SOA

1
SOA

• Chapter 1
• Introduction

2
Goals of the Book

• Understand SOA, service-orientation, and Web
  services
• Learn to build SOA with Web services

3
The False SOA

• Service-Orientation is a confusing term
• SOA has represented a baseline distributed
  architecture with no reference to implementation
• For us, this conception is a starting point
• SOA has emerged as an architectural platform
• Introduces new concepts by select technologies

4
The False SOA

• SOA is not simply a technical architecture
  comprised of Web services
• Simply investing in Web services doesnt lead to
  the benefits offered through SOA

5
The Ideal SOA

• Resources are cleanly partitioned and
  consistently represented. Software processes
  more closely model business processes
• Automation and business logic conform to this
  vision
• This model applies equally to a task, a solution,
  an enterprise, a community

6
The Ideal SOA

• SOA is the next phase of business automation
• Mainframe solutions led to Client-server
  solutions
• Client-server solutions led to distributed
  systems based on Web services
• Web services has led to Web-services driven SOA
• All major vendors are supporting SOA

7
The Real SOA

• The false SOA has distorted the vision of the
  ideal SOA
• SOA requires a mind-set change in which business
  logic is viewed from a service-oriented context
• The technical architecture introduces new
  technology and infrastructure requirements

8
The Ideal SOA

• Real SOAs demand that an organization undergo a
  top-down transformation
• Real SOA requires real change, forsight,
  commitment - a cultural change

9
What the Book Covers

• Primitive and contemporary variations of SOA
• Fundamental Web services theory
• Principles of service-orientation
• 10 WS- specifications
• Advanced SOA concepts and design issues

10
What We Will Do

• Perform a service-oriented analysis
• Model service candidates
• Design an SOA
• Design application services for technology
  abstraction
• Design business services for business processes
• Assess SOA support provided by J2EE and .NET
  platforms