JMS in GlassFish

The Java Message Service (JMS) API is a Java Message Oriented Middleware (MOM) API for sending messages between two or more clients. JMS is a part of the Java Platform, Enterprise Edition, and is defined by a specification developed under the Java Community Process as JSR 914. It is a messaging standard that allows application components based on the Java Enterprise Edition (JEE) to create, send, receive, and read messages. It allows the communication between different components of a distributed application to be loosely coupled, reliable, and asynchronous.

JMS Connection Factories:
          Java Message Service (JMS) connection factories are objects that allow an application to create other JMS objects programmatically.

Destination Resources:
        JMS destinations serve as the repositories for messages.

There are two types of destination resources :

Queue:
         It ensures the delivery of messages to exactly one recipient. It is a one to one communication.
Topic:
        It ensures the delivery of messages to multiple recipients. It is a one to many communication.

Example:
        In this example we are going to create a Connection Factory and Queue as a destination resource.

Step1:

      Click on JMS Resources and click Connection Factories.

 

Step2:
       Click on New to create a new Connection Factory.

Step3:
      Enter the Pool Name as jms/tConnectionFactory.
  
      Select the Resource Type as javax.jms.ConnectionFactory.

Step4:
      Select the server as a target.

Step5:
     Click on Destination Resources and click on New to create a new Destination Resource.

Step6:
      Enter JNDI Name as jms/tQueue

      Enter Physical Destination Name as tQueue

      Select the Resource Type as javax.jms.Queue

Step7:
      Select the server as the target.

Step8:
      That’s it; The configuration of JMS Resources is completed. Now let us test the configuration.
      Open the asadmin utility and type the following command

      asadmin> list-jms-resources  --port  4848

Deploy the application (download) in admin server/server.

Step9:
      Click on Applications and click the jms application.

Step10:
       Click on Launch.

Step11:
       Click on the first link.

Step12:
       Enter the  message as hello glassfish and click on send the message.

Step13:
       Navigate to the following directory:

       Glassfish3\glassfish\domains\DomainName\logs\server.txt
  
       Open the server.txt file, you can see that the message is received by the Message Bean TMDB.