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APACHE KARAF COOKBOOK

You're reading from   APACHE KARAF COOKBOOK Over 60 recipes to help you get the most out of your Apache Karaf deployments

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Product type Paperback
Published in Aug 2014
Publisher
ISBN-13 9781783985081
Length 260 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (12) Chapters Close

Preface 1. Apache Karaf for System Builders FREE CHAPTER 2. Making Smart Routers with Apache Camel 3. Deploying a Message Broker with Apache ActiveMQ 4. Hosting a Web Server with Pax Web 5. Hosting Web Services with Apache CXF 6. Distributing a Clustered Container with Apache Karaf Cellar 7. Providing a Persistence Layer with Apache Aries and OpenJPA 8. Providing a Big Data Integration Layer with Apache Cassandra 9. Providing a Big Data Integration Layer with Apache Hadoop 10. Testing Apache Karaf with Pax Exam Index

Using the ActiveMQ query command


A convenient feature of an embedded ActiveMQ is the ability to run commands against the broker for monitoring broker activity. The query command provides basic information about the broker.

Getting ready

In order to get started, we need to get the activemq-broker feature installed as outlined in the previous recipe. Once that is installed, we can use the following command:

activemq

After typing the command, press the Tab key. This will list out all the available ActiveMQ commands as shown in the following screenshot:

Now, just running the command is pretty boring; there is not much to see in an empty broker.

Let's get some data loaded so that we can see what is happening.

How to do it…

Now, let's start sending some data through the broker in order to make this more entertaining and realistic. This recipe has some helper classes we can use to load the broker with data:

  1. Run the mvn clean install command in the example code under the Installing Apache ActiveMQ modules...

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