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

Hot deployment and hot update


Availability is a big concern when it comes to enterprise-level applications, and in such a situation, even a fraction of time is highly valuable. Therefore, restarting a server is not a realistic option, and what is required is to update and change the system without shutting it down. This is where the hot deployment and hot update come into the picture. When your application has those features, you do not need to shut the system down in order to update the system.

Though the concepts of hot deployment and hot update are not new terminologies to the technical paradigm, these are new features in the Apache web service stack Axis.

In Axis2, hot deployment and hot update work by constantly monitoring the changes in the repository by a timer. More specifically, when the user changes the last modified date of a given file, it will treat it as a hot update. In contrast, when it finds a new file it treats it as a hot deployment. The architecture of hot deployment is...