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Chapter 3. Getting started

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

3.1. Prerequisites
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3.2. Preparing the broker
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The example programs require a running broker with a queue named queue. 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 queue. 

    <broker-instance-dir>/bin/artemis queue create --name queue --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 Hello World
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Procedure

  1. Use Maven to build the examples by running the following command in the <install-dir>/examples 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.messaginghub.jms.example.HelloWorld

    On Windows: 

    java -cp "target\classes;target\dependency\*" org.messaginghub.jms.example.HelloWorld

The example calls createConnection() for each character of the string "Hello World", transferring one at a time. Because AMQ JMS Pool is in use, each call reuses the same underlying JMS Connection object.

Running it on Linux results in the following output. 

$ java -cp "target/classes/:target/dependency/*" org.messaginghub.jms.example.HelloWorld
2018-05-17 11:04:23,393 [main           ] - INFO  JmsPoolConnectionFactory       - Provided ConnectionFactory is JMS 2.0+ capable.
2018-05-17 11:04:23,715 [localhost:5672]] - INFO  SaslMechanismFinder            - Best match for SASL auth was: SASL-ANONYMOUS
2018-05-17 11:04:23,739 [localhost:5672]] - INFO  JmsConnection                  - Connection ID:104dfd29-d18d-4bf5-aab9-a53660f58633:1 connected to remote Broker: amqp://localhost:5672
Hello World

The source code for the example is in the <install-dir>/examples/src/main/java directory. The JNDI and logging configuration is in the <install-dir>/examples/src/main/resources directory.

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