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Posted to commits@qpid.apache.org by ri...@apache.org on 2007/11/30 13:47:10 UTC
svn commit: r599805 - in
/incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp:
Client.java Server.java
Author: ritchiem
Date: Fri Nov 30 04:47:08 2007
New Revision: 599805
URL: http://svn.apache.org/viewvc?rev=599805&view=rev
Log:
Added new simple Request/Repsonse code as my last commit here seems to have missed the actual code.
Added:
incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Client.java (with props)
incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Server.java (with props)
Added: incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Client.java
URL: http://svn.apache.org/viewvc/incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Client.java?rev=599805&view=auto
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--- incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Client.java (added)
+++ incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Client.java Fri Nov 30 04:47:08 2007
@@ -0,0 +1,256 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+package org.apache.qpid.example.simple.reqresp;
+
+import javax.jms.Connection;
+import javax.jms.ConnectionFactory;
+import javax.jms.Destination;
+import javax.jms.JMSException;
+import javax.jms.Message;
+import javax.jms.MessageConsumer;
+import javax.jms.MessageListener;
+import javax.jms.MessageProducer;
+import javax.jms.Queue;
+import javax.jms.Session;
+import javax.jms.TextMessage;
+import javax.naming.Context;
+import javax.naming.InitialContext;
+import javax.naming.NamingException;
+import java.util.Properties;
+import java.util.concurrent.CountDownLatch;
+
+public class Client implements MessageListener
+{
+ final String BROKER = "localhost";
+
+ final String INITIAL_CONTEXT_FACTORY = "org.apache.qpid.jndi.PropertiesFileInitialContextFactory";
+
+ final String CONNECTION_JNDI_NAME = "local";
+ final String CONNECTION_NAME = "amqp://guest:guest@clientid/test?brokerlist='" + BROKER + "'";
+
+ final String QUEUE_JNDI_NAME = "queue";
+ final String QUEUE_NAME = "example.RequestQueue";
+
+
+ private InitialContext _ctx;
+
+ private static boolean TRANSACTED = true;
+ private static final boolean NOT_TRANSACTED = !TRANSACTED;
+ private CountDownLatch _shutdownHook = new CountDownLatch(1);
+
+ public Client()
+ {
+ setupJNDI();
+
+ Connection connection;
+ Session session;
+ Destination responseQueue;
+
+ //Setup the connection. Create producer to sent message and consumer to receive the repsonse.
+ MessageProducer _producer;
+ try
+ {
+ connection = ((ConnectionFactory) lookupJNDI(CONNECTION_JNDI_NAME)).createConnection();
+
+ session = connection.createSession(NOT_TRANSACTED, Session.AUTO_ACKNOWLEDGE);
+
+ Destination requestQueue = (Queue) lookupJNDI(QUEUE_JNDI_NAME);
+
+ closeJNDI();
+
+ //Setup a message _producer to send message to the queue the server is consuming from
+ _producer = session.createProducer(requestQueue);
+
+ //Create a temporary queue that this client will listen for responses on then create a consumer
+ //that consumes message from this temporary queue.
+ responseQueue = session.createTemporaryQueue();
+
+ MessageConsumer responseConsumer = session.createConsumer(responseQueue);
+
+ //Set a listener to asynchronously deal with responses.
+ responseConsumer.setMessageListener(this);
+
+ // Now the connection is setup up start it.
+ connection.start();
+ }
+ catch (JMSException e)
+ {
+ System.err.println("Unable to setup connection, client and producer on broker");
+ return;
+ }
+
+ // Setup the message to send
+ TextMessage txtMessage;
+ try
+ {
+ //Now create the actual message you want to send
+ txtMessage = session.createTextMessage("Request Process");
+
+ //Set the reply to field to the temp queue you created above, this is the queue the server will respond to
+ txtMessage.setJMSReplyTo(responseQueue);
+
+ //Set a correlation ID so when you get a response you know which sent message the response is for
+ //If there is never more than one outstanding message to the server then the
+ //same correlation ID can be used for all the messages...if there is more than one outstanding
+ //message to the server you would presumably want to associate the correlation ID with this message
+
+ txtMessage.setJMSCorrelationID(txtMessage.getJMSMessageID());
+ }
+ catch (JMSException e)
+ {
+ System.err.println("Unable to create message");
+ return;
+
+ }
+
+ try
+ {
+ _producer.send(txtMessage);
+ }
+ catch (JMSException e)
+ {
+ //Handle the exception appropriately
+ }
+
+ //Wait for the return message to arrive
+ try
+ {
+ _shutdownHook.await();
+ }
+ catch (InterruptedException e)
+ {
+ // Ignore this as we are quitting anyway.
+ }
+
+ //Close the connection
+ try
+ {
+ connection.close();
+ }
+ catch (JMSException e)
+ {
+ System.err.println("A problem occured while shutting down the connection : " + e);
+ }
+ }
+
+
+ /**
+ * Implementation of the Message Listener interface.
+ * This is where message will be asynchronously delivered.
+ *
+ * @param message
+ */
+ public void onMessage(Message message)
+ {
+ String messageText = null;
+ try
+ {
+ if (message instanceof TextMessage)
+ {
+ TextMessage textMessage = (TextMessage) message;
+ messageText = textMessage.getText();
+ System.out.println("messageText = " + messageText);
+ System.out.println("Correlation ID " + message.getJMSCorrelationID());
+
+ _shutdownHook.countDown();
+ }
+ else
+ {
+ System.err.println("Unexpected message delivered");
+ }
+ }
+ catch (JMSException e)
+ {
+ //Handle the exception appropriately
+ }
+ }
+
+ /**
+ * Lookup the specified name in the JNDI Context.
+ *
+ * @param name The string name of the object to lookup
+ *
+ * @return The object or null if nothing exists for specified name
+ */
+ private Object lookupJNDI(String name)
+ {
+ try
+ {
+ return _ctx.lookup(name);
+ }
+ catch (NamingException e)
+ {
+ System.err.println("Error looking up '" + name + "' in JNDI Context:" + e);
+ }
+
+ return null;
+ }
+
+ /**
+ * Setup the JNDI context.
+ *
+ * In this case we are simply using a Properties object to store the pairing information.
+ *
+ * Further details can be found on the wiki site here:
+ *
+ * @see : http://cwiki.apache.org/qpid/how-to-use-jndi.html
+ */
+ private void setupJNDI()
+ {
+ // Set the properties ...
+ Properties properties = new Properties();
+ properties.put(Context.INITIAL_CONTEXT_FACTORY, INITIAL_CONTEXT_FACTORY);
+ properties.put("connectionfactory." + CONNECTION_JNDI_NAME, CONNECTION_NAME);
+ properties.put("queue." + QUEUE_JNDI_NAME, QUEUE_NAME);
+
+ // Create the initial context
+ Context ctx = null;
+ try
+ {
+ _ctx = new InitialContext(properties);
+ }
+ catch (NamingException e)
+ {
+ System.err.println("Error Setting up JNDI Context:" + e);
+ }
+ }
+
+ /** Close the JNDI Context to keep everything happy. */
+ private void closeJNDI()
+ {
+ try
+ {
+ _ctx.close();
+ }
+ catch (NamingException e)
+ {
+ System.err.println("Unable to close JNDI Context : " + e);
+ }
+ }
+
+
+ public static void main(String[] args)
+ {
+ new Client();
+ }
+}
+
Propchange: incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Client.java
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svn:keywords = Rev Date
Added: incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Server.java
URL: http://svn.apache.org/viewvc/incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Server.java?rev=599805&view=auto
==============================================================================
--- incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Server.java (added)
+++ incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Server.java Fri Nov 30 04:47:08 2007
@@ -0,0 +1,220 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+package org.apache.qpid.example.simple.reqresp;
+
+import javax.jms.Connection;
+import javax.jms.ConnectionFactory;
+import javax.jms.Destination;
+import javax.jms.JMSException;
+import javax.jms.Message;
+import javax.jms.MessageConsumer;
+import javax.jms.MessageListener;
+import javax.jms.MessageProducer;
+import javax.jms.Queue;
+import javax.jms.Session;
+import javax.jms.TextMessage;
+import javax.naming.Context;
+import javax.naming.InitialContext;
+import javax.naming.NamingException;
+import java.util.Properties;
+import java.util.concurrent.CountDownLatch;
+
+public class Server implements MessageListener
+{
+ final String BROKER = "localhost";
+
+ final String INITIAL_CONTEXT_FACTORY = "org.apache.qpid.jndi.PropertiesFileInitialContextFactory";
+
+ final String CONNECTION_JNDI_NAME = "local";
+ final String CONNECTION_NAME = "amqp://guest:guest@clientid/test?brokerlist='" + BROKER + "'";
+
+ final String QUEUE_JNDI_NAME = "queue";
+ final String QUEUE_NAME = "example.RequestQueue";
+
+ private static boolean TRANSACTED = true;
+ private static final boolean NOT_TRANSACTED = !TRANSACTED;
+
+
+ private InitialContext _ctx;
+ private Session _session;
+ private MessageProducer _replyProducer;
+ private CountDownLatch _shutdownHook = new CountDownLatch(1);
+
+ public Server()
+ {
+ setupJNDI();
+
+ Connection connection = null;
+ try
+ {
+ connection = ((ConnectionFactory) lookupJNDI(CONNECTION_JNDI_NAME)).createConnection();
+
+ _session = connection.createSession(NOT_TRANSACTED, Session.AUTO_ACKNOWLEDGE);
+
+ Destination requestQueue = (Queue) lookupJNDI(QUEUE_JNDI_NAME);
+
+ closeJNDI();
+
+ //Setup a message producer to respond to messages from clients, we will get the destination
+ //to send to from the JMSReplyTo header field from a Message so we MUST set the destination here to null.
+ this._replyProducer = _session.createProducer(null);
+
+ //Set up a consumer to consume messages off of the request queue
+ MessageConsumer consumer = _session.createConsumer(requestQueue);
+ consumer.setMessageListener(this);
+
+ //Now start the connection
+ connection.start();
+ }
+ catch (JMSException e)
+ {
+ //Handle the exception appropriately
+ System.err.println("JMSException occured setting up server :" + e);
+ return;
+ }
+
+ //Wait to process an single message then quit.
+ try
+ {
+ _shutdownHook.await();
+ }
+ catch (InterruptedException e)
+ {
+ // Ignore this as we are quitting anyway.
+ }
+
+ //Close the connection
+ try
+ {
+ connection.close();
+ }
+ catch (JMSException e)
+ {
+ System.err.println("A problem occured while shutting down the connection : " + e);
+ }
+ }
+
+ public void onMessage(Message message)
+ {
+ try
+ {
+ TextMessage response = this._session.createTextMessage();
+
+ //Check we have the right message type.
+ if (message instanceof TextMessage)
+ {
+ TextMessage txtMsg = (TextMessage) message;
+ String messageText = txtMsg.getText();
+
+ //Perform the request
+ System.out.println("Received request:" + messageText + " for message :" + message.getJMSMessageID());
+
+ //Set the response back to the client
+ response.setText("Response to Request:" + messageText);
+ }
+
+ //Set the correlation ID from the received message to be the correlation id of the response message
+ //this lets the client identify which message this is a response to if it has more than
+ //one outstanding message to the server
+ response.setJMSCorrelationID(message.getJMSCorrelationID());
+
+ //Send the response to the Destination specified by the JMSReplyTo field of the received message,
+ //this is presumably a temporary queue created by the client
+ _replyProducer.send(message.getJMSReplyTo(), response);
+ }
+ catch (JMSException e)
+ {
+ //Handle the exception appropriately
+ }
+
+ _shutdownHook.countDown();
+ }
+
+ /**
+ * Lookup the specified name in the JNDI Context.
+ *
+ * @param name The string name of the object to lookup
+ *
+ * @return The object or null if nothing exists for specified name
+ */
+ private Object lookupJNDI(String name)
+ {
+ try
+ {
+ return _ctx.lookup(name);
+ }
+ catch (NamingException e)
+ {
+ System.err.println("Error looking up '" + name + "' in JNDI Context:" + e);
+ }
+
+ return null;
+ }
+
+ /**
+ * Setup the JNDI context.
+ *
+ * In this case we are simply using a Properties object to store the pairing information.
+ *
+ * Further details can be found on the wiki site here:
+ *
+ * @see : http://cwiki.apache.org/qpid/how-to-use-jndi.html
+ */
+ private void setupJNDI()
+ {
+ // Set the properties ...
+ Properties properties = new Properties();
+ properties.put(Context.INITIAL_CONTEXT_FACTORY, INITIAL_CONTEXT_FACTORY);
+ properties.put("connectionfactory." + CONNECTION_JNDI_NAME, CONNECTION_NAME);
+ properties.put("queue." + QUEUE_JNDI_NAME, QUEUE_NAME);
+
+ // Create the initial context
+ Context ctx = null;
+ try
+ {
+ _ctx = new InitialContext(properties);
+ }
+ catch (NamingException e)
+ {
+ System.err.println("Error Setting up JNDI Context:" + e);
+ }
+ }
+
+ /** Close the JNDI Context to keep everything happy. */
+ private void closeJNDI()
+ {
+ try
+ {
+ _ctx.close();
+ }
+ catch (NamingException e)
+ {
+ System.err.println("Unable to close JNDI Context : " + e);
+ }
+ }
+
+
+ public static void main(String[] args)
+ {
+ new Server();
+ }
+}
Propchange: incubator/qpid/branches/M2.1.1/java/client/example/src/main/java/org/apache/qpid/example/simple/reqresp/Server.java
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