/**
* 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.transport.stomp;
import java.io.IOException;
import javax.jms.JMSException;
import org.apache.activemq.command.Command;
import org.apache.activemq.transport.Transport;
import org.apache.activemq.transport.TransportFilter;
import org.apache.activemq.transport.TransportListener;
import org.apache.activemq.util.IOExceptionSupport;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.context.ApplicationContext;
/**
* The StompTransportFilter normally sits on top of a TcpTransport that has been
* configured with the StompWireFormat and is used to convert STOMP commands to
* ActiveMQ commands. All of the conversion work is done by delegating to the
* ProtocolConverter.
*
* @author <a href="http://hiramchirino.com">chirino</a>
*/
public class StompTransportFilter extends TransportFilter {
private static final Log LOG = LogFactory.getLog(StompTransportFilter.class);
private final ProtocolConverter protocolConverter;
private final FrameTranslator frameTranslator;
private boolean trace;
public StompTransportFilter(Transport next, FrameTranslator translator, ApplicationContext applicationContext) {
super(next);
this.frameTranslator = translator;
this.protocolConverter = new ProtocolConverter(this, translator, applicationContext);
}
public void oneway(Object o) throws IOException {
try {
final Command command = (Command)o;
protocolConverter.onActiveMQCommad(command);
} catch (JMSException e) {
throw IOExceptionSupport.create(e);
}
}
public void onCommand(Object command) {
try {
if (trace) {
LOG.trace("Received: \n" + command);
}
protocolConverter.onStompCommad((StompFrame)command);
} catch (IOException e) {
onException(e);
} catch (JMSException e) {
onException(IOExceptionSupport.create(e));
}
}
public void sendToActiveMQ(Command command) {
TransportListener l = transportListener;
if (l!=null) {
l.onCommand(command);
}
}
public void sendToStomp(StompFrame command) throws IOException {
if (trace) {
LOG.trace("Sending: \n" + command);
}
Transport n = next;
if (n!=null) {
n.oneway(command);
}
}
public FrameTranslator getFrameTranslator() {
return frameTranslator;
}
public boolean isTrace() {
return trace;
}
public void setTrace(boolean trace) {
this.trace = trace;
}
}