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ActiveMQ example source code file (StompTransportFilter.java)

This example ActiveMQ source code file (StompTransportFilter.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

command, command, frametranslator, frametranslator, io, ioexception, ioexception, jmsexception, logger, protocolconverter, received, stomptransportfilter, stomptransportfilter, transportlistener, x509certificate

The ActiveMQ StompTransportFilter.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.transport.stomp;

import java.io.IOException;
import java.security.cert.X509Certificate;

import javax.jms.JMSException;

import org.apache.activemq.broker.BrokerContext;
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.transport.tcp.SslTransport;
import org.apache.activemq.util.IOExceptionSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 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
 */
public class StompTransportFilter extends TransportFilter implements StompTransport {
    private static final Logger LOG = LoggerFactory.getLogger(StompTransportFilter.class);
    private final ProtocolConverter protocolConverter;
    private final FrameTranslator frameTranslator;

    private boolean trace;

    public StompTransportFilter(Transport next, FrameTranslator translator, BrokerContext brokerContext) {
        super(next);
        this.frameTranslator = translator;
        this.protocolConverter = new ProtocolConverter(this, translator, brokerContext);
    }

    public void oneway(Object o) throws IOException {
        try {
            final Command command = (Command)o;
            protocolConverter.onActiveMQCommand(command);
        } catch (JMSException e) {
            throw IOExceptionSupport.create(e);
        }
    }

    public void onCommand(Object command) {
        try {
            if (trace) {
                LOG.trace("Received: \n" + command);
            }
           
            protocolConverter.onStompCommand((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 X509Certificate[] getPeerCertificates() {
    	if(next instanceof SslTransport) {    	
    		X509Certificate[] peerCerts = ((SslTransport)next).getPeerCertificates();
    		if (trace && peerCerts != null) {
                LOG.debug("Peer Identity has been verified\n");
            }
    		return peerCerts;
    	}
    	return null;
    }
    
    public boolean isTrace() {
        return trace;
    }

    public void setTrace(boolean trace) {
        this.trace = trace;
    }
}

Other ActiveMQ examples (source code examples)

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

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