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Chapter 3. Getting started
This chapter guides you through the steps to set up your environment and run a simple messaging program.
3.1. Prerequisites
- To build the example, Maven must be configured to use the Red Hat repository or a local repository.
- You must install the examples.
-
You must have a message broker listening for connections on
localhost. It must have anonymous access enabled. For more information, see Starting the broker. -
You must have a queue named
exampleQueue. For more information, see Creating a queue.
3.2. Running your first example
The example creates a consumer and producer for a queue named exampleQueue. It sends a text message and then receives it back, printing the received message to the console.
Procedure
Use Maven to build the examples by running the following command in the
<install-dir>/examples/features/standard/queuedirectory.mvn clean package dependency:copy-dependencies -DincludeScope=runtime -DskipTests
$ mvn clean package dependency:copy-dependencies -DincludeScope=runtime -DskipTestsCopy to Clipboard Copied! Toggle word wrap Toggle overflow 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.apache.activemq.artemis.jms.example.QueueExample
$ java -cp "target/classes:target/dependency/*" org.apache.activemq.artemis.jms.example.QueueExampleCopy to Clipboard Copied! Toggle word wrap Toggle overflow On Windows:
> java -cp "target\classes;target\dependency\*" org.apache.activemq.artemis.jms.example.QueueExample
> java -cp "target\classes;target\dependency\*" org.apache.activemq.artemis.jms.example.QueueExampleCopy to Clipboard Copied! Toggle word wrap Toggle overflow
For example, running it on Linux results in the following output:
java -cp "target/classes:target/dependency/*" org.apache.activemq.artemis.jms.example.QueueExample
$ java -cp "target/classes:target/dependency/*" org.apache.activemq.artemis.jms.example.QueueExample
Sent message: This is a text message
Received message: This is a text message
The source code for the example is in the <install-dir>/examples/features/standard/queue/src directory. Additional examples are available in the <install-dir>/examples/features/standard directory.
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