SOA Implementation

SOA Implementation - Requirements

For effective use of SOA, it should meet the following requirements-

1. Interoperability - SOA architecture must enable interoperability amongst different systems and programming languages. It must integrate various applications and different platforms using communication protocol.

2. It must create a federation of resources. It must establish and maintain data flow to data warehouse.

SOA Implementation - Working Principles

The following guiding principles define the ground rules for development, maintenance, and usage of the SOA based architecture -

Compliance with common and industry specific standards
Identification, categorization, provisioning and delivering services. This is followed by continuous monitoring and tracking.
Portability, reusability, granularity, interoperability, modularity, composability, and componentization.

Design /Architectural Principles in SOA Implementation

The following specific architectural principles for design and service definition focus on specific themes that influence the intrinsic behaviour of a system and the style of its design:

Encapsulation – Several web services are wrapped up together in SOA.
Loose coupling – A service has to maintain a relationship of minimum dependency on other services.
Service Contract - Services adhere to a communications agreement, as defined collectively by one or more service description documents
Abstraction – Abstraction describes programming logic used in coding the service.
Reusability - Programming logics in services are split to enable their reuse.
Service Composition – Various services are put together to form composite services.
Autonomy – Services can control the encapsulated logic.
Optimization – High-quality services are preferred over low-quality services.
Discoverability – A services must be designed in a descriptive manner, so that they can be easily found and assessed.
Relevance - Functionality should be presented to extend it is recognized useful by the by the user.

SOA Implementation – Other Considerations

While implementing SOA, the following references must be additionally made -

SOA Reference Architecture - It provides sketch of enterprise-wide SOA implementation, showing component descriptions, architecture diagrams, design patterns, opinions, regulation compliance, standards templates etc.
SOA Life cycle management (SOA Practitioners Guide Part 3: Introduction to Services Lifecycle) – The guide describes services lifecycle. Other contents include comments on key SOA standards, best practices, templates, besides an extensive list of recommended links.
Service Maturity and Performance
Enterprise Application Integration (EAI)
Efficient use of available system resources