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Chapter 3. Getting started
This chapter guides you through a simple exercise to help you get started using AMQ JavaScript.
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
- Install the broker.
- Create a broker instance. Enable anonymous access.
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
Use the
artemis queuecommand to create a queue calledexamples.<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 your configured installation environment, run the helloworld.js example.
$ cd nodejs-rhea-<version>/node_modules/rhea/examples $ node helloworld.js Hello World!
