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Crystal-25 April 10-13 2007

Crystal-25 April 10-13 2007. The Rising Power of the Web Browser:. Web Services Based Collaborative Remote Instrument Control and Monitoring. Douglas du Boulay, Clinton Chee, Romain Quilici, Peter Turner, Mathew Wyatt.

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Crystal-25 April 10-13 2007

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  1. Crystal-25 April 10-13 2007 The Rising Power of the Web Browser: Web Services Based Collaborative Remote Instrument Control and Monitoring Douglas du Boulay, Clinton Chee, Romain Quilici, Peter Turner, Mathew Wyatt. Part of a collaboration between Adelaide University, Indiana University, James Cook University, State University of New York (SUNY) at Binghamton, and the University of Sydney.

  2. Crystal-25 April 10-13 2007 • Web services(WS) provide a platform and location independent means of exchanging information between distributed resources. • The specification of a Web service includes the nature of the application interface and the nature of message passed between the applications and resources. • WS typically exchange information or messages with Simple Object Access Protocol (SOAP).A SOAPmessage is an XML eXtensible Markup Language) parcel that typically runs over HTTP (HyperText Transfer Protocol). • The nature of the Web service (resource or application) and its interface is identified in an associated XML based Web Services Definition Language (WSDL: www.w3.org/TR/wsdl) message. • Applications (legacy or otherwise) written in differing programming languages and running across heterogeneous platforms can use Web services to exchange data over the internet

  3. Crystal-25 April 10-13 2007 • Advantages of Web services: • Location, computer platform and computer language independent. Facilitates legacy code re-use. • Integration of the instrument into the Web (and Grid) • Grid friendly (can build a Grid using Web services) • Robust security model (WS-Security supports security tokens and certificates) • Use of HTTP as the underlying Web transport protocol facilitates firewall passage (through port 80) • Supports Service Orientated Architectures (SOAs). Can integrate remote services (standalone client applications, Web applications, command line tools, portal servcies, Grid resources and services) into project/user specific interfaces. • Facilitates the linkage of multiple users and resources for collaborative interactions across the Web.

  4. Crystal-25 April 10-13 2007 • Web services can be used by stand-alone applications and interfaces – e.g. ANSTO’s GUMTree user interface could drive applications using Web services. • Web services are well suited to supporting and enabling Web portal based services, with the user interface then being provided byportlets embedded in a Web browser. • So called Web 2.0technology is enabling the Web as an applications platform, and is changing the original role of the Web browser. For instance; • AJAX(Asynchronous Javascript And XML) introduces a capability for a browser to function in a similar manner to a stand-alone GUI. In particular portlet specific dynamic ‘refresh’ of browser content, • Pushlets allow information/data to be continuously pushed to a browser – in effect over-turning the original browser get ‘paradigm’.

  5. Crystal-25 April 10-13 Together with the use of AJAX, Pushlets and GridSphere portal/portlet software, we’ve been implementing and extending CIMA (Common Instrument Middleware Architecture) as abasis for building Web services driven portal services for remote access.is used to provide the portal-portlets infrastructure. CIMA offers: A general and re-usable Web services framework for instrument access and management. Flexible and extensible with modular use of plug-ins. Abstraction of instrument function. Adaptable to different instrument settings. Standard programmable interface. Publish-subscribe or registration model. Basis for a standardised implementation/deployment system. Grid enablement of instruments made accessible with Web service protocols.

  6. Data Manager SRB Dynamic Content Pushed: Pushlets & AJAX Container A Collaborator Monitor Portlets Container Several simultaneous users. Only one administrator. Data cache Monitor Collaborator Control Web Services Container CIMA Component Operator 1) Requests: XML Parcels SOAP SOAP Pushed Data: XML Parcels 2) Responses: XML Parcels Web Services Container CIMA Component SOAP Pushed Data: XML Parcels Container B Instruments

  7. Dynamic Content Pushed: Pushlets & AJAX Data Manager SRB Collaborator Container A Monitor Portlets Container Several simultaneous users. Only one Administrator Data cache Monitor Collaborator Control Web Services Container CIMA Component Operator 1) Requests: XML Parcels SOAP SOAP Pushed Data: XML Parcels 2) Responses: XML Parcels Web Services Container CIMA Component SOAP Pushed Data: XML Parcels Container B Instruments

  8. Browser Driven Instrument Control

  9. Browser Driven Instrument Simulator

  10. Instrument Monitor

  11. Crystal-25 April 10-13 2007 Acknowledgements: Sydney UniJCUIndiana and SUNY Douglas du BoulayIan M. Atkinson Rick McMullen Clinton CheeTristan King Ken Chiu Richard Leow Nigel G.D. Sim Romain QuiliciMathew Wyatt Australian Research Council:e-Research Seed Funding Programme and the Research Networks Programme (MMSN: Molecular and Materials Structure Network). Department of Education Science and Training:Dataset Acquisition, Accessibility, and Annotation e-Research Technologies (DART) project GrangeNet: The Integration of Scientific Instruments into the Grid

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