public QLender(String queuecf, String requestQueue) {
try {
// Connect to the provider and get the JMS connection
Context ctx = new InitialContext();
QueueConnectionFactory qFactory = (QueueConnectionFactory) ctx.lookup(queuecf);
qConnect = qFactory.createQueueConnection();
// Create the JMS Session
qSession = qConnect.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
// Lookup the request queue
requestQ = (Queue) ctx.lookup(requestQueue);
// Now that setup is complete, start the Connection
qConnect.start();
// Create the message listener
QueueReceiver qReceiver = qSession.createReceiver(requestQ);
qReceiver.setMessageListener(this);
System.out.println("Waiting for loan requests...");
} catch (JMSException jmse) {
jmse.printStackTrace();
System.exit(1);
} catch (NamingException jne) {
jne.printStackTrace();
System.exit(1);
}
}
/**
* Wait for 'count' messages on controlQueue before continuing. Called by a publisher to make sure
* that subscribers have started before it begins publishing messages.
*
* <p>If controlQueue doesn't exist, the method throws an exception.
*
* @param prefix prefix (publisher or subscriber) to be displayed
* @param controlQueueName name of control queue
* @param count number of messages to receive
*/
public static void receiveSynchronizeMessages(String prefix, String controlQueueName, int count)
throws Exception {
QueueConnectionFactory queueConnectionFactory = null;
QueueConnection queueConnection = null;
QueueSession queueSession = null;
Queue controlQueue = null;
QueueReceiver queueReceiver = null;
try {
queueConnectionFactory = SampleUtilities.getQueueConnectionFactory();
queueConnection = queueConnectionFactory.createQueueConnection();
queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
controlQueue = getQueue(controlQueueName, queueSession);
queueConnection.start();
} catch (Exception e) {
System.out.println("Connection problem: " + e.toString());
if (queueConnection != null) {
try {
queueConnection.close();
} catch (JMSException ee) {
}
}
throw e;
}
try {
System.out.println(
prefix
+ "Receiving synchronize messages from "
+ controlQueueName
+ "; count = "
+ count);
queueReceiver = queueSession.createReceiver(controlQueue);
while (count > 0) {
queueReceiver.receive();
count--;
System.out.println(prefix + "Received synchronize message; expect " + count + " more");
}
} catch (JMSException e) {
System.out.println("Exception occurred: " + e.toString());
throw e;
} finally {
if (queueConnection != null) {
try {
queueConnection.close();
} catch (JMSException e) {
}
}
}
}
public static void main(String[] args) {
try {
QueueConnectionFactory queueConnectionFactory;
QueueConnection queueConnection;
QueueSession queueSession;
QueueReceiver queueReceiver;
Queue queue;
TextMessage msg;
// JNDI InitialContextを作成します
InitialContext ctx = new InitialContext();
// Connection FactoryとQueueをLook upします
queueConnectionFactory = (QueueConnectionFactory) ctx.lookup(JMS_FACTORY);
queue = (Queue) ctx.lookup(QUEUE);
// コネクションを作成
queueConnection = queueConnectionFactory.createQueueConnection();
// セッションを作成
queueSession = queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
// キューレシーバーを作成
queueReceiver = queueSession.createReceiver(queue);
// メッセージの配送をスタート
queueConnection.start();
// メッセージの受信
while (true) {
Message m = queueReceiver.receive(1);
if (m != null) {
if (m instanceof TextMessage) {
msg = (TextMessage) m;
System.out.println(msg.getText());
} else {
break;
}
}
}
// 接続を切断
queueReceiver.close();
queueSession.close();
queueConnection.close();
} catch (Exception e) {
e.printStackTrace();
}
}
