/**
* 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.
*/
import java.io.IOException;
import java.util.Arrays;
import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.ExceptionListener;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;
/**
* A simple tool for consuming messages
*
* @version $Revision: 1.1.1.1 $
*/
public class Consumer implements MessageListener, ExceptionListener {
private boolean running;
private Session session;
private Destination destination;
private MessageProducer replyProducer;
private boolean pauseBeforeShutdown;
private boolean verbose = true;
private int maxiumMessages;
private String subject = "TOOL.DEFAULT";
private boolean topic;
private String user = ActiveMQConnection.DEFAULT_USER;
private String password = ActiveMQConnection.DEFAULT_PASSWORD;
private String url = ActiveMQConnection.DEFAULT_BROKER_URL;
private boolean transacted;
private boolean durable;
private String clientId;
private int ackMode = Session.CLIENT_ACKNOWLEDGE;
private String consumerName = "James";
private long sleepTime;
private long receiveTimeOut;
public static void main(String[] args) {
Consumer consumer = new Consumer();
String[] unknown = CommandLineSupport.setOptions(consumer, args);
if (unknown.length > 0) {
System.out.println("Unknown options: " + Arrays.toString(unknown));
System.exit(-1);
}
consumer.run();
}
public void run() {
try {
running = true;
System.out.println("Connecting to URL: " + url);
System.out.println("Consuming " + (topic ? "topic" : "queue") + ": " + subject);
System.out.println("Using a " + (durable ? "durable" : "non-durable") + " subscription");
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(user, password, url);
Connection connection = connectionFactory.createConnection();
if (durable && clientId != null && clientId.length() > 0 && !"null".equals(clientId)) {
connection.setClientID(clientId);
}
connection.setExceptionListener(this);
connection.start();
session = connection.createSession(transacted, ackMode);
destination = session.createTopic(subject);
replyProducer = session.createProducer(null);
replyProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
MessageConsumer consumer = null;
consumer = session.createConsumer(destination);
consumer.setMessageListener(this);
} catch (Exception e) {
System.out.println("Caught: " + e);
e.printStackTrace();
}
}
public void onMessage(Message message) {
try {
if (message instanceof TextMessage) {
TextMessage txtMsg = (TextMessage)message;
if (verbose) {
String msg = txtMsg.getText();
if (msg.length() > 50) {
msg = msg.substring(0, 50) + "...";
}
System.out.println("Received: " + msg);
}
} else {
if (verbose) {
System.out.println("Received: " + message);
}
}
if (message.getJMSReplyTo() != null) {
replyProducer.send(message.getJMSReplyTo(), session.createTextMessage("Reply: " + message.getJMSMessageID()));
}
if (transacted) {
session.commit();
} else if (ackMode == Session.CLIENT_ACKNOWLEDGE) {
message.acknowledge();
}
} catch (JMSException e) {
System.out.println("Caught: " + e);
e.printStackTrace();
} finally {
if (sleepTime > 0) {
try {
Thread.sleep(sleepTime);
} catch (InterruptedException e) {
}
}
}
}
public synchronized void onException(JMSException ex) {
System.out.println("JMS Exception occured. Shutting down client.");
running = false;
}
synchronized boolean isRunning() {
return running;
}
protected void consumeMessagesAndClose(Connection connection, Session session, MessageConsumer consumer) throws JMSException, IOException {
System.out.println("We are about to wait until we consume: " + maxiumMessages + " message(s) then we will shutdown");
Message message = consumer.receive(1000);
if (message != null) {
onMessage(message);
}
System.out.println("Closing connection");
consumer.close();
session.close();
connection.close();
if (pauseBeforeShutdown) {
System.out.println("Press return to shut down");
System.in.read();
}
}
protected void consumeMessagesAndClose(Connection connection, Session session, MessageConsumer consumer, long timeout) throws JMSException, IOException {
System.out.println("We will consume messages while they continue to be delivered within: " + timeout + " ms, and then we will shutdown");
Message message;
while ((message = consumer.receive(timeout)) != null) {
onMessage(message);
}
System.out.println("Closing connection");
consumer.close();
session.close();
connection.close();
if (pauseBeforeShutdown) {
System.out.println("Press return to shut down");
System.in.read();
}
}
public void setAckMode(String ackMode) {
if ("CLIENT_ACKNOWLEDGE".equals(ackMode)) {
this.ackMode = Session.CLIENT_ACKNOWLEDGE;
}
if ("AUTO_ACKNOWLEDGE".equals(ackMode)) {
this.ackMode = Session.AUTO_ACKNOWLEDGE;
}
if ("DUPS_OK_ACKNOWLEDGE".equals(ackMode)) {
this.ackMode = Session.DUPS_OK_ACKNOWLEDGE;
}
if ("SESSION_TRANSACTED".equals(ackMode)) {
this.ackMode = Session.SESSION_TRANSACTED;
}
}
public void setClientId(String clientID) {
this.clientId = clientID;
}
public void setConsumerName(String consumerName) {
this.consumerName = consumerName;
}
public void setDurable(boolean durable) {
this.durable = durable;
}
public void setMaxiumMessages(int maxiumMessages) {
this.maxiumMessages = maxiumMessages;
}
public void setPauseBeforeShutdown(boolean pauseBeforeShutdown) {
this.pauseBeforeShutdown = pauseBeforeShutdown;
}
public void setPassword(String pwd) {
this.password = pwd;
}
public void setReceiveTimeOut(long receiveTimeOut) {
this.receiveTimeOut = receiveTimeOut;
}
public void setSleepTime(long sleepTime) {
this.sleepTime = sleepTime;
}
public void setSubject(String subject) {
this.subject = subject;
}
public void setTopic(boolean topic) {
this.topic = topic;
}
public void setQueue(boolean queue) {
this.topic = !queue;
}
public void setTransacted(boolean transacted) {
this.transacted = transacted;
}
public void setUrl(String url) {
this.url = url;
}
public void setUser(String user) {
this.user = user;
}
public void setVerbose(boolean verbose) {
this.verbose = verbose;
}
}