5.4. Tutorial I: JAAS Authentication

Overview

This tutorial shows you how to communicate with the AMQ broker using example producer and consumer JMS clients. The JMS clients must first be modified, however, to provide the requisite username/password JMS credentials.

Prerequisites

The following prerequisites are needed for this tutorial:
  • Apache Ant—Apache Ant is a free, open source build tool from Apache. You can download the latest version from http://ant.apache.org/bindownload.cgi (minimum is 1.8).
  • Apache ActiveMQ installation—the standalone installation of Apache ActiveMQ has some demonstration code that is not available in Red Hat AMQ. The Apache ActiveMQ distribution is provided in the InstallDir/extras directory in an archive format. Uncompress and extract the archive to a convenient installation location, ActiveMQInstallDir.

Tutorial steps

To test the example JMS clients with AMQ, perform the following steps:
  1. the section called “Install the consumer and producer JMS clients”.
  2. the section called “Customize the users.properties file”.
  3. the section called “Start the container”.
  4. the section called “Run the consumer with JMS credentials”.
  5. the section called “Run the producer with JMS credentials”.

Install the consumer and producer JMS clients

The Apache ActiveMQ distribution is provided in the InstallDir/extras directory in an archive format. Uncompress and extract the archive to a convenient installation location, ActiveMQInstallDir (the consumer and producer clients can be accessed by running ant targets under the ActiveMQInstallDir/examples/openwire/swissarmy directory).

Customize the users.properties file

The karaf JAAS realm can be administered by editing the InstallDir/etc/users.properties file, where the file contains entries in the following format: 
Username=Password,Role1,Role2,...
For example, the default users.properties file shows a sample entry (which is commented out) for the user, admin, with password, admin, as follows: 
#admin=admin,admin
Customize the users.properties file by adding at least one user entry with the Administrator role. For example: 
Username=Password,Administrator

Start the container

Change directory to InstallDir/bin and enter the following command: 
./amq

Run the consumer with JMS credentials

To connect the consumer tool to the tcp://localhost:61616 endpoint, change directory to ActiveMQInstallDir/examples/openwire/swissarmy and enter the following command: 
ant consumer -Duser=admin -Dpassword=admin -Durl=tcp://localhost:61616 -Dmax=100
You should see some output like the following: 
Buildfile: build.xml
init:
compile:
consumer:
     [echo] Running consumer against server at $url = tcp://localhost:61616 for subject $subject = TEST.FOO
     [java] Connecting to URL: tcp://localhost:61616 (admin:admin)
     [java] Consuming queue: TEST.FOO
     [java] Using a non-durable subscription
     [java] Running 1 parallel threads
     [java] [Thread-2] We are about to wait until we consume: 100 message(s) then we will shutdown

Run the producer with JMS credentials

To connect the producer tool to the tcp://localhost:61616 endpoint, open a new command prompt, change directory to ActiveMQInstallDir/examples/openwire/swissarmy and enter the following command: 
ant producer -Duser=admin -Dpassword=admin -Durl=tcp://localhost:61616 -Dmax=100
In the window where the consumer tool is running, you should see some output like the following: 
[java] [Thread-2] Received: 'Message: 0 sent at: Mon Mar 18 17:12:16 CET 2013  ...' (length 1000)
[java] [Thread-2] Received: 'Message: 1 sent at: Mon Mar 18 17:12:16 CET 2013  ...' (length 1000)
[java] [Thread-2] Received: 'Message: 2 sent at: Mon Mar 18 17:12:16 CET 2013  ...' (length 1000)
[java] [Thread-2] Received: 'Message: 3 sent at: Mon Mar 18 17:12:16 CET 2013  ...' (length 1000)
[java] [Thread-2] Received: 'Message: 4 sent at: Mon Mar 18 17:12:16 CET 2013  ...' (length 1000)