Browse Library
Sign In Start Free Trial
Close icon Search icon
Account
Browse Library Sign In Start Free Trial

Add to playlist

Create a Playlist

Modal Close icon
You need to login to use this feature.
  • Book Overview & Buying Learning Karaf Cellar
  • Table Of Contents Toc
Learning Karaf Cellar

Learning Karaf Cellar

By : Jean Baptiste Onofre, Jean-Baptiste Onofré
5 (1)
Buy this Book
close
close
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)
close
close
close
Preface
Icon
Preface
Icon
What this book covers
Icon
What you need for this book
Icon
Who this book is for
Icon
Conventions
Icon
Reader feedback
Icon
Customer support
Lock Free Chapter
1
1. Apache Karaf – Provisioning and Clusters
Icon
1. Apache Karaf – Provisioning and Clusters
Icon
What is OSGi?
Icon
The OSGi container
Icon
Multiple Apache Karaf containers
Icon
Summary
2
2. Apache Karaf Cellar
Icon
2. Apache Karaf Cellar
Icon
Cluster topologies
Icon
Apache Karaf Cellar architecture
Icon
Apache Karaf Cellar installation and first commands
Icon
Cluster resources
Icon
Summary
3
3. Hazelcast
Icon
3. Hazelcast
Icon
What is Hazelcast?
Icon
Distributed cluster resource states
Icon
Replicas/Backup
Icon
Networks
Icon
Summary
4
4. Cluster Groups
Icon
4. Cluster Groups
Icon
Managing cluster groups
Icon
Targeting provisioning
Icon
Summary
5
5. Producers, Consumers, Handlers, Listeners, and Synchronizers
Icon
5. Producers, Consumers, Handlers, Listeners, and Synchronizers
Icon
The event producer
Icon
The event consumer
Icon
Event handlers
Icon
Listeners and synchronizers
Icon
Summary
6
6. The Filtering of Cluster Events
chevron up
Icon
6. The Filtering of Cluster Events
Icon
The configuration of the filters
Icon
Resources
Icon
Blacklist and whitelist
Icon
Inbound and outbound
Icon
Regex and event identification
Icon
The default filter configuration
Icon
Summary
7
7. DOSGi
Icon
7. DOSGi
Icon
What is Cellar DOSGi?
Icon
The API bundle
Icon
The service bundle
Icon
The client bundle
Icon
Summary
8
8. Cellar and Camel
Icon
8. Cellar and Camel
Icon
The communication between remote routes
Icon
Caching with a distributed map
Icon
Summary
9
9. Roadmap
Icon
9. Roadmap
Icon
HTTP load balancing and session clustering
Icon
Clustering a log service
Icon
Summary
10
Index
Icon
Index

Regex and event identification

Finally, we have to specify the cluster event. The purpose is to allow (whitelist) or block (blacklist) specific cluster events. For instance, we want to block the following:

  • The cluster event that contains a change in the feature named my-feature

  • The cluster event that contains a change in the bundle named my-bundle

So, we have to identify and declare the cluster event. To identify a cluster event, we can use the following:

  • The event identifier can be used; for instance, org.apache.karaf.cellar.groups identifies the configuration's cluster event (PID).

  • A regular expression (regex) or glob based on the event identifier can be used. Declaring events using the full qualified name can be tedious. The usage of a regex is much faster. For instance, org.apache.karaf.cellar.* identified all the configuration cluster events containing PIDs.

  • * selects all cluster events.

  • The none keyword is a reserved keyword to not select any cluster event.

The identification depends on...

CONTINUE READING
83
Tech Concepts
36
Programming languages
73
Tech Tools
Icon Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Icon Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
Icon 50+ new titles added per month and exclusive early access to books as they are being written.
Learning Karaf Cellar
End of Section 6
Next Section
notes
bookmark Notes and Bookmarks search Search in title playlist Add to playlist font-size Font size

Change the font size

margin-width Margin width

Change margin width

day-mode Day/Sepia/Night Modes

Change background colour

Close icon Search
Country selected
Close icon Your notes and bookmarks

Confirmation

Modal Close icon
claim successful
Order Page Read Now

Buy this book with your credits?

Modal Close icon
Are you sure you want to buy this book with one of your credits?
Close
YES, BUY

Submit Your Feedback

Modal Close icon
Modal Close icon
Modal Close icon