helloworld-mdb: Helloworld Using an MDB (Message-Driven Bean)

Author: Serge Pagop, Andy Taylor, Jeff Mesnil
Level: Intermediate
Technologies: JMS, EJB, MDB
Summary: The helloworld-mdb quickstart uses JMS and EJB Message-Driven Bean (MDB) to create and deploy JMS topic and queue resources in JBoss EAP.
Target Product: JBoss EAP
Source: https://github.com/jboss-developer/jboss-eap-quickstarts/

What is it?

The helloworld-mdb quickstart demonstrates the use of JMS and EJB Message-Driven Bean in Red Hat JBoss Enterprise Application Platform.

This project creates two JMS resources:

• A queue named HELLOWORLDMDBQueue bound in JNDI as java:/queue/HELLOWORLDMDBQueue
• A topic named HELLOWORLDMDBTopic bound in JNDI as java:/topic/HELLOWORLDMDBTopic

System requirements

The application this project produces is designed to be run on Red Hat JBoss Enterprise Application Platform 7 or later.

All you need to build this project is Java 8.0 (Java SDK 1.8) or later and Maven 3.1.1 or later. See Configure Maven for JBoss EAP 7 to make sure you are configured correctly for testing the quickstarts.

Use of EAP7_HOME

In the following instructions, replace EAP7_HOME with the actual path to your JBoss EAP installation. The installation path is described in detail here: Use of EAP7_HOME and JBOSS_HOME Variables.

Start the JBoss EAP Server with the Full Profile

1. Open a command prompt and navigate to the root of the JBoss EAP directory.

2. The following shows the command line to start the server with the full profile:

    For Linux:   EAP7_HOME/bin/standalone.sh -c standalone-full.xml
    For Windows: EAP7_HOME\bin\standalone.bat -c standalone-full.xml
   

Build and Deploy the Quickstart

1. Make sure you have started the JBoss EAP server as described above.

2. Open a command prompt and navigate to the root directory of this quickstart.

3. Type this command to build and deploy the archive:

    mvn clean install wildfly:deploy
   

4. This will deploy target/jboss-helloworld-mdb.war to the running instance of the server. Look at the JBoss EAP console or Server log and you should see log messages corresponding to the deployment of the message-driven beans and the JMS destinations:

    ...
    INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-4) WFLYMSGAMQ0002: Bound messaging object to jndi name java:/queue/HELLOWORLDMDBQueue
    INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-2) WFLYMSGAMQ0002: Bound messaging object to jndi name java:/topic/HELLOWORLDMDBTopic
    ....
    INFO  [org.apache.activemq.artemis.core.server] (ServerService Thread Pool -- 67) AMQ221003: trying to deploy queue jms.queue.HelloWorldMDBQueue
    ...
    INFO  [org.apache.activemq.artemis.core.server] (ServerService Thread Pool -- 12) AMQ221003: trying to deploy queue jms.topic.HelloWorldMDBTopic
    INFO  [org.jboss.as.ejb3] (MSC service thread 1-7) WFLYEJB0042: Started message driven bean 'HelloWorldQueueMDB' with 'activemq-ra.rar' resource adapter
    INFO  [org.jboss.as.ejb3] (MSC service thread 1-6) WFLYEJB0042: Started message driven bean 'HelloWorldQTopicMDB' with 'activemq-ra.rar' resource adapter
   

Access the application

The application will be running at the following URL: http://localhost:8080/jboss-helloworld-mdb/ and will send some messages to the queue.

To send messages to the topic, use the following URL: http://localhost:8080/jboss-helloworld-mdb/HelloWorldMDBServletClient?topic

Investigate the Server Console Output

Look at the JBoss EAP console or Server log and you should see log messages like the following:

INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-9 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 5
INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-6 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 1
INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-7 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 4
INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-5 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 2
INFO  [class org.jboss.as.quickstarts.mdb.HelloWorldQueueMDB] (Thread-4 (ActiveMQ-client-global-threads-1189700957)) Received Message from queue: This is message 3

Undeploy the Archive

1. Make sure you have started the JBoss EAP server as described above.

2. Open a command prompt and navigate to the root directory of this quickstart.

3. When you are finished testing, type this command to undeploy the archive:

    mvn wildfly:undeploy
   

Run the Quickstart in Red Hat JBoss Developer Studio or Eclipse

You can also start the server and deploy the quickstarts or run the Arquillian tests from Eclipse using JBoss tools. For general information about how to import a quickstart, add a JBoss EAP server, and build and deploy a quickstart, see Use JBoss Developer Studio or Eclipse to Run the Quickstarts.

NOTE: Within JBoss Developer Studio, be sure to define a server runtime environment that uses the standalone-full.xml configuration file.

Debug the Application

If you want to debug the source code of any library in the project, run the following command to pull the source into your local repository. The IDE should then detect it.

mvn dependency:sources