ServiceOriented Architectures SOA

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Service-Oriented Architectures (SOA)

• Kaan Tezgel
• 200571016

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Summary of Content

• Introduction
• Overview of Service Oriented Architecture
• SOA Timeline
• Web Services SOA
• Services (as Web Services)
• Service Descriptions (with WSDL)
• Messaging (with SOAP)
• Creating SOA
• Experiment with Web Services
• Adapt Existing Systems to Use Web Services
• Conclusion

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Introduction

• Cost effective and high performanced
  applications always is a problem.
• SOA is one of the most important arcihecture
  model to achive the the goal.
• SOA is indepentent from implementation
  environment. It uses standart communication
  models.
• .NET or J2EE implementation is supported and
  these invironments can speak to each other.

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Overview of SOA

• IT tried lots of different arhictectures such
  as...
• Object-oriented analysis and design
• Component based design
• Service-oriented design
• SOA Benefits
• Easier to integrate and manage complexity
• Reduce cost and increase reuse
• Be ready for what lies ahead

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Overview of SOA

• How services communicate??
• Independent communcation between services
• Services has service descriptions and messages.

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SOA Timeline

• XML a brief history
• Usage has been started end of 90s.
• XSD XSLT techolongies has been added.
• Web Services a brief history
• WSDL invented in 2001
• SOA a brief history
• WSDL, SOAP, UDDI
• Second-generation Web Services (WS-)

An early model of SOA
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Web Services SOA

• Services (as Web Services)
• Service Provider
• Service Requestor
• Service Models
• Business Service Model
• Utility Service Models

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Web Services SOA

• Service Descriptions (with WSDL)
• Standard service description document

• Messaging (with SOAP)
• Standard messaging protocol between services

WSDL definitions enable loose coupling between
services
Basic structure of a SOAP message
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Creating SOA

• Experiment with web services
• Use an external service for example get
  weather or stock information
• Develop an internal service
• First option? develop an entirely new service
  that uses web services
• Second Option ? develop a service that uses some
  existing system
• Exchange data between existing systems

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Creating SOA

• Adapt existing systems to use web services
• Create a master databaseAlso known as data
  cleansing

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Creating SOA

• Connect components to web services

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Creating SOA

• Routing master database updates

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Creating SOA

• Add additional systems
• Message router options

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Creating SOA

• Database options
• Different database structures can be chosen
• Use replication to avoid machine fails.

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Creating SOA

• Putting options together
• Take advantages of SOA
• Adding high-availability for the customer
  master and message router
• Serve highly available data

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Creating SOA

• Summary of steps in adapting our existing
  application to SOA with web services architecure
• Develop customer master database
• Populate master with clean data
• Connect customer master to web services
• Add message router
• Add adapter for existing system
• Update customer data
• Customer data received
• If data accepted, it is routed from master
• Customer data updated in existing system

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Conclusion

• Connect applications parts with SOA
• XML, communication standard for every device
• Popular solution for IT problems
• E-government...Great example of SOA
• It will be bigger part of ourlife more then
  today

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Thank You...

• Kaan Tezgel