrokerId answer = null;
Endpoint from = command.getFrom();
if (from == null) {
LOG.warn("Incoming command does not have a from endpoint: " + command);
} else {
answer = from.getBrokerId();
}
if (answer != null) {
return answer;
} else {
throw new IOException("No broker ID is available for endpoint: " + from + " from command: "
+ command);
}
}
protected void serviceLocalBrokerInfo(Command command) throws InterruptedException {
// TODO is there much we can do here?
}
protected NetworkBridgeFilter createNetworkBridgeFilter(ConsumerInfo info) throws IOException {
return new NetworkBridgeFilter(getFromBrokerId(info), configuration.getNetworkTTL());
}
protected BrokerId[] getRemoteBrokerPath() {
return remoteBrokerPath;
}
}