What is SOA
SOA is an architecture style, which exposes business or technical functionalities as reusable, compos-able and self describing stateless service over network.
Advantages of SOAThere are only three advantages of SOA:
- Re usability
- Frugality of IT Assets
- Agility
All other advantages can be derived from these three.
Business & Technical Case for SOA
Business
Fast pace business environment
Customers taste change
Merger, acquisition & split
Change in business processes & procedures
Ever changing legal environment
Ever changing IT environment
Never ending race for cost cutting
Technical
Spaghetti of technologies
Independence from Technology and/or Vendor
Shrinks SDLC efforts
Reusable, compos-able services available over network
SOA offer the following advantages over traditional approaches to distributed computing:
Business services across the platforms
Provide location independence
Services need not be at a particular system or particular network
Completely loosely coupled approach
Authentication and authorization support at every level
The search and connectivity to other services is dynamic
Short-term benefits of implementation:
Enhances reliability
Reduces hardware acquisition costs
Leverages existing development skills
Accelerates movement to standards-based server and application consolidation
Provides a data bridge between incompatible technologies
Long-term benefits of implementation:
Provides the ability to build composite applications
Creates a self-healing infrastructure that reduces management costs
Provides truly real-time decision-making applications
Benefits from the perspective of Business Value Ability to more quickly meet customer demands
Lower costs associated with the acquisition and maintenance of technology
Management of business functionality closer to the business units
Leverages existing investments in technology
Reduces reliance on expensive custom development
When to say NO to SOA
Every one is advocating for SOA. But there must be some scenarios when not to use SOA.
In Homogeneous IT environment.
When real time performance is critical.
When Business and IT environment is static.
When tight coupling is advantageous not a disadvantageous.
When huge amount of data transfer is happening.
When data sharing is in batch mode.
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