Introduction to Web Services

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Delivery Options

  • Private Onsite Training
    • Price: $4795 for up to 3 students. (Additional students subject to a nominal fee)
    • Contact an account manager to schedule an onsite delivery and discuss customization options.
  • Public Training
    • Price: $795 per student
    • There are currently no upcoming public deliveries scheduled. You can use our online contact form to add your name to our wait list.

Class Overview

The goal of web services is to enable heterogeneous software systems to interoperate using XML and well-known protocols such as HTTP.

In this one-day course, students learn a combination of web service fundamentals and the basics of the Axis2 platform. Web service topics such as SOAP and WSDL are covered from both client and server implementation perspectives. Students will learn how to create a Java™ SE web service client by generating client helper code from a WSDL file. They will then learn how to create and deploy Java web services to Apache Tomcat by using either Java code or WSDL as the starting point.

Audience: Java programmers who need to create distributed applications using Axis2.

Prerequisites: Introduction to XML and Java Programming.

Class Length: 1 day

Class Objectives

  • Communicate between clients and web services with SOAP messages
  • Describe web service operations with WSDL.
  • Create web service clients and services with the Apache Axis2 web service framework
  • Automatically convert Java objects to XML with the Apache Data Binding mechanism.
  • Debug SOAP messages with the Axis2 SOAP Monitor.

Class Outline

  1. Intro to Axis2 and Web Services
    • What is a Web Service?
    • XML Based Web Service Technologies
    • Why Web Services?
    • Web Service Standards
    • Java Web Services
    • Apache Axis2
    • Axis2 Features
    • Axis2 Architecture and Processing Model
  2. Simple Web Services
    • Deploy the Service
    • Run the Client
    • SOAP Overview
    • The SOAP Document
    • WSDL Overview
    • WSDL Content
    • Abstract WSDL Elements
    • Concrete WSDL Elements
    • SOAP Monitor
  3. Axis2 Clients
    • Databinding in Axis2
    • ADB Databinding
    • Clients
    • Steps to Create a Client
    • Obtain the WSDL File
    • The wsdl2java Tools
    • Wsdl2java Options
    • Generated Code
    • Client Code Overview
    • Import the Generated Classes
    • Instantiate the Stub
    • Set the Request Parameters
    • Call the Service Method and Get the Results
    • Compile and Run the Client Code
  4. Axis2 Services
    • Creating Server Code
    • Steps to Create a POJO Service
    • Building a POJO
    • The Server Descriptor
    • The service Element
    • MEPs and Message Receivers
    • More services.xml Configurations
    • AAR Files
    • Generating WSDL from Java Code
    • Steps to Create a WSDL Based Service
    • Generate Server Artifacts from WSDL
    • Steps to Edit the Skeleton
    • Import the Generated Classes
    • Get the Parameters
    • Write the Business Code
    • Instantiate a Response
    • Build and Deploy