Chapter 3. Getting started
This chapter guides you through a simple exercise to help you get started using AMQ JMS Pool.
3.1. Prerequisites
- The Hello World example program is located in the AMQ JMS Pool zip file. To get started, you must install the zip file.
- To build the example, Maven must be configured to use the Red Hat repository or a local repository.
3.2. Preparing the broker
The example programs require a running broker with a queue named queue. 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 liveUse the
artemis queuecommand to create a queue calledqueue.<broker-instance-dir>/bin/artemis queue create --name queue --auto-create-address --anycastYou 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
Procedure
Use Maven to build the examples by running the following command in the
<install-dir>/examplesdirectory.mvn clean package dependency:copy-dependencies -DincludeScope=runtime -DskipTests
The addition of
dependency:copy-dependenciesresults in the dependencies being copied into thetarget/dependencydirectory.Use the
javacommand 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.
