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

Axis2 architecture


Axis2 uses modular architecture and the advantages associated with it. In general, modular architecture allows any of the components to be upgraded or replaced independently as the requirements or the technologies change. Axis2 consists of a set of core as well as a set of non-core modules. In addition, the Axis2 core system is a pure SOAP-processing system with no JAX-PRC concept burnt into the core. Every message coming into the system has to be transformed into a SOAP message before it is handed over to the core engine. An incoming message can either be a SOAP message or a non-SOAP message (REST, JSON). But at the transport level, it will be converted into a SOAP message.

When Axis2 was designed, the following key rules were incorporated into its architecture. These rules were mainly applied to achieve a highly flexible and extensible SOAP processing engine:

  • Separation of logic and state to provide stateless processing mechanism. This is because web services are stateless...