This document discusses SOA governance, drivers for SOA implementation, strategic architecture, development of services, technologies for SOA governance, SOA security, SOA implementation strategy and development, trends in SOA adoption, technologies, advances, software as a service, an SOA technologies proof of concept, SOA best practices, and establishes that SOA governance is important for establishing policies, controls, and enforcement for SOA implementation.

1. UNIT-IV
SOA-Governance
By
Dr.E.M.Roopa Devi

2. SOA Governance
SOA Governance is a model of establishing policies,
controls and enforcement mechanism within the
contest of the activities and constructs associated with
SOA implementation

3. Drivers for SOA
Implementation of best practices
Business and IT alignment
Real-time service visibility
Reduce risk
Measurable ROI
Realize service reuse
Track and communicate progress of SOA
implementation

4. Strategic Architecture
●Process
Definition of processes that lead to the formulation of
business,application,information and infrastructure
architecture
●Technologies
Establishment of standards for technologies used for
development and depolyment
●People
Governance team with architects and key stakeholders
from across the enterprise with representation from
senior management

5. Development of Services
●Governance of service Design
●Governance of service Execution
●Governance of service Modification

6. Technologies for SOA Governance
The following capablities are needed to implement
design time and run time governance
Registry and repository
Policy definition and enforcement
Service monitoring and management

7. SOA Security
The key capabilities for securing interactions between
service providers and service consumers include
●Authentication
●Authorization
●Audit
●Identity
●Confidentiality and integrity

8. SOA Implementation
SOA implementation involves two categories
• Strategy
• Development

9. Strategy
Strategy for SOA in an enterprise is done in the context
of business and IT of enterprise.Hence all the steps
involved in defining an enterprise wide IT strategy.
It has three steps
Form team for strategy formulation
Due Diligence
 Finalized Approach
 Strawman architecture
 Interview/workshop schedule

10. AS-IS Assessment
Understanding of business processes of the enterprise
Technical details of IT applications and infrastructure
In delivering to the business objectives
To-Be Strategy
To-Be strategic architecture
Roadmap for implementation
Governance model
Business case

11. SOA Development
On receiving the approval from the senior management
of the enterprise, the next category of activities in SOA
implementation are initiated
It has five steps
Transition Planning
 Transition plan
 Technology Decisions
 Architecturally significant scenarios
 Strategy Documents

12. Validation
 PoCs
 Validated
 Decisions
 Revised Transition plan
Business Process Model Creation
• Business Process Model
Service Development
 Activity Services
 Business Process Services
 Client Services

13. Service Deployment and Monitoring
 Orchestrated Business Processes implemented with
services
Trends in SOA may be viewed under 3 categories
 SOA adoption
 Technologies in relation to SOA
 Advances in SOA

14. SOAAdoption
SOA adoption depends on the following critical factors
Business alignment
Organizational change management
Communications
Trust
Architecture
Scale and sustainability
Governance

15. Technologies in Relations To SOA
Business process Development(BPM) is discipline that
automate and optimize business processes and their
performance in an enterprise.
BPM products are of two types
 Human –centric suites that evolved from imaging
technology
 Integration-centric suites that grew out of enterprise
application integration tools

16. SOA and Web2.0
It represents a range of technologies that include
Asynchronous javascript and XML(AJAX)
Representational state Transfer(REST)
JavaScript Object Notation(JSON)
Really Simple syndication(RSS)
Mashup
Weblog
Wikis

17. SOA and Open Source
Cost and simplicity therefore have been the main
reason for a variety of open source products being
available for implementation
SOAAppliances
SOAApplicances are XML devices that handles
specific tasks related to messaging layer efficiently
SOAApplicances provide an option to parse SOAP and
XML at message level in hardware

18. Advances in SOA
Event Driven Architecture
EDA in conjuction with SOA may be used for
Asynchronous communication between services
Communication between workflow in business
processes
Processes where req/res based communication may not
be suitable
Complex Event Processing

19. Complex Event Processing
Invoking components in an asynchronous manner to
events produced in EDA is to detect patterns in the
events generated to bring intelligence to business
applications in real-time.
In order to be able to detect patterns in the events
generated, CEP applications use rule engines to filter
and aggregate events.

20. Software as a service(Saas)
Service consumer only pays for the services consumed.
“pay-as-you-go” model is attractive for small and medium business
General requirements of a platform to support Saas are as follows
Hosted platform
Multi-tenant
Subscription –based business model
Secure and performing
Services-based integration model
Parameterized
Multiple delivery channels
SLA based service

21. SOA Technologies-PoC
The PoC implements the following functionality of a
Loan Management System
Three types of actors interact with LMS
Customer
Loan Officer
Loan Manager
Use cases of LMS
Request Loan, Approve Loan, Confirm Loan

22. Architecture of LMS
Presentation layer-mode-view-controller components
Business layer-business delegate components and
façade components
Service layer-service proxy for loan service
Integration layer-ESB and process orchestration engine

23. Process Orchestration
Process orchestration engine usually provide visual
tools to specify orchestration
Create a new project in ActiveBPEL
Import required WSDL files into the project
Create a new BPEL process
Drag and drop operations from web references
Create assign tasks wherever there is need for
assigning data
Link these activities in BPEL editor

24. Create correlation set and assign it to receive activities
Create a deployment descriptor using the wizard
available in the IDE and deploy onto the server using
Export Wizard.

25. SOA-Best Practices
The best practices are classified under three categories
SOA Strategy
SOA Development
SOA Governance

26. SOA Strategy
Establish a business case
Adopt an enterprise wide view
Start small grow big
Senior management commitment
Establish SOA guidelines
Educate key stakeholders on paradigm shift with
services model
Ensure cloud is part of the architecture vision of
enterprise
Define a roadmap for implementation

27. SOA Development
Externalize business processes
Create a business process model
Develop a PoC to validate technology stack
Leverage open source to keep the cost down
Define a reference model and reference implementation
Architect and develop services that provide and manage master
data
Ensure team members in different roles
Take advantage of services model to parallelize development
Establish mechanism to publish and reuse services
Consider cloud infrastructure to improve scalability of

28. SOA-Governance
Establish a governance team
Identify a champion to lead the governance team
Constitute an architecture group
Ensure that the policies for security and change management
are defined and operationalized
Monitor and measure SOA results against projected benefits
Ensure SOA governance takes into account cloud services
Conduct service delivery benchmarking to understand health of
SOA
Build skills in SOA governance tools and technologies