Developing Core JEE Web Services

Course Objectives

Today's development environments are increasingly dominated by sophisticated tooling that makes the initial development of web services less arduous. The production-level implementation, deployment, and maintenance of web services are far more complex and demanding.   Java Web Service Essentials focuses on providing an understanding of the fundamental technologies used in web services. This understanding is critical to being able to diagnose, troubleshoot, tune, and perform other lifecycle activities.   Working in a dynamic, interactive discussion and hands-on programming environment, developers will be able to:

• Understand and apply the basic concepts of SOA to the identification and design of web services
• Understand and intelligently discuss Web Services and the core technologies involved
• Understand and apply the basic concepts of SOA to the identification and design of web services
• Appreciate the concept of layered services including orchestration
• Understand and intelligently discuss Web Services and the core technologies involved
• Design, develop, and deploy real-world JEE Web Services

• Expose existing Java components as XML Web Services
• Write Java components that access remote Web Services hosted by a third party
• Read and understand a WSDL document
• Parse, process, and respond to a SOAP message
• Understand the concepts behind REST and implement a REST-based web service
• Implement handlers to inject cross-cutting solutions for security, logging, auditing, and other needs
• Work with WS-Security to protect content, resources, and other assets

  Students will explore at the current state of the art of Web services, what works and what doesn’t work, and also at newer standards, and how they fit into the Web services picture. Web services are still evolving rapidly, and this course will give you a thorough understanding of the current Web services architecture, and the technologies that support Web services including:

• SOAP – Simple Object Access Protocol - A remote invocation (RPC) and messaging mechanism.WSDL – Web Services Description Language – An XML language that describes the interface and semantics of a Web service.
• REST- Representational State Transfer - A style of implementing web services that is gaining increasing acceptance and use
• WS-I –Web Services Interoperability Profiles
• WS-Security/XWSS – Web Services Security
• JAX-WS 2.0 – Accessing Web services using Java
• JAXB – Used for binding XML to Java, increasing interoperabiltiy between the two

Course Prerequisites

This is an intermediate level training course, designed for experienced Java developers and architects who need to identify, design, and implement web services. We will explore and apply the terminology, the specification, the processes and technologies specific to web services.   Students should have 1-2 years of working knowledge with Servlets and JSPs, and should be familiar with XML, Namespaces, and XML Schema.

Course Agenda

Session: Path to Useful Web Services   Lesson: Services Via the Web

• Architectural Style: Common Framework
• Loose Coupling: Spectrum of Options
• Software Agents: Services
• Interacting: Orchestrated
• SOA Reference Architecture
• Service Layers
• Governance and Compliance 

Lesson: Web Services Overview     

• Web Services Architecturally   
• Spec and Standard Evolution    
• Web Services Interoperability Organization          
• .NET Platform & .NET Web Services
• Java and Web Services

  Lesson: Web Services, Java, and JEE

• XML Signature             
• XML Encryption           
• JAXP, JAXB, and JAX-WS            
• JEE and Web Services
• Web Services Stacks at a Glance              

Lesson: Web Services Quickstart

• “Typical” Web Services Stack
• How Stack is Used on the Service-Side
• How Stack is Used on the Client-Side
• Debugging Web Services

Session: Foundation of Web Services

Lesson: XML, Namespaces, & Schema

• XML Separates Structure, Content and Format
• XML Namespaces
• Namespaces Best Practices
• W3C XML Schemas

Lesson: XML in Java - JAXP and JAXB

• JAXP: Java API for XML Processing
• Security Concerns Relative to Parsing
• JAXB: Binding XML to Java

Session: Binding – SOAP/REST

Lesson: SOAP Overview

• Anatomy of a SOAP Message
• SOAP and HTTP
• SOAP Messaging
• Remote Procedure Calls
• SOAP With Attachments
• The SOAP Envelope
• SOAP Data Model

Lesson: REST Overview

• REpresentational State Transfer
• REST Characteristics
• REST Elements
• REST Architectural Principles
• REST and HTTP
• REST/HTTP: Representation-Oriented
• REST Design Principles

Session: Description and Discovery

Lesson: WSDL Overview   

• Describing Web Services
• WSDL in Practice
• WSDL/SOAP Namespaces
• WSDL Anatomy

Lesson: Discovery

• Issues With Broadly Scoped Discovery
• UDDI Registries
• Tools That Support Discovery

Session: Web Services in Java – JAX-WS

Lesson: JAX-WS Overview

• JAX-WS Architecture
• JAX-WS Features
• Web Service Annotations
• JAX-WS Programming Model
• JAX-WS Handlers

Lesson: Working with JAX-WS         

• JAX-WS Development Process
• Bottom-up Building of a Web Service
• Top-Down Building of a Web Service
• Types of JAX-WS Clients

Lesson: Handlers

• JAX-WS and Handlers
• Handler Life Cycle
• Configuring Handlers
• Understanding SAAJ
• Connections 

Lesson: Working With Attachments              

• SOAP With Attachments
• Sending Binary Data
• Optimized Serialization
• WS-I Attachment Profile
• swaRef
• Enabling MTOM in JAX-WS
• Attached and In-line
• JAX-WS and swaRef

Course Materials

Our robust course materials include much more than a simple slideshow presentation handout.  Student materials include a comprehensive hard-copy course manual, complete with detailed course notes, code samples, diagrams and current reference materials, all directly related to the course at hand, indexed for ease of use. Step-by-step lab instructions, software tutorials and project descriptions are clearly illustrated and commented for maximum learning.