Currently a service can be built and implemented as : Web service REST Component

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2 Currently a service can be built and implemented as : Web service REST Component

3 Service-orientation is a design paradigm intended for the creation of solution logic units that are individually shaped so that they can be collectively and repeatedly utilized in support of the realization of the specific strategic goals and benefits associated with SOA and serviceoriented Computing.

4 To realize the strategic benefits of service-oriented computing requires that each piece of solution logic be designed consistently and in a manner that fully supports the expected target environment. This is the Role of Service-Orientation. It is the fundamental method by which serviceoriented solutions are created.

5 There are eight distinct design principles that are part of the service-orientation design paradigm Service Loose Coupling Service Abstraction Standardized Service Contract Service Reusability Service Autonomy Service Composability Service Statelessness Service Discoverability

6 The application of the principles on the right side tend to result in concrete design characteristics being added to a service Whereas the principles on the left side usually act as regulatory influences, ensuring a balanced application of service-orientation as a whole. A solution is considered service-oriented once service orientation has been applied to a meaningful extent.

7 Service-orientation emerged as a design approach in support of achieving the following goals and benefits associated with SOA and service-oriented computing: Increased Intrinsic Interoperability. Increased Federation. Increased Vendor Diversification Options. Increased Business and Technology Domain Alignment. Increased ROI. Increased Organizational Agility. Reduced IT Burden.

8 Having just explained the service-orientation design paradigm and its associated goals, we now need to turn our attention to the physical design of a Service-Oriented Solution or environment. In support of achieving the goals of Service-Orientation, there are four base characteristics we look to establish in any form of SOA: Business-Driven Vendor-Neutral Enterprise-Centric Composition-Centric These characteristics help distinguish SOA from other architectural models and also define the fundamental requirements a technology architecture must fulfill to be fully supportive of service-orientation

9 The intentional design of technology architecture is very important to service-oriented computing. It is essential to establishing an environment within which services can be repeatedly recomposed to maximize business requirements fulfillment. As evidenced by the range of architectural design patterns, the strategic benefit to customizing the scope, context, and boundary of an architecture is significant.

10 To better understand the basic mechanics of SOA, we now need to study the common types of technology architectures that exist : Service Architecture The architecture of a single service. Service Inventory Architecture The architecture that supports a collection of related services that are independently standardized and governed. Service Composition Architecture The architecture of a set of services assembled into a service composition. Service-Oriented Enterprise Architecture The architecture of the enterprise itself, to whatever extent it is service-oriented.

11 Service Servi ce Servi ce Servi ce Servi ce Service Inventory Serv ice Ser vic e Ser vic e Service Composition Service-Oriented Enterprise

12 Services are delivered into a service inventory from which service compositions are drawn. These basic elements establish the fundamental service-orientation dynamic but also represent the three common SOA types that can reside within a service-oriented enterprise (bottom).

13 SOA goals (Slide-8) represent the desired end-result of applying the method of service-orientation. Increased Federation Increased Vendor Diversity Options Increased Intrinsic Interoperability Increased Business and Technology Alignment Increased ROI Increased Organizational Agility Reduced IT Burden The common strategic goals and benefits of service-oriented computing are realized through the application of service-orientation. This, in turn, impacts the demands and requirements placed upon the four types of service-oriented technology architectures. Note : The three goals on the right represent the ultimate target benefits achieved when attaining the four goals on the left

14 Following are the SOA Design Patterns 1. Foundational Inventory Patterns 2. Logical Inventory Layer Patterns 3. Inventory Centralization Patterns 4. Inventory Implementation Patterns 5. Inventory Governance Patterns 6. Foundational Service Patterns 7. Service Implementation Patterns 8. Service Security Patterns 9. Service Contract Design Patterns

15 Following are the SOA Design Patterns 10. Legacy Encapsulation Patterns 11. Service Governance Patterns 12. Capability Composition Patterns 13. Service Messaging Patterns 14. Composition Implementation Patterns 15. Service Interaction Security Patterns 16. Transformation Patterns 17. Common Compound Design Patterns 18. MISC Patterns