/**
* 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.proxy;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.activemq.Service;
import org.apache.activemq.command.ShutdownInfo;
import org.apache.activemq.command.WireFormatInfo;
import org.apache.activemq.transport.DefaultTransportListener;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.util.IOExceptionSupport;
import org.apache.activemq.util.ServiceStopper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
class ProxyConnection implements Service {
private static final Logger LOG = LoggerFactory.getLogger(ProxyConnection.class);
private final Transport localTransport;
private final Transport remoteTransport;
private AtomicBoolean shuttingDown = new AtomicBoolean(false);
private AtomicBoolean running = new AtomicBoolean(false);
public ProxyConnection(Transport localTransport, Transport remoteTransport) {
this.localTransport = localTransport;
this.remoteTransport = remoteTransport;
}
public void onFailure(IOException e) {
if (!shuttingDown.get()) {
LOG.debug("Transport error: " + e, e);
try {
stop();
} catch (Exception ignore) {
}
}
}
public void start() throws Exception {
if (!running.compareAndSet(false, true)) {
return;
}
this.localTransport.setTransportListener(new DefaultTransportListener() {
public void onCommand(Object command) {
boolean shutdown = false;
if (command.getClass() == ShutdownInfo.class) {
shuttingDown.set(true);
shutdown = true;
}
// skipping WireFormat infos
if (command.getClass() == WireFormatInfo.class) {
return;
}
try {
remoteTransport.oneway(command);
if (shutdown) {
stop();
}
} catch (IOException error) {
onFailure(error);
} catch (Exception error) {
onFailure(IOExceptionSupport.create(error));
}
}
public void onException(IOException error) {
onFailure(error);
}
});
this.remoteTransport.setTransportListener(new DefaultTransportListener() {
public void onCommand(Object command) {
try {
// skipping WireFormat infos
if (command.getClass() == WireFormatInfo.class) {
return;
}
localTransport.oneway(command);
} catch (IOException error) {
onFailure(error);
}
}
public void onException(IOException error) {
onFailure(error);
}
});
localTransport.start();
remoteTransport.start();
}
public void stop() throws Exception {
if (!running.compareAndSet(true, false)) {
return;
}
shuttingDown.set(true);
ServiceStopper ss = new ServiceStopper();
ss.stop(localTransport);
ss.stop(remoteTransport);
ss.throwFirstException();
}
}