joram.bridgeamqp.AMQPReceiver.java Source code

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Here is the source code for joram.bridgeamqp.AMQPReceiver.java

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/*
 * JORAM: Java(TM) Open Reliable Asynchronous Messaging
 * Copyright (C) 2012 ScalAgent Distributed Technologies
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307
 * USA.
 *
 * Initial developer(s): ScalAgent Distributed Technologies
 * Contributor(s): 
 */
package joram.bridgeamqp;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectStreamClass;
import java.io.Serializable;

import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
import com.rabbitmq.client.DefaultConsumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.ShutdownSignalException;
import com.rabbitmq.client.AMQP.BasicProperties;

import framework.TestCase;

public class AMQPReceiver extends DefaultConsumer {
    public int nbmsgs = 0;
    private static Connection connection = null;

    public static AMQPReceiver createAMQPConsumer(String queue) throws IOException {
        ConnectionFactory cnxFactory = new ConnectionFactory();
        connection = cnxFactory.newConnection();
        Channel channel = connection.createChannel();

        AMQPReceiver consumer = new AMQPReceiver(channel, queue);
        channel.basicConsume(queue, true, consumer);

        return consumer;
    }

    public AMQPReceiver(Channel channel, String queue) {
        super(channel);
    }

    public void handleDelivery(String consumerTag, Envelope envelope, BasicProperties properties, byte[] body)
            throws IOException {
        byte type = Byte.parseByte(properties.getType());
        if (type == org.objectweb.joram.shared.messages.Message.TEXT) {
            String text = (String) getBody(body);
            //      System.out.println("receive msg = " + text);
            TestCase.assertEquals("Message number " + nbmsgs, text);
        } else {
            TestCase.assertTrue("Message type should be Text", false);
        }
        nbmsgs += 1;
    }

    public void handleShutdownSignal(String consumerTag, ShutdownSignalException sig) {
        System.out.println("handleShutdownSignal");
    }

    public void handleCancelOk(java.lang.String consumerTag) {
        System.out.println("handleCancelOk");
    }

    public void handleConsumeOk(java.lang.String consumerTag) {
        System.out.println("handleConsumeOk");
    }

    public void handleRecoverOk() {
        System.out.println("handleRecoverOk");
    }

    public void close() throws IOException {
        connection.close();
    }

    private Object getBody(byte[] body) {
        if (body == null)
            return null;

        ByteArrayInputStream bais = null;
        ObjectInputStream ois = null;
        Object obj = null;
        try {
            try {
                bais = new ByteArrayInputStream(body);
                ois = new ObjectInputStream(bais);
                obj = ois.readObject();
            } catch (ClassNotFoundException cnfexc) {
                // Could not build serialized object: reason could be linked to 
                // class loaders hierarchy in an application server.
                class Specialized_OIS extends ObjectInputStream {
                    Specialized_OIS(InputStream is) throws IOException {
                        super(is);
                    }

                    protected Class resolveClass(ObjectStreamClass osc) throws IOException, ClassNotFoundException {
                        String n = osc.getName();
                        return Class.forName(n, false, Thread.currentThread().getContextClassLoader());
                    }
                }

                bais = new ByteArrayInputStream(body);
                ois = new Specialized_OIS(bais);
                obj = ois.readObject();
            } finally {
                try {
                    ois.close();
                } catch (Exception e) {
                }
                try {
                    bais.close();
                } catch (Exception e) {
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
            obj = null;
        }

        return (Serializable) obj;
    }
}