How to specify the initial context detail for JMS connection factory lookup

Question

I faced a situation at work where I need to specify the initial context name to an underlying architecture component so that it can help me post message to a JMS Queue.

How do I specify the exact context factory name? I presume this is probably the string to be used "org.jnp.interfaces.namingcontextfactory" based on google results. I would like to understand what is the authoritative method to arrive at this string taking perhaps the jboss server configuration as the starting point?

Thanks Cinish

Solution

The initial context is a reference to a JNDI namespace where objects like JMS Queues can be looked up. I wrote this tutorial some time ago, which you might find helpful.

For a remote jboss server, there are 3 basic this should be (using the default port):

• java.naming.factory.initial: org.jnp.interfaces.NamingContextFactory
• java.naming.factory.url.pkgs: org.jboss.naming:org.jnp.interfaces
• java.naming.provider.url: <hostname>:1099

The code would look something like this:

import javax.naming.*;
import javax.jms.*;
import java.util.*;
.....
Properties jndiProps = new Properties();
jndiProps.put("java.naming.factory.initial", "org.jnp.interfaces.NamingContextFactory");
jndiProps.put("java.naming.factory.url.pkgs", "org.jboss.naming:org.jnp.interfaces");
jndiProps.put("java.naming.provider.url", "localhost:1099");
Context ctx = new InitialContext(jndiProps);
Queue jmsQueue = (Queue)ctx.lookup("jndi-name-of-queue");

If your code is running inside the jboss server, you don't need those properties since they are implicit.

import javax.naming.*;
import javax.jms.*;
.....
Context ctx = new InitialContext(); // no properties needed
Queue jmsQueue = (Queue)ctx.lookup("jndi-name-of-queue");

Comments

[user1053510]

Link to your tutorial leads to HTTP 404

[Nicholas]

Sorry about that. It was quite old and it got unlisted.

[Khaled Alanezi]

@Nicholas I'm following this tutorial here. It describes how to communicate between two clients using jms with glassfish server. The tutorial uses iiop://localhost:3700 as the provider url. However, the code is failing to connect with the reason: "Could not obtain connection to any of these urls: iiop://localhost:3700" .... "Failed to connect to server iiop:1099". Any idea what is wrong?

[Khaled Alanezi]

Note: when I try use an empty constructor for the context as suggested for local server situation, I'm also receiving an error: javax.naming.NoInitialContextException: "Need to specify class name in environment or system property, or in an application resource file: java.naming.factory.initial"