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>

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Apache Axis2 Web Services, 2nd Edition
Deepal Jayasinghe | Afkham Azeez
Feb, 2011 | 308 pages
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Table of Contents (22 chapters)
Apache Axis2 Web Services
Apache Axis2 Web Services
Credits
Credits
About the Authors
About the Authors
About the Reviewers
About the Reviewers
www.PacktPub.com
www.PacktPub.com
Preface
Preface
Free Chapter
1
Apache Web Services and Axis2
Apache Web Services and Axis2
Service Oriented Architecture (SOA)
Web service overview
Web services model
Web services lifecycle
Apache Web Service stack
Why Axis2?
Downloading and installing Apache Axis2
Summary
2
Looking inside Axis2
Looking inside Axis2
Axis2 architecture
Core modules
Other modules
Extensible nature of Axis2
Summary
3
Axis 2 XML Model (AXIOM)
Axis 2 XML Model (AXIOM)
Overview of AXIOM and its features
Working with AXIOM
Summary
4
Execution Chain
Execution Chain
Handler
Phase
Phase rules
Flow
Module engagement and dynamic execution chain
Summary
5
Deployment Model
Deployment Model
What is new in Axis2 deployment?
Hot deployment and hot update
Repository
Change in the way of deploying handlers (modules)
Deployment descriptors
Summary
6
Information Model
Information Model
Axis2 static data
Service description hierarchy
Axis2 contexts
Summary
7
Writing an Axis2 Service
Writing an Axis2 Service
Creating a web service
The code first approach
Contract first approach – starting from the WSDL
Summary
8
Writing an Axis2 Module
Writing an Axis2 Module
Brief history of the Axis2 module
Summary
9
The Client API
The Client API
Web service client
Summary
10
Session Management
Session Management
Stateless nature of Axis2
The available type of sessions in Axis2
Session initializing and session invalidating
Request session scope
SOAP session scope
Transport session scope
Application scope
Summary
11
Developing JAX-WS Web Services
Developing JAX-WS Web Services
Writing a simple JAX-WS web service
JAX-WS annotations
JSR 224 (JAX-WS) annotations
JSR 222 (JAXB) annotations
JSR 250 (Common Annotations)
Code first service development with JAX-WS
Contract first development with JAX-WS
Summary
12
Axis2 Clustering
Axis2 Clustering
Setting up a simple Axis2 cluster
Writing a highly available clusterable web service
Stateless Axis2 Web Services
Setting up a failover cluster
Increasing horizontal scalability
Setting up and configuring Axis2 clusters in production
Membership schemes
Cluster management
Highly available load balancing
The Axis2 clustering management API
Summary
13
Enterprise Integration Patterns
Enterprise Integration Patterns
Apache Synapse
WSO2 ESB
OpenESB
Protocol bridging
External authentication and authorization
Dynamic routing combined with auditing
Event Driven Architecture (EDA) with Master Data Management (MDM) for Integrating Legacy Systems
Push and pull
Fault tolerant autoscaling with dynamic load balancing
References
Summary
14
Axis2 Advanced Features and Usage
Axis2 Advanced Features and Usage
Representational State Transfer (REST)
Message Transmission Optimization Mechanism (MTOM)
Axis2 configurator
Deploying Axis2 in various application servers
Asynchronous web services with Axis2
Summary
15
Building a Secure Reliable Web Service
Building a Secure Reliable Web Service
Reliable web services
Summary
Index
Index

About the Authors

Deepal Jayasinghe is a Computer Science PhD student at Georgia Institute of Technology and he is affiliated with Center for Experimental Research in Computer Systems. Prior to joining Georgia Tech, he was a Technical Lead at WSO2 Inc., an open source software development company that creates middleware platforms for web services. Deepal has over six years of experience with SOA and web services in addition to being a contributing member of the Apache Axis2 project since its inception. He is a key architect and developer of the Apache Axis2 Web service project and has led a number of releases. In addition to Axis2, he has made major contributions to Apache Synapse, Apache Axiom, and Apache XMLSchema projects.

Deepal has written more than 30 technical magazine articles, written research papers, and has delivered speeches at various SOA and web services conferences. He is an Apache Member and PMC members at several Apache projects. His expertise lies mainly in distributed computing, SOA and web services, Cloud computing, and performance analysis. Deepal holds a B.Sc. Engineering degree from the University of Moratuwa, Sri Lanka. He can be reached at .

First of all, I want to thank Apache Axis2 developers and the Axis2 community who has contributed towards making this web services framework a world renowned success in a relatively short period of time. Thank you!

I owe countless thanks to my dear wife and parents for always being there and supporting me in so many ways. This book would not have been possible without everything that they have done for me. Special thanks to Srinath Hemapani, Ajith Ranabahu, Eran Chinthaka, Sanjiva Weerawarana, Davanam Sirinivas, Glen Daniels, Paul Fremantle, Chathura Herath, Jaliya Ekanayake, and all the other key members of the Axis2 team without whose tremendous contributions and wisdom, Axis2 would not have been possible. For the creation of this work, I am blessed with a strong team of technical reviewers and superior editorial and production professionals from Packt Publishing. My sincere thanks to all of you for your tireless efforts.

Afkham Azeez is a Member, Project Management Committee (PMC) member, and a committer of the Apache Software Foundation. He works as a Senior Software Architect and Senior Manager, Platform as a Service, at WSO2 Inc. His specializations include distributed computing, Cloud computing, SOA and J2EE technologies. He is a long time open source contributor and is the author of the clustering implementation for Apache Axis2.

Azeez holds a Masters degree in Computer Science, specializing in Software Architecture and B.Sc. first class honors degree in Computer Science and Engineering, from the University of Moratuwa, Sri Lanka. He is a regular presenter at many open source conferences including the Apache Conferences.

Azeez is a petrolhead and an active member of the AutoLanka forum. He enjoys a game of basketball and also loves spending time with his three kids.

I would like to express profound gratitude to the open source communities backing the Apache Axis, Apache Web Services, and Apache Synapse projects. Their contributions were the foundation upon which work was built.

I would like to thank Asanka Abeysinghe, Director of Solutions Architecture at WSO2, and SOA solutions and patterns expert, for providing, guidance and some content for the Enterprise Integration Patterns chapter.

I am as ever indebted to my parents specially, for their love and support throughout my life. I also wish to thank my wife, who supported me throughout my work.

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