Lecture 6: Service Oriented Architecture

7/18/2011

Lecture 6: Service Oriented Architecture

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Administrivia

Quizzes Grades on Web site AnimalLingo

– If you were gone, make up lab (10% of grade)

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Learning Objectives

List one or two current events in technology news Define the Long Tail. List the three rules of the Long tail. Define Service Oriented Architecture (SOA) Define a service List 4 benefits of SOA List 3 types of services in information systems Indentify a few considerations of Web services Implement basic Web services in a Web site

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The Long Tail

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“The Long Tail”

What does it mean that we have a “market of hits?” (anyone listen to the Top 40 station?)

Why aren’t obscure products in the market? What is the 20/80 principle and why doesn’t it

apply to the market for music and videos?

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The Long Tail: Power Law Distribution

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The Rules of The Long Tail

Rule 1: Make Everything Available– Why can sellers sell everything online?

Rule 2: Cut the Price in Half; Now Lower it.– Is any price too low?

Rule 3: Help Me Find it.– How do recommendations work?

Service Oriented Architecture (SOA)

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Why are we discussing SOA?

SOA is often passed over in MIS 111 HUGE Buzz Word Not only influences the Internet, and system

design, but does and will continue to mold business, operations, and enterprises in general.

Although we’ll do a little bit of SOA relevant stuff in our little Web site, IT IS MUCH MUCH MUCH BIGGER!10

Service Oriented Architecture (SOA)

Deployment of loosely coupled services to complete a business process, independent from the specific technologies or platforms used

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What is a Service

Service individual units of logic that exists autonomously yet not isolated from other individual units of logic.

Units of logic are still required to conform to a �set of principles that allow them to evolve independently, while still maintaining a sufficient

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Supply Chain

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Business also work like this:

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Benefits

Improved integration and interoperability� Inherent reuse Inherent reuse� � Streamlined architectures, standards, and �

solutions Leverage existing legacy code� Establishing standardized XML data �

representation “Best of the breed”� Agility�16

Benefits

Business Intelligence -> Collaborative Intelligence

Integration Internal cloud -> external Make to order vs. make to stock Micro-business and micro-outsourcing Co-creation Customer-driven innovations and delivery

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Benefits

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SOA – Information Technology

Infrastructure-as-a-service (IAAS) Platform-as-a-service (PaaS) Software-as-a-service (SaaS) Value-add-services

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Infrastructure-as-a-service (IAAS)

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Platform as a Service

– Amazon Web service, Google apps, oracle cloud, MSFT azure cloud

– http://www.microsoft.com/windowsazure/

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Software as a Service (SaaS)

https://skydrive.live.com/ Google sites http://www.google.com/webelements/#!/custom-s

earch

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SaaS: Web Services

A Web service is a method of communication between two electronic devices over a network.

Orchestration: arranging and coordinating Web services

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SaaS: Web Services

http://code.google.com/apis/ajax/playground/ http://splice.cmi.arizona.edu/ http://aws.amazon.com/fws/ http://govollow.appspot.com/# http://www.votesmart.org/services_api.php

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How do service

Encapsulate logic� Relate to each other �

(description/discovery/composition) Communicate� Security� Find Web services�

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Example Protocols

Format data: XML, JSON Define the communication: WSDL

– What functions you can call– What the XML should look like XSD

Encapsulate data: SOAP– Security– Transpiration

Find Web services: UDDI

Tomorrows Class: Reading

http://uxdesign.smashingmagazine.com/2008/01/31/10-principles-of-effective-web-design/

http://www.google.com/support/webmasters/bin/answer.py?answer=35291

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