Introduction To SOA Aditya Thatte BE Computer Science email : aditya.thatte8@gmail.com

Aditya Thatte

BE Computer Science

email : aditya.thatte8@gmail.com

Evolution in Technology

Persistent Problems Complexity at Middle Tier Less use of power of internet System Services were bottleneck Ever changing business Cost of updating and upgrading

Complexity at Middle Tier

Less use of power of internet

System Services were bottleneck

Ever changing business

Cost of updating and upgrading

Birth of Distributed Computing

IT Challenges Scalability Flexibility Time to Market Ever changing business environment Integrating and monitoring apps Widespread interdependencies Business driven by IT Cut throat business , aggressive competitors

Scalability

Flexibility

Time to Market

Ever changing business environment

Integrating and monitoring apps

Widespread interdependencies

Business driven by IT

Cut throat business , aggressive competitors

Service Oriented Architecture Based on SOC paradigm Fundamental entity “Service” Services as loosely coupled components Black boxing modules Reorganisation , integration of applications Runtime reusability of key services Business supported by technology

Based on SOC paradigm

Fundamental entity “Service”

Services as loosely coupled components

Black boxing modules

Reorganisation , integration of applications

Runtime reusability of key services

Business supported by technology

Concept of Service Self describing Platform agnostic Logical / business function Allow quick , cheap computation of distributed applications Available on internet/ B2B links Enables cross platform/enterprise integration

Self describing

Platform agnostic

Logical / business function

Allow quick , cheap computation of distributed applications

Available on internet/ B2B links

Enables cross platform/enterprise integration

Key aspects of a Service Precise ( in terms of functionality) Specific ( stick to standards WSDL,COM etc) Reliable Platform agnostic Loosely coupled Location transparency Reusable

Precise ( in terms of functionality)

Specific ( stick to standards WSDL,COM etc)

Reliable

Platform agnostic

Loosely coupled

Location transparency

Reusable

Sample SOA

Components Order entry – Client / end user Application server – processes request Business process – Business rules of enterprise Workflow – human intervention Customer Service database – Oracle Order management database – Seibel Adapters – Middleware Shipping service – 3 rd party service

Order entry – Client / end user

Application server – processes request

Business process – Business rules of enterprise

Workflow – human intervention

Customer Service database – Oracle

Order management database – Seibel

Adapters – Middleware

Shipping service – 3 rd party service

Explanation of figure Databases – disparate sources Workflow – human service Business process module – aligns business rules Shipping module – used as 3 rd party service Adapters – middleware technology Clients – millions of users over internet All of the above are seamlessly integrated into a Service Oriented Architecture ( SOA)

Databases – disparate sources

Workflow – human service

Business process module – aligns business rules

Shipping module – used as 3 rd party service

Adapters – middleware technology

Clients – millions of users over internet

All of the above are seamlessly integrated into a Service Oriented Architecture ( SOA)

Goals of SOA Enable B2B , B2C over different platforms Allow different applications to talk to each other easily Render end to end services to end user/ 3 rd party applications Speed business change Improve “Time to Market” Facilitate seamless Integration of software Align Business process & IT Reusability of components Provide an easier and happier business environment

Enable B2B , B2C over different platforms

Allow different applications to talk to each other easily

Render end to end services to end user/ 3 rd party applications

Speed business change

Improve “Time to Market”

Facilitate seamless Integration of software

Align Business process & IT

Reusability of components

Provide an easier and happier business environment