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  • Book Overview & Buying APACHE KARAF COOKBOOK
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APACHE KARAF COOKBOOK

APACHE KARAF COOKBOOK

By : Nierbeck, Jamie Goodyear
3.8 (4)
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APACHE KARAF COOKBOOK

APACHE KARAF COOKBOOK

3.8 (4)
By: Nierbeck, Jamie Goodyear
Buy this Book

Overview of this book

This book is intended for developers who have some familiarity with Apache Karaf and who want a quick reference for practical, proven tips on how to perform common tasks such as configuring Pax modules deployed in Apache Karaf, Extending HttpService with Apache Karaf. You should have working knowledge of Apache karaf, as the book provides a deeper understanding of the capabilities of Apache Karaf.
Table of Contents (12 chapters)
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Preface
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Preface
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What this book covers
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What you need for this book
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Who this book is for
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Conventions
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Reader feedback
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Customer support
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1
1. Apache Karaf for System Builders
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1. Apache Karaf for System Builders
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Introduction
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Configuring production-ready logging in Apache Karaf
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Creating our own custom Karaf command using a Maven archetype
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Branding the Apache Karaf console
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Deploying applications as a feature
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Using JMX to monitor and administer Apache Karaf
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Reconfiguring SSH access to Apache Karaf
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Installing Apache Karaf as a service
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Setting up Apache Karaf for high availability
2
2. Making Smart Routers with Apache Camel
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2. Making Smart Routers with Apache Camel
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Introduction
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Installing Apache Camel modules into Apache Karaf
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Listing Camel Contexts in Karaf
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Displaying Camel Context information in Karaf
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Starting and stopping Camel Contexts in Karaf
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Listing routes in Karaf
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Displaying route information in Karaf
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Starting, stopping, suspending, and resuming routes in Karaf
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Listing endpoints in Karaf
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Making a pure Java-based Camel Router for deployment in Karaf
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Creating a Blueprint-based Camel Router for deployment in Karaf
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Adding Configuration Admin to a Blueprint-based Camel Router
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Creating a managed service factory implementation of a Camel Router
3
3. Deploying a Message Broker with Apache ActiveMQ
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3. Deploying a Message Broker with Apache ActiveMQ
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Introduction
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Installing Apache ActiveMQ modules into Apache Karaf
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Using the ActiveMQ query command
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Using the ActiveMQ list command
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Using the ActiveMQ dstat command
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Using the ActiveMQ purge command
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Using the JMS connection factory commands
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Using the JMS send command
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Using the JMS browse command
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Configuring and deploying a master/slave broker with Apache Karaf
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Configuring and deploying a Network of Brokers with Apache Karaf
4
4. Hosting a Web Server with Pax Web
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4. Hosting a Web Server with Pax Web
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Introduction
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Installing Pax modules in Apache Karaf
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Installing extended Http Service in Apache Karaf
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Configuring Pax Web modules deployed in Apache Karaf
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Building a Http Service project to host in Apache Karaf
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Building a Http Service with the Whiteboard pattern in Apache Karaf
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Building an application with custom HttpContext with Apache Karaf
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Building a standard web project to host in Apache Karaf
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Configuring security for a web application in Apache Karaf
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Binding a web project to a specific host in Apache Karaf
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Building a Servlet 3.0 annotated web application with Apache Karaf
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Creating a CDI web application with Apache Karaf
5
5. Hosting Web Services with Apache CXF
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5. Hosting Web Services with Apache CXF
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Introduction
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Installing Apache CXF modules in Apache Karaf
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Using the CXF list-endpoints command
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Using the CXF stop and start commands
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Building and deploying a RESTful service in Karaf
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Building and deploying a Camel CXF web service in Karaf
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6. Distributing a Clustered Container with Apache Karaf Cellar
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6. Distributing a Clustered Container with Apache Karaf Cellar
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Introduction
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Installing Apache Karaf Cellar modules in Apache Karaf
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Using Apache Karaf Cellar commands
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Building and deploying a distributed architecture with Cellar
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7. Providing a Persistence Layer with Apache Aries and OpenJPA
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7. Providing a Persistence Layer with Apache Aries and OpenJPA
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Introduction
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Installing OpenJPA modules in Apache Karaf
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Installing Apache Aries JTA modules in Apache Karaf
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Building a project with a persistence layer for deployment in Karaf
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Building a project with a persistence layer and transaction support for deployment in Karaf
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8. Providing a Big Data Integration Layer with Apache Cassandra
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8. Providing a Big Data Integration Layer with Apache Cassandra
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Introduction
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Installing Cassandra client bundles in Apache Karaf
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Modeling data with Apache Cassandra
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Building a project with a persistence layer for deployment in Karaf
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9. Providing a Big Data Integration Layer with Apache Hadoop
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9. Providing a Big Data Integration Layer with Apache Hadoop
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Introduction
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Starting a standalone Hadoop cluster
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Installing Hadoop client bundles in Apache Karaf
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Accessing Apache Hadoop from Karaf
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Adding commands that talk to HDFS for deployment in Karaf
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10. Testing Apache Karaf with Pax Exam
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10. Testing Apache Karaf with Pax Exam
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Introduction
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Setting up a Pax Exam test environment
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Testing Apache Karaf features
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Testing commands with Apache Karaf
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Coverage with Apache Karaf Pax Exam tests
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Testing Apache Camel with Blueprint and Apache Karaf
11
Index
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Index

Using the ActiveMQ dstat command

The dstat command is a convenient way to see queue message statistics at a glance. It will list out the queues with queue size, the number of producers and consumers, the number of messages enqueued and dequeued, and the percentage of memory used.

Getting ready

In order to get started, we need to get the activemq-broker feature installed.

Tip

If you have run any previous recipes, a good way to get a clean environment is to stop Karaf, delete the data directory, and restart. This will clean up any data from the previous runs. Remember to reinstall the activemq-broker feature after restarting.

As an example, let's run the activemq:dstat command, as shown in the following screenshot.

Not very impressive. Without data, these commands can be pretty boring. In the previous screenshot, we can see that we have one queue defined at this moment with no message, no producers, and no consumers. So, let's get some data loaded to see what is happening.

How to do it…

We need to...

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APACHE KARAF COOKBOOK
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