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  • Book Overview & Buying Learning Karaf Cellar
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Learning Karaf Cellar

Learning Karaf Cellar

By : Jean Baptiste Onofre, Jean-Baptiste Onofré
5 (1)
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Learning Karaf Cellar

Learning Karaf Cellar

5 (1)
By: Jean Baptiste Onofre, Jean-Baptiste Onofré
Buy this Book

Overview of this book

This book is a tutorial written with a step-by-step approach to help you implement an optimum clustering solution in Apache Karaf Cellar quickly and efficiently. If you are new to Karaf and want to install and manage multiple Karaf instances by farming or clustering, then this book is for you. If you are a Java developer or a system administrator with basic knowledge of Karaf, you can use this book as a guide. Some background knowledge of OSGi and/or Karaf would be preferred but is not mandatory.
Table of Contents (11 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 – Provisioning and Clusters
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1. Apache Karaf – Provisioning and Clusters
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What is OSGi?
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The OSGi container
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Multiple Apache Karaf containers
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Summary
2
2. Apache Karaf Cellar
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2. Apache Karaf Cellar
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Cluster topologies
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Apache Karaf Cellar architecture
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Apache Karaf Cellar installation and first commands
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Cluster resources
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Summary
3
3. Hazelcast
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3. Hazelcast
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What is Hazelcast?
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Distributed cluster resource states
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Replicas/Backup
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Networks
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Summary
4
4. Cluster Groups
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4. Cluster Groups
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Managing cluster groups
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Targeting provisioning
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Summary
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5. Producers, Consumers, Handlers, Listeners, and Synchronizers
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5. Producers, Consumers, Handlers, Listeners, and Synchronizers
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The event producer
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The event consumer
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Event handlers
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Listeners and synchronizers
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Summary
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6. The Filtering of Cluster Events
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6. The Filtering of Cluster Events
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The configuration of the filters
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Resources
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Blacklist and whitelist
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Inbound and outbound
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Regex and event identification
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The default filter configuration
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Summary
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7. DOSGi
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7. DOSGi
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What is Cellar DOSGi?
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The API bundle
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The service bundle
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The client bundle
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Summary
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8. Cellar and Camel
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8. Cellar and Camel
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The communication between remote routes
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Caching with a distributed map
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Summary
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9. Roadmap
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9. Roadmap
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HTTP load balancing and session clustering
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Clustering a log service
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Summary
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Index
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Index

Networks

In the previous sections, we saw the Hazelcast resources used by Cellar to format and transport cluster events. The transport relays to the network (the wire). Hazelcast provides the configuration of the network that we can leverage in Cellar. In this section, we will see how to configure Cellar node discovery, how to secure the communication between the nodes, and how to support IPv6.

Multiple clusters

On the same network, you may want to define multiple Cellar clusters, especially when you use node discovery. A Cellar cluster is identified by a name and password in the etc/hazelcast.xml configuration file. You can separate your clusters in a simple way (for instance, per environment) using the following code:

<hazelcast>
    <group>
        <name>dev</name>
        <password>dev-pass</password>
    </group>
    ...
</hazelcast>

TCP/IP

If multicasting (which is the default) is not the preferred way of discovering the nodes, then you can...

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