Book Image

Quickstart Apache Axis2

By : Deepal Jayasinghe
Book Image

Quickstart Apache Axis2

By: Deepal Jayasinghe

Overview of this book

<p>Axis2 is an enterprise-ready web service engine that is very user friendly and provides web service interactions with a dynamic and flexible execution framework. <br /><br />Apache Axis2 is a core engine for web services with two implementations: Apache Axis2/Java and Apache Axis2/C. It is a complete redesign and rewrite of the widely used Apache Axis SOAP stack that builds on the lessons learned from the Apache Axis implementation of the SOAP submission to W3C. Apache Axis2 not only supports SOAP 1.1 and SOAP 1.2, but also has integrated support for the widely popular REST-style of web services. The same business logic implementation can offer both a WS-* style interface and a REST/POX style interface simultaneously.<br /><br />Apache Axis2 is more efficient, more modular, more scalable, and more XML-oriented than the older version. It is carefully designed to support the easy addition of plug-in modules that extend its functionality for features such as security and reliability. Apache Axis2 is built on Apache AXIOM, a new high performance, pull-based XML object model.<br /><br />This book will take you through the basics of web services and Axis2 to the details of Axis2&acirc;&euro;&trade;s architecture.</p>

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Quickstart Apache Axis2
Deepal Jayasinghe
May, 2008 | 180 pages
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Table of Contents (18 chapters)
Quickstart Apache Axis2
Quickstart Apache Axis2
Credits
Credits
About the Author
About the Author
About the Reviewer
About the Reviewer
Preface
Preface
Free Chapter
1
Introduction
Introduction
Web Service History
Web Services Overview
Web Services Model
Web Services Standards
Web Services Life Cycle
Apache Web Service Stack
Why Axis2?
Download and Install Axis2
Summary
2
Looking into Axis2
Looking into Axis2
Axis2 Architecture
Core Modules
Other Modules
Extensible Nature of Axis2
Summary
3
AXIOM
AXIOM
Overview and Features
AXIOM—Architecture
Working with AXIOM
Summary
4
Execution Chain
Execution Chain
Handler
Phase
Module Engagement and Dynamic Execution Chain
Special Handlers in the Chain
Summary
5
Hacking Deployment
Hacking Deployment
What's New in Axis2 Deployment?
J2EE-like Deployment Mechanism
Hot Deployment and Hot Update
Repository
Change in the Way of Deploying Handlers (Modules)
New Deployment Descriptors
Available Deployment Options
Summary
6
Information Model
Information Model
Introduction
Axis2 Static Data
AxisModule
Service Description Hierarchy
Axis2 Contexts
Summary
7
Writing an Axis2 Service
Writing an Axis2 Service
Introduction
Code-First Approach
Deploying a Service Using a Service Archive File
Contract-First Approach—Starting from WSDL
Summary
8
Writing an Axis2 Module
Writing an Axis2 Module
Introduction
Module Concept
Module Structure
Module Implementation Class
Writing the module.xml File
Deploying and Engaging the Module
Summary
9
Client API
Client API
Introduction
Blocking and Non-Blocking Invocation
Inside Axis2 Client API
Summary
10
Session Management
Session Management
Introduction
Stateless Nature of Axis2
Types of Sessions in Axis2
Session Creation and Session Destruction
Request Session Scope
SOAP Session Scope
Transport Session Scope
Application Scope
Summary
11
Contract First or Code First
Contract First or Code First
Introduction
Code-First Approach
Why Not the Code-First Approach?
Contract-First Approach: Why is it So Special?
Code-Generation Support in Axis2
Summary
12
Advanced Topics
Advanced Topics
REST—Representational State Transfer
MTOM—Message Transmission Optimization Mechanism
Axis2 ClassLoader Hierarchy
Sharing Libraries Using the Class Loader Hierarchy
Axis2 Configurator
Deploying Axis2 in Various Application Servers
Summary
Index
Index

Working with AXIOM

We can either download the AXIOM binary, or we can build the binary using the source distribution (or from the source repository). AXIOM was started as a part of Axis2, but now, it has its own release cycle. Therefore, we can either download the an AXIOM binary in AXIOM release, or we can find the AXIOM binary in the Axis2 release.

Once we have the AXIOM binary, the next step is to add that binary into our classpath (and the dependent binary files as well). Then, we can start working with AXIOM. If your application has a build system similar to Maven's, then you can add dependency to that, and let it download AXIOM JARs automatically.

Creating an AXIOM

We can create an AXIOM in three ways as shown in the following figure.We can create an AXIOM using either the Pull Event stream or the Push Event stream, or, we can create an AXIOM programatically. In this chapter, we will learn how to create an AXIOM using a Pull Event stream, as well as how to create an AXIOM programmatically...

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