Dynamic invocation optimisation and interoperation of services oriented workflow
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Dynamic Invocation, Optimisation and Interoperation of Services-oriented Workflow. Lican Huang, David W. Walker, Omer F. Rana , Yan Huang. School of Computer Science, Cardiff University. 12 May, 2005. CCGrid2005 Wip section. Outline. Introduction Framework of WOSE Prototype of WOSE

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Dynamic Invocation, Optimisation and Interoperation of Services-oriented Workflow

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Dynamic Invocation, Optimisation and Interoperation of Services-orientedWorkflow

Lican Huang, David W. Walker,

Omer F. Rana , Yan Huang

School of Computer Science, Cardiff University

12 May, 2005

CCGrid2005 Wip section


Outline

  • Introduction

  • Framework of WOSE

  • Prototype of WOSE

  • Conclusion

  • Future work

12 May, 2005

CCGrid2005 Wip section


Introduction--background

WOSE Project(Workflow Optimisation Service for e-Science Applications) Funded by the EPSRCCardiff University, Imperial College and Daresbury Laboratory

12 May, 2005

CCGrid2005 Wip section


Introduction--motivation

  • (1) Diversities of Web service composition languages such as PDL, XPDL, BPSS, EDOC, BPML, WSCI, SWFL, and BPEL4WS

  • Diversities of workflow engines, Such as Activebpel, Oracle BPEL

  • Scientific workflow differs from business workflow in many ways.

  • Optimizing workfow by selecting web services and workflow engines among the copies of those at design time and run-time

  • There are some cases that the web services can not decided in design time.

12 May, 2005

CCGrid2005 Wip section


Introduction--Issues to concern

  • mechanisms to discover and invoke Web services dynamically

  • mechanisms to optimize workflow performance by choosing Web services and workflow engines from those available

  • mechanisms to interoperate between workflow languages and engines.

12 May, 2005

CCGrid2005 Wip section


The WOSE Framework

12 May, 2005

CCGrid2005 Wip section


The WOSE Framework--

The WOSE Sequence Diagram

12 May, 2005

CCGrid2005 Wip section


The WOSE Framework--Dynamic selection of Optimal web Services

  • Service Discovery

  • Service Selection

  • Service Dynamic invoking

Another paper submitted to AHM2005

12 May, 2005

CCGrid2005 Wip section


Prototype--XSLT flow chartfrom SCUFL to BPEL4WS

12 May, 2005

CCGrid2005 Wip section


Prototype-- Correspondence between Scufl elements and BPEL4WS

12 May, 2005

CCGrid2005 Wip section


Prototype-- Portion of the XSLT scripts

12 May, 2005

CCGrid2005 Wip section


Prototype—example of scufl to be run in Activebpel

12 May, 2005

CCGrid2005 Wip section


Prototype--Result generated by WOSE for the above example.

12 May, 2005

CCGrid2005 Wip section


Conclusion

  • Present WOSE framework for dynamic invocation, optimization, and interoperation

  • The WOSE framework supports dynamic discovery , dynamic selection and dynamic invoking of web services

  • WOSE framework supports dynamic selection of workflow engines.

  • WOSE framework supports interoperation between different languages and workflow engines.

  • WOSE framework supports dividing large workflow applications into many small blocks and overall optimization

12 May, 2005

CCGrid2005 Wip section


Future work

  • XSLT-converter supports transformation between more languages.

  • Further Implementation of dynamic invoking of arbitrary web services.

  • Further implementation of dynamic discovery and selection of Web services.

12 May, 2005

CCGrid2005 Wip section


  • Thanks

  • Question?

12 May, 2005

CCGrid2005 Wip section


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