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Chapter 3. Getting Started

This chapter guides you through a simple exercise to help you get started using AMQ JavaScript. Before starting, make sure you have completed the steps in the Chapter 2, Installation chapter for your environment.

3.1. Preparing the Broker

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

  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 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 examples.

    $ BROKER_INSTANCE_DIR/bin/artemis queue create --name examples --auto-create-address --anycast

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

3.2. Running Hello World

The Hello World example sends a message to the examples queue on the broker and then fetches it back. On success it prints Hello World! to the console.

Using your configured installation environment, run the helloworld.js example.

$ cd nodejs-rhea-VERSION/node_modules/rhea/examples
$ node helloworld.js
Hello World!