Chapter 3. Getting started

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

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:

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 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 or 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 a new terminal window, change directory to the AMQ Ruby examples directory and run the helloworld.rb example.

$ cd /usr/share/proton-0.27.0/examples/ruby/
$ ruby helloworld.rb amqp://127.0.0.1 examples
Hello World!