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helloworld-mdb-propertysubstitution: MDB (Message-Driven Bean) Using Property Substitution

The helloworld-mdb-propertysubstitution quickstart demonstrates the use of JMS and EJB MDB, enabling property substitution with annotations.

What is it?

The helloworld-mdb-propertysubstitution quickstart demonstrates the use of JMS and EJB Message-Driven Bean in {productNameFull}.

It is based on the helloworld-mdb quickstart, but has been enhanced to enable property substitution using the @Resource and @ActivationConfigProperty annotations.

This project creates two JMS resources:

  • A queue named HELLOWORLDMDBQueue bound in JNDI as java:/${property.helloworldmdb.queue}

  • A topic named HELLOWORLDMDBTopic bound in JNDI as java:/${property.helloworldmdb.topic}

Configure the Server

You enable MDB property substitution by running JBoss CLI commands. For your convenience, this quickstart batches the commands into a enable-mdb-property-substitution.cli script provided in the root directory of this quickstart.

  1. Before you begin, make sure you do the following:

  2. Review the enable-mdb-property-substitution.cli script file in the root of this quickstart directory. This script first enables MDB annotation property substitution the ee subsystem of the server configuration file by creating an annotation-property-replacement property with a value of true. It then defines the system properties that are used in the substitution.

  3. Open a new terminal, navigate to the root directory of this quickstart, and run the following command, replacing {jbossHomeName} with the path to your server:

    $ {jbossHomeName}/bin/jboss-cli.sh --connect --file=enable-mdb-property-substitution.cli
    Note
    		 For Windows, use the {jbossHomeName}\bin\jboss-cli.bat script.

    You should see the following result when you run the script:

    The batch executed successfully

  4. Stop the {productName} server.

Review the Modified Server Configuration

After stopping the server, open the {jbossHomeName}/standalone/configuration/standalone-full.xml file and review the changes.

The <annotation-property-replacement> attribute is set to true in the ee subsystem :

<subsystem xmlns="{EESubsystemNamespace}">
    ...
    <annotation-property-replacement>true</annotation-property-replacement>
    ...
</subsystem>

The following system properties are defined and appear after the <extensions>:

<system-properties>
    <property name="property.helloworldmdb.queue" value="java:/queue/HELLOWORLDMDBPropQueue"/>
    <property name="property.helloworldmdb.topic" value="java:/topic/HELLOWORLDMDBPropTopic"/>
    <property name="property.connection.factory" value="java:/ConnectionFactory"/>
</system-properties>

Look at the {productName} 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.jboss.as.server.deployment] (MSC service thread 1-4) WFLYSRV0027: Starting deployment of "helloworld-mdb-propertysubstitution.war" (runtime-name: "helloworld-mdb-propertysubstitution.war")
...
INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-6) WFLYMSGAMQ0006: Unbound messaging object to jndi name java:/${property.helloworldmdb.queue}
INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-6) WFLYMSGAMQ0002: Bound messaging object to jndi name java:/${property.helloworldmdb.queue}
INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-8) WFLYMSGAMQ0006: Unbound messaging object to jndi name java:/${property.helloworldmdb.topic}
INFO  [org.wildfly.extension.messaging-activemq] (MSC service thread 1-2) WFLYMSGAMQ0002: Bound messaging object to jndi name java:/${property.helloworldmdb.topic}
...
INFO  [org.jboss.as.ejb3] (MSC service thread 1-2) WFLYEJB0042: Started message driven bean 'HelloWorldQueueMDB' with 'activemq-ra.rar' resource adapter
INFO  [org.jboss.as.ejb3] (MSC service thread 1-5) WFLYEJB0042: Started message driven bean 'HelloWorldQTopicMDB' with 'activemq-ra.rar' resource adapter
...
INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 88) WFLYUT0021: Registered web context: '/helloworld-mdb-propertysubstitution' for server 'default-server'
INFO  [org.jboss.as.server] (management-handler-thread - 1) WFLYSRV0010: Deployed "helloworld-mdb-propertysubstitution.war" (runtime-name : "helloworld-mdb-propertysubstitution.war")

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 {productName} 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

This script removes the system properties and sets the <annotation-property-replacement> value to false in the ee subsystem of the server configuration. You should see the following result when you run the script:

The batch executed successfully

  • Make sure you enable MDB property substitution by running the JBoss CLI commands as described above under Configure the Server. Stop the server at the end of that step.

  • Within {JBDSProductName}, make sure you define a server runtime environment that uses the standalone-full.xml configuration file.

  • Make sure you restore the server configuration when you have completed testing this quickstart.