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

The helloworld-mdb quickstart uses JMS and EJB Message-Driven Bean (MDB) to create and deploy JMS topic and queue resources in WildFly.

What is it?

The helloworld-mdb quickstart demonstrates the use of JMS and EJB Message-Driven Bean in WildFly Application Server.

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

Look at the WildFly 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/{artifactId}/ and will send some messages to the queue.

To send messages to the topic, use the following URL: http://localhost:8080/{artifactId}/HelloWorldMDBServletClient?topic

Investigate the Server Console Output

Look at the WildFly 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
Note
 Within JBoss Developer Studio, make sure you define a server runtime environment that uses the standalone-full.xml configuration file.