/**
* Copyright 2010 JBoss Inc
*
* Licensed 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.jbpm.task.service.hornetq;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.HashMap;
import java.util.Map;
import java.util.concurrent.atomic.AtomicInteger;
import org.hornetq.api.core.HornetQException;
import org.hornetq.api.core.TransportConfiguration;
import org.hornetq.api.core.client.ClientConsumer;
import org.hornetq.api.core.client.ClientMessage;
import org.hornetq.api.core.client.ClientProducer;
import org.hornetq.api.core.client.ClientSession;
import org.hornetq.api.core.client.ClientSessionFactory;
import org.hornetq.api.core.client.HornetQClient;
import org.hornetq.integration.transports.netty.NettyConnectorFactory;
import org.hornetq.integration.transports.netty.TransportConstants;
import org.jbpm.task.service.BaseHandler;
import org.jbpm.task.service.TaskClientConnector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class HornetQTaskClientConnector implements TaskClientConnector {
private static final Logger logger = LoggerFactory.getLogger(HornetQTaskClientConnector.class);
protected ClientSession session;
protected final BaseHornetQHandler handler;
protected final String name;
protected AtomicInteger counter;
private String address;
private Integer port;
private ClientProducer producer;
private ClientConsumer consumer;
public HornetQTaskClientConnector(String name, BaseHornetQHandler handler) {
if (name == null) {
throw new IllegalArgumentException("Name can not be null");
}
this.name = name;
this.handler = handler;
this.counter = new AtomicInteger();
}
public boolean connect(String address, int port) {
this.port = port;
this.address = address;
return connect();
}
public boolean connect() {
if (session != null && !session.isClosed()) {
throw new IllegalStateException("Already connected. Disconnect first.");
}
try {
Map<String, Object> connectionParams = new HashMap<String, Object>();
if (address==null) {
address = "127.0.0.1";
}
if (port==null) {
port = 5445;
}
connectionParams.put(TransportConstants.PORT_PROP_NAME, port);
connectionParams.put(TransportConstants.HOST_PROP_NAME, address);
TransportConfiguration transportConfiguration = new TransportConfiguration(NettyConnectorFactory.class.getCanonicalName(), connectionParams);
ClientSessionFactory factory = HornetQClient.createClientSessionFactory(transportConfiguration);
session = factory.createSession();
producer = session.createProducer(HornetQTaskServer.SERVER_TASK_COMMANDS_QUEUE);
createClientQueue();
Thread responsesThread = new Thread(new Runnable() {
public void run() {
try {
consumer = session.createConsumer(name);
while (true) {
ClientMessage serverMessage = consumer.receive();
if (serverMessage!=null) {
((HornetQTaskClientHandler)handler).messageReceived(session, readMessage(serverMessage), BaseHornetQTaskServer.SERVER_TASK_COMMANDS_QUEUE);
}
}
}
catch (HornetQException e) {
if (e.getCode()!=HornetQException.OBJECT_CLOSED) {
throw new RuntimeException("Client Exception with class " + getClass() + " using port " + port, e);
}
logger.info(e.getMessage());
}
catch (Exception e) {
throw new RuntimeException("Client Exception with class " + getClass() + " using port " + port, e);
}
}
});
responsesThread.start();
session.start();
return true;
} catch (Exception e) {
logger.error(e.getMessage());
return false;
}
}
private Object readMessage(ClientMessage serverMessage) throws IOException, ClassNotFoundException {
int bodySize = serverMessage.getBodySize();
byte[] message = new byte[bodySize];
serverMessage.getBodyBuffer().readBytes(message);
ByteArrayInputStream bais = new ByteArrayInputStream(message);
ObjectInputStream ois = new ObjectInputStream(bais);
return ois.readObject();
}
private void createClientQueue() {
try {
session.createQueue(name, name, true);
}
catch (HornetQException e) {
if (e.getCode()!=HornetQException.QUEUE_EXISTS) {
throw new RuntimeException("Client Exception with class " + getClass() + " using port " + port, e);
}
logger.info(e.getMessage());
}
}
public void disconnect() throws Exception {
if (session!= null && !session.isClosed()) {
session.close();
producer.close();
if (consumer!=null) {
consumer.close();
}
}
}
public void write(Object object) {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oout;
try {
oout = new ObjectOutputStream(baos);
oout.writeObject(object);
ClientMessage message = session.createMessage(true);
message.getBodyBuffer().writeBytes(baos.toByteArray());
message.putStringProperty("producerId", name);
producer.send(message);
} catch (IOException e) {
throw new RuntimeException("Error creating message", e);
} catch (HornetQException e) {
throw new RuntimeException("Error writing message", e);
}
}
public AtomicInteger getCounter() {
return counter;
}
public BaseHandler getHandler() {
return handler;
}
public String getName() {
return name;
}
}