Vinci: A ServiceOriented Architecture for Rapid Development of Web Applications

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Vinci A Service-Oriented Architecture for Rapid
Development of Web Applications

• Presented by Sayali Ghanekar
• srgtk4_at_umkc.edu

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Vinci A Service-Oriented Architecture for Rapid
Development of Web Applications

• Research Area Service Oriented Architecture
• Authors Rakesh Agrawal, Roberto J. Bayardo Jr.,
  Daniel Gruhl, Spriros Papadimitriou
• Publisher ACM - Proceedings of the tenth
  International Conference on World Wide Web, Hong
  Kong, Hong Kong, 2001, Pages 355-365

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Vinci - Contents

• Basics
• Goal
• Architecture
• Application Development A Case Study
• Performance Evaluation
• Conclusion
• Research Work
• References

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Vinci Basics

• Web Service
• A Web service is a component that runs on a Web
  server and allows client programs to call its
  methods.
• For example, calling a function adding 2 and 2
• Service Oriented Architecture
• A collection of services
• Communication between services-for example, data
  passing or coordinating activity between two or
  more services

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Vinci Basics Cont

• Service Oriented Architecture

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Vinci Goal

• Provide an architecture to quickly build systems
  which can be scaled effortlessly and easily moved
  from prototype to production.
• Light-weight infrastructure
• Execution speed
• Code base
• Memory footprint
• LAN

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Vinci Architecture
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Vinci Architecture Cont

• Communication Layer
• Components and services communicate by exchanging
  XML documents
• For example, client wishes to get information
  from library server
• XTalk
• Communication between components
• Efficient- speed, size
• ltQUERY
• xmls vincihttp//vinci.almaden.ibm.com/2000/vin
  cigt
• ltvinci COMMANDgtlookuplt/gt
• ltTITLEgtZen and the Art of Motorcycle
  Maintenancelt/gt
• lt/gt

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Vinci Architecture cont

• Old Server Response
• ltRESPONSEgt
• ltISBNgt 0553277472lt/gt
• lt/gt
• Modified Server Response
• ltRESPONSEgt
• ltISBNgt 0553277472lt/gt
• ltAUTHORgtRobert M. Pirsiglt/gt
• ltPUBLISHERgtBantam Bookslt/gt
• lt/gt

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Vinci Architecture Cont

• Libraries
• Classes to retrieve document off the network
• Convert

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Vinci Architecture Cont

• Environment
• Find services
• Monitoring
• Service lifetime management
• Scale-up facilities

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Vinci Architecture Cont

• Environment
• Vinci Name Server (VNS)
• Server Connected on startup
• Port negotiation
• Host-port pairs for client
• Priorities to individual service locations
• Caching
• Store responses
• Cache expiration policy

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Vinci Architecture Cont

• Remote Services, Proxy, Gateways
• Proxy
• XTalk within the LAN
• Conversion to SOAP
• Receive response
• Reformat to XTalk

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Vinci Architecture Cont

• Remote Services, Proxy, Gateways
• Gateway
• Exactly opposite

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Vinci Architecture Cont

• Control layer
• Quality of Service
• Availability
• Server Status

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Vinci Architecture Cont

• Control layer
• Two approaches
• Starter service
• Listens on a fixed port
• Can start other services
• Local agent
• Periodic ping
• Instant Messaging to Service Owner

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Vinci Application Development

• Problem Statement
• You have been given the task of supplying news
  portlets to company portal page. The news comes
  from sources like websites or contracted news
  feeds. These sources have to be normalized and a
  selection criteria has to be provided to select
  the contents for portlets.

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Vinci Application Development Cont

• Content Creation
• Acquire article
• Normalize article
• Configure
• Index keys
• Content Selection and Presentation
• Assemble query document
• Search terms
• Formatting service (HTML)
• Identify relevant articles
• Formatting

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Vinci Application Development Cont

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Vinci Performance Evaluation

• Single Multi-threaded Server
• Load Sharing
• Local Cache (Client side)
• 90 hit ratio
• Remote Cache (Server side)
• Validation
• Interception of service request
• Validation of constraints for all services
• Validation with Cache

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Vinci Performance Evaluation Cont
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Vinci Conclusion

• Vinci supports fast development of efficient,
  scalable and evolvable applications composed of
  loosely coupled services
• Vinci services participate in interactive
  applications in addition to back-end integration
  tasks
• Vinci allows service creation and communication
  by allowing complexity to be layered with minimal
  impact on code base

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Vinci Research Work

• Service Oriented Monitoring registry (SOMR)
• Registry service
• Notification service
• Indigo in upcoming Microsoft Windows
• Service Oriented Architecture and Programming
• Infrastructure unifies wide range of transport
  (TCP, UDP), security mechanisms, topologies and
  assurances for connectivity between many existing
  systems

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Vinci References

• Code Name Indigo
• A Guide to Developing and Running Connected
  Systems with Indigo
• Article Publisher MSDN Magazine, January 2004
• Don Box
• A Service-Oriented Monitoring Registry
• Bahman Kalali, Don Kowan
• ACM Magazine-Proceedings of the 2003 Conference
  of the Center for Advanced Studies Conference on
  Collaborative Research, October 2003, Pages
  107-121

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• Thank You!