Chapter 3. Getting started

This chapter guides you through a simple exercise to help you get started using AMQ OpenWire JMS.

3.1. Prerequisites

3.2. Preparing the broker

The example programs require a running broker with a queue named exampleQueue. Follow these steps to define the queue and start the broker:

Procedure

  1. Install the broker.
  2. Create a broker instance. Enable anonymous access.

  3. Start the broker instance and check the console for any critical errors logged during startup. 

    $ <broker-instance-dir>/bin/artemis run
...
14:43:20,158 INFO  [org.apache.activemq.artemis.integration.bootstrap] AMQ101000: Starting ActiveMQ Artemis Server
...
15:01:39,686 INFO  [org.apache.activemq.artemis.core.server] AMQ221020: Started Acceptor at 0.0.0.0:5672 for protocols [AMQP]
...
15:01:39,691 INFO  [org.apache.activemq.artemis.core.server] AMQ221007: Server is now live

  4. Use the artemis queue command to create a queue called exampleQueue. 

    <broker-instance-dir>/bin/artemis queue create --name exampleQueue --auto-create-address --anycast

    You are prompted to answer a series of questions. For yes or no questions, type N. Otherwise, press Enter to accept the default value.

3.3. Running your first example

Procedure

  1. Use Maven to build the examples by running the following command in the <install-dir>/examples/protocols/openwire/queue directory. 

    mvn clean package dependency:copy-dependencies -DincludeScope=runtime -DskipTests

    The addition of dependency:copy-dependencies results in the dependencies being copied into the target/dependency directory.

  2. Use the java command to run the example.

    On Linux or UNIX: 

    java -cp "target/classes:target/dependency/*" org.apache.activemq.artemis.jms.example.QueueExample

    On Windows: 

    java -cp "target\classes;target\dependency\*" org.apache.activemq.artemis.jms.example.QueueExample

The example creates a consumer and producer for a queue named exampleQueue. It sends a text message and then receives it back, printing the received message to the console.

Running it on Linux results in the following output. 

$ java -cp "target/classes:target/dependency/*" org.apache.activemq.artemis.jms.example.QueueExample
Sent message: This is a text message
Received message: This is a text message

The source code for the example is in the <install-dir>/examples/protocols/openwire/queue/src directory. Additional examples are available in the <install-dir>/examples/protocols/openwire directory.