Book Image

Apache Axis2 Web Services, 2nd Edition

By : Deepal Jayasinghe, Afkham Azeez
Book Image

Apache Axis2 Web Services, 2nd Edition

By: Deepal Jayasinghe, Afkham Azeez

Overview of this book

<p>Web services are gaining popularity and have become one of the major techniques for application integration. Due to the flexibility and advantages of using web services, you want to enable Web service support to your applications. This book is your gateway to learning all you need to know about the Apache Axis2 web service framework and its hands on implementation. <br /><br />Apache Axis2 Web Services, 2nd Edition is your comprehensive guide to implementing this incredibly powerful framework in practice. It gives you precisely what you need to know to develop a detailed practical understanding of this popular, modular and reliable web service framework.<br /><br />This book starts with a short and relevant introduction about the Axis2 1.5 framework and then plunges you straight into its architectural model.</p> <p>Learn to use and develop your own modules. Write a services.xml file so efficiently that you'll be creating more complex applications (rather than just POJOs) in no time.</p> <p>Learn how straightforward it really is to turn a Java class into a web service in Axis2. Experiment with different types of sessions in Axis2. Learn different patterns of Enterprise deployment. Ensure reliability in your web service - a major concern in most enterprise applications - with minimum impact on performance.<br /><br />This book will journey you through all this and more, giving you exactly what you need to learn Axis2 1.5 in the easiest way possible and create secure, reliable, and easy-to-use web services efficiently and systematically.</p>
Table of Contents (22 chapters)
Apache Axis2 Web Services
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
15
Building a Secure Reliable Web Service
Index

Membership schemes


The term membership scheme refers to the manner in which group membership is managed in a cluster. A cluster consists of several processes, and each of these processes is known as a member. In the context of Axis2, each member is an Axis2 process. The Axis2 clustering implementations support several membership schemes. Next, we will take a look at the three membership schemes supported by Axis2, and how the clusters are configured to support these membership schemes. We will be looking at:

  • Static membership

  • Dynamic membership

  • Hybrid membership

Static membership

In this scheme, only a defined set of members can be in a group. The Group Membership Service (GMS) will detect members joining or leaving the group. External members cannot join the group. Each node may obtain group member details from a central repository or configuration file.

In the figure, S1 up to S5 are static members. These static members can join or leave the group at any time. However, these members need to...