sayali ghanekar.ppt
TRANSCRIPT
Vinci: A Service-Oriented Architecture for Rapid Development of Web Applications
Presented by: Sayali [email protected]
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
Vinci - Contents
Basics Goal Architecture Application Development: A Case Study Performance Evaluation Conclusion Research Work References
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
Vinci – Basics [Cont…]
Service Oriented Architecture
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
Vinci – Architecture
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
<QUERYxmls: vinci=“http://vinci.almaden.ibm.com/2000/vinci”><vinci: COMMAND>lookup</><TITLE>Zen and the Art of Motorcycle Maintenance</></>
Vinci – Architecture [cont…]
Old Server Response<RESPONSE><ISBN> 0553277472</></>
Modified Server Response<RESPONSE>
<ISBN> 0553277472</><AUTHOR>Robert M. Pirsig</><PUBLISHER>Bantam Books</></>
Vinci – Architecture [Cont…]
Libraries Classes to retrieve document off the network Convert
Vinci – Architecture [Cont…]
Environment
Find services
Monitoring
Service lifetime management
Scale-up facilities
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
Vinci – Architecture [Cont…]
Remote Services, Proxy, Gateways Proxy
XTalk within the LAN Conversion to SOAP Receive response Reformat to XTalk
Remote Services, Proxy, Gateways Gateway
Exactly opposite
Vinci – Architecture [Cont…]
Vinci – Architecture [Cont…]
Control layer
Quality of Service
Availability
Server Status
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
Vinci – Application Development
Problem StatementYou 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.
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
Vinci – Application Development [Cont…]
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
Vinci – Performance Evaluation [Cont…]
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
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
Vinci – References
Code Name IndigoA 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
Thank You!