How to insert message in OC4J JMS from standalone java client.

Question

Hi,
I have been following available examples for creating standalone java clients to insert messages in JMS queues.
I am able to insert using java client when the SOA suite and the standalone java code are on same machine.
package producerconsumerinjava;
import javax.jms.*;
import javax.naming.*;
import java.util.Hashtable;
public class QueueProducer
public static void main(String[] args)
String queueName = "jms/demoQueue";
String queueConnectionFactoryName = "jms/QueueConnectionFactory";
Context jndiContext = null;
QueueConnectionFactory queueConnectionFactory = null;
QueueConnection queueConnection = null;
QueueSession queueSession = null;
Queue queue = null;
QueueSender queueSender = null;
TextMessage message = null;
int noMessages = 5;
* Set the environment for a connection to the OC4J instance
Hashtable env = new Hashtable();
env.put(Context.INITIAL_CONTEXT_FACTORY, "oracle.j2ee.rmi.RMIInitialContextFactory");
env.put(Context.SECURITY_PRINCIPAL, "oc4jadmin");
env.put(Context.SECURITY_CREDENTIALS, "mypass");
env.put(Context.PROVIDER_URL,"ormi://myserver.company.com:12402"); //12402 is the rmi port
* Set the Context Object.
* Lookup the Queue Connection Factory.
* Lookup the JMS Destination.
try
jndiContext = new InitialContext(env);
queueConnectionFactory =
(QueueConnectionFactory) jndiContext.lookup(queueConnectionFactoryName);
queue = (Queue) jndiContext.lookup(queueName);
catch (NamingException e)
System.out.println("JNDI lookup failed: " + e.toString());
System.exit(1);
* Create connection.
* Create session from connection.
* Create sender.
* Create text message.
* Send messages.
* Send non text message to end text messages.
* Close connection.
try
queueConnection = queueConnectionFactory.createQueueConnection();
queueSession =
queueConnection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
queueSender = queueSession.createSender(queue);
message = queueSession.createTextMessage();
for (int i = 0; i < noMessages; i++)
message.setText("Message " + (i + 1));
System.out.println("Producing message: " + message.getText());
queueSender.send(message);
queueSender.send(queueSession.createBytesMessage());
catch (JMSException e)
System.out.println("Exception occurred: " + e.toString());
finally
if (queueConnection != null)
try
queueConnection.close();
catch (JMSException e)
System.out.println("Closing error: " + e.toString());
But when the SOA Suite is remote, I am struggling to get the settings correct
Till now, here is what I have figured out from looking at blogs/tars etc on the Net:
1. I need to use ApplicationClientInitialContextFactory instead of RMIInitialContextFactory (http://download.oracle.com/docs/cd/E14101_01/doc.1013/e13975/jndi.htm)
2. The project should have a META-INF/application-client.xml file, which may be dummy (http://www.wever.org/java/space/Oracle/JmsTar1). Question is, my code is there in a single absolutely standalone code..how I can use this application-client.xml and where it has to be placed.
Errors:
When trying to run exact same code on local server that tries to enqueue JMS on remotee serverer
Exception occurred: javax.jms.JMSException: Unable to create a connection to "xxxxxxx.yyyyyy01.dev.com/10.42.456.11:12,602" as user "null".
Any help is greatly welcome.
As an exercise, I copied this complete code on the server and then ran locally using a telnet client...it worked. So the problem is coming when accessing the server remotely.
Rgds,
Amit

Answer 1

1. I need to use ApplicationClientInitialContextFactory instead of RMIInitialContextFactoryNot necessarily.
2. The project should have a META-INF/application-client.xml fileThat's only necessary if going the ApplicationClientInitialContextFactory route.
There are two types of JMS client applications you can write -- a pure/plain Java app, and an "AppClient". That first is your everyday run-of-the-mill Java application, nothing special. That latter is a special, complicated beast that tries to act as a part of the whole client/server/J2EE architecture which provides you with a semi-managed environment. Either can be made to work, but if all you need is JMS access (using plain OC4J JMS factory/queue names and not JMS Connector names), then the first is easier to get working (and performs a tiny bit better as well due to being a lighter-weight solution).
I think the problem you are having might be: When you use the plain Java client solution, you do not have any type of management, and that includes user management. With no user management (and if the JMS server is not configured to allow anonymous connections) you need to include the username and password in the call to createConnection. (I think it may be that this is actually true in the AppClient case as well -- I avoid using the AppClient model as much as possible so my memory there is weaker.)
If you prefer to go the AppClient route, I would point you to a demo I wrote which had a functioning example, but Oracle seems to have removed it (and all of the 10.1.3 demos?) from OTN. :-(
Hmm, it seems to still be available on the wayback machine:
http://web.archive.org/web/20061021064014/www.oracle.com/technology/tech/java/oc4j/1013/how_to/index.html
(Just look down the page for "With OEMS JMS (In-Memory and File-Based)" -- there is an .html document with info, and there is a .zip file with source code.)
Question is, my code is there in a single absolutely standalone code..how I can use this application-client.xml and where it has to be placed.The app client in my demo had the following directory structure:
myjavaclient.class
jndi.properties
META-INF\MANIFEST.MF
META-INF\application-client.xml
META-INF\orion-application-client.xml
When you use ApplicationClientInitialContextFactory I think it just looks under .\META-INF for the .xml files.
-Jeff