/**
* test messages are acknowledged and recovered properly
*
* @throws Exception
*/
public void testClientAcknowledge() throws Exception {
Destination destination = createDestination(getClass().getName());
Connection connection = createConnection();
connection.setClientID(idGen.generateId());
connection.start();
Session consumerSession = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
MessageConsumer consumer = consumerSession.createConsumer(destination);
Session producerSession = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
MessageProducer producer = producerSession.createProducer(destination);
producer.setDeliveryMode(deliveryMode);
// send some messages
TextMessage sent1 = producerSession.createTextMessage();
sent1.setText("msg1");
sent1.setStringProperty("str", "1");
producer.send(sent1);
TextMessage sent2 = producerSession.createTextMessage();
sent2.setText("msg2");
sent2.setStringProperty("str", "2");
producer.send(sent2);
TextMessage sent3 = producerSession.createTextMessage();
sent2.setText("msg3");
sent2.setStringProperty("str", "3");
producer.send(sent3);
TextMessage msgTest = (TextMessage) consumer.receive(RECEIVE_TIMEOUT);
System.out.println("msgTest::" + msgTest + " // " + msgTest.getText());
TextMessage rec2 = (TextMessage) consumer.receive(RECEIVE_TIMEOUT);
System.out.println("msgTest::" + rec2 + " // " + rec2.getText());
assertNull(consumer.receiveNoWait());
// ack rec2
rec2.acknowledge();
TextMessage sent4 = producerSession.createTextMessage();
sent4.setText("msg4");
producer.send(sent4);
TextMessage rec4 = (TextMessage) consumer.receive(RECEIVE_TIMEOUT);
assertTrue(rec4.equals(sent4));
consumerSession.recover();
rec4 = (TextMessage) consumer.receive(RECEIVE_TIMEOUT);
assertTrue(rec4.equals(sent4));
assertTrue(rec4.getJMSRedelivered());
rec4.acknowledge();
connection.close();
}
/**
* Receive a message from destination with timeout.
*
* @param destinationName destinationName
* @param timeout timeout
* @return message
*/
public String receiveTextMessageFromDestinationWithTimeout(
final String destinationName, final int timeout) {
if (!this.isConnected()) {
throw new JmsNotConnectedException("Not connected");
}
MessageConsumer consumer = getConsumer(destinationName);
TextMessage message;
try {
if (timeout == 0) {
message = (TextMessage) consumer.receiveNoWait();
} else {
message = (TextMessage) consumer.receive(timeout);
}
if (message != null) {
if (acknowledgeMode == Session.CLIENT_ACKNOWLEDGE) {
message.acknowledge();
}
return message.getText();
} else {
return null;
}
} catch (JMSException e) {
throw new IllegalStateException("Unable to receive message from " + destinationName, e);
}
}
public void onMessage(Message message) {
try {
if (message instanceof TextMessage) {
TextMessage txtMessage = (TextMessage) message;
String[] results = txtMessage.getText().split("\n");
System.out.println("\nMessage received: string 1 = " + results[0]);
System.out.println("Message received: string 2 = " + results[1]);
txtMessage.acknowledge();
} else {
System.out.println("Invalid message received.");
}
} catch (JMSException e) {
System.out.println("Caught:" + e);
e.printStackTrace();
}
}
/** manually say OK I'm ready to take the message on the client */
public void doReceiveAck() {
if (doSetup()) {
try {
queueConnection = queueConnectionFactory.createQueueConnection();
QueueSession queueSession =
queueConnection.createQueueSession(false, Session.CLIENT_ACKNOWLEDGE);
QueueReceiver queueReceiver = queueSession.createReceiver(queue);
queueConnection.start();
String info = null;
while (true) {
Message m = queueReceiver.receive(1);
if (m != null) {
if (m instanceof TextMessage) {
TextMessage message = (TextMessage) m;
info = message.getText();
if (info.indexOf("12") > -1) {
log.debug("Skipping message:==> " + message.getText());
} else {
log.debug("Reading message:==> " + message.getText());
message.acknowledge();
}
} else {
break;
}
}
}
} catch (JMSException e) {
log.error("Listen Exception occurred: " + e.toString());
} finally {
doCleanup();
}
}
}
@Override
public boolean runExample() throws Exception {
final int numMessages = 30;
Connection connection = null;
InitialContext initialContext = null;
try {
// Step 1. Get an initial context for looking up JNDI from the server #1
initialContext = new InitialContext();
// Step 2. Look up the JMS resources from JNDI
Queue queue = (Queue) initialContext.lookup("queue/exampleQueue");
ConnectionFactory connectionFactory =
(ConnectionFactory) initialContext.lookup("ConnectionFactory");
// Step 3. Create a JMS Connection
connection = connectionFactory.createConnection();
// Step 4. Create a *non-transacted* JMS Session with client acknowledgement
Session session = connection.createSession(false, Session.CLIENT_ACKNOWLEDGE);
// Step 5. Start the connection to ensure delivery occurs
connection.start();
// Step 6. Create a JMS MessageProducer and a MessageConsumer
MessageProducer producer = session.createProducer(queue);
MessageConsumer consumer = session.createConsumer(queue);
// Step 7. Send some messages to server #1, the live server
for (int i = 0; i < numMessages; i++) {
TextMessage message = session.createTextMessage("This is text message " + i);
producer.send(message);
System.out.println("Sent message: " + message.getText());
}
// Step 8. Receive and acknowledge a third of the sent messages
TextMessage message0 = null;
for (int i = 0; i < numMessages / 3; i++) {
message0 = (TextMessage) consumer.receive(5000);
System.out.println("Got message: " + message0.getText());
}
message0.acknowledge();
// Step 9. Receive the rest third of the sent messages but *do not* acknowledge them yet
for (int i = numMessages / 3; i < numMessages; i++) {
message0 = (TextMessage) consumer.receive(5000);
System.out.println("Got message: " + message0.getText());
}
// Step 10. Crash server #1, the live server, and wait a little while to make sure
// it has really crashed
Thread.sleep(5000);
killServer(0);
// Step 11. Acknowledging the 2nd half of the sent messages will fail as failover to the
// backup server has occurred
try {
message0.acknowledge();
} catch (JMSException e) {
System.out.println(
"Got (the expected) exception while acknowledging message: " + e.getMessage());
}
// Step 12. Consume again the 2nd third of the messages again. Note that they are not
// considered as redelivered.
for (int i = numMessages / 3; i < (numMessages / 3) * 2; i++) {
message0 = (TextMessage) consumer.receive(5000);
System.out.printf(
"Got message: %s (redelivered?: %s)\n",
message0.getText(), message0.getJMSRedelivered());
}
message0.acknowledge();
reStartServer(0, 10000);
Thread.sleep(10000);
// Step 11. Acknowledging the 2nd half of the sent messages will fail as failover to the
// backup server has occurred
try {
message0.acknowledge();
} catch (JMSException e) {
System.err.println("Got exception while acknowledging message: " + e.getMessage());
}
// Step 12. Consume again the 2nd third of the messages again. Note that they are not
// considered as redelivered.
for (int i = (numMessages / 3) * 2; i < numMessages; i++) {
message0 = (TextMessage) consumer.receive(5000);
System.out.printf(
"Got message: %s (redelivered?: %s)\n",
message0.getText(), message0.getJMSRedelivered());
}
message0.acknowledge();
return true;
} finally {
// Step 13. Be sure to close our resources!
if (connection != null) {
connection.close();
}
if (initialContext != null) {
initialContext.close();
}
}
}