Contemporary Principles of Service Orientation and Service Layers

1
Contemporary Principles of Service Orientation
and Service Layers

• 605.702 Service Oriented ArchitectureJohns-Hopkin
  s University
• Montgomery County Center, Spring 2009
• Session 5 February 24, 2009
• Instructor T. Pole

2
Session 5 Agenda

• Required Reading for This Week
• Chapter 8 Principles of Service Orientation
• Todays Presentation
• Lecture CH 8
• Review exercises 1 through 3
• Intro to exercise 4
• Building a Service Composition
• White Board Exercise Service Layer Architecture
  of a System Engineering Asset Management (SEAM)

3
CH 8 Principles of Service Orientation (1 of 2)

• 8.1 Service-orientation and the enterprise
• Business oriented services can encapsulate
  business logic as application logic
• 8.2 Anatomy of a service-oriented architecture
• Messages (aka units of communication) pp 286
• Operations grouped in services
• Process instances 8.2.4
• 8.3 Common principles of service orientation
• Listed page 291

4
Ch 8 Principles of Service Oriented Architecture
(2 of 2)

• 8.4 How service-orientation principles
  inter-relate
• The semantic graphs (e.g. figure 8.26) show the
  relationships among these principles
• 8.5 Service-orientation and object-orientation
• Many SOA characteristics reflect those aspecs of
  SOA which are rooted in OOA/OOD
• 8.6 Native Web service support for
  service-orientation principles
• Web services inherently support SOA many
  principles

5
Review Exercise 1

• Building a service consumer
• See lecture 2, February 4, 2009
• Notes
• Send questions to prof_at_hisdomain.net

6
Review Exercise 2

• Building a service consumer
• See lecture 3, February 11, 2009
• delivered February 16
• Notes
• Send questions to prof_at_Hisdomain.net

7
Review Exercise 3

• Building a service consumer
• See lecture 4, February 18, 2009
• Notes
• Because of the damage done to the class web site
  by persons or events unknown this week, we will
  be shutting down write access to the site,
  hopefully temporarily.
• Once we have a more effective backup and security
  policy in place, student write access will be
  reinstated
• You will not be required to publish exercise 3
  to the class web site until student write access
  is restored.

8
Exercise 4 Building a Service Composition

• A Web Service Composition is a set of cooperating
  web services
• The white board exercise in class this evening
  will serve as the basis for exercise 4 which
  will be assigned next week (3/4/09) and be due
  the week we return from spring break (3/25/09)

9
White Board Exercise

• Service Layer Architecture of a System
  Engineering Asset Management (SEAM) System
• SEAM
• A Content Management System for all the Artifacts
  Produced and Related to a System Development
  Effort
• A content management system is a system which
  manages unstructured data, i.e. documents
• Unscripted exercise