research-article

Design of a model-generated repository as a service for USDL

Authors:

Keith Duddy,

Michael Henderson,

Alejandro Metke-Jimenez,

Jim SteelAuthors Info & Claims

iiWAS '10: Proceedings of the 12th International Conference on Information Integration and Web-based Applications & Services

Pages 707 - 713

https://doi.org/10.1145/1967486.1967600

Published: 08 November 2010 Publication History

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Abstract

SAP and its research partners have been developing a language for describing details of Services from various viewpoints called the Unified Service Description Language (USDL [12]. At the time of writing, version 3.0 describes technical implementation aspects of services, as well as stakeholders, pricing, lifecycle, and availability. Work is also underway to address other business and legal aspects of services. This language is designed to be used in service portfolio management, with a repository of service descriptions being available to various stakeholders in an organisation to allow for service prioritisation, development, deployment and lifecycle management.

The structure of the USDL metadata is specified using an object-oriented metamodel that conforms to UML, MOF and EMF Ecore. As such it is amenable to code generation for implementations of repositories that store service description instances. Although Web services toolkits can be used to make these programming language objects available as a set of Web services, the practicalities of writing distributed clients against over one hundred class definitions, containing several hundred attributes, will make for very large WSDL interfaces and highly inefficient "chatty" implementations.

This paper gives the high-level design for a completely model-generated repository for any version of USDL (or any other data-only metamodel), which uses the Eclipse Modelling Framework's Java code generation, along with several open source plugins to create a robust, transactional repository running in a Java application with a relational datastore. However, the repository exposes a generated WSDL interface at a coarse granularity, suitable for distributed client code and user-interface creation. It uses heuristics to drive code generation to bridge between the Web service and EMF granularities.

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Cited By

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Duddy KBeazley SKiegeland JSteel JDuddy K(2012)Q: why is a raven like a writing desk?Proceedings of the Modelling of the Physical World Workshop10.1145/2491617.2491621(1-6)Online publication date: 1-Oct-2012
https://dl.acm.org/doi/10.1145/2491617.2491621
Heller MSchmeling BHeinzl SLeidig TDuddy KSandfuchs TKlein AAllgaier M(2012)Enabling USDL by ToolsHandbook of Service Description10.1007/978-1-4614-1864-1_15(385-414)Online publication date: 11-Feb-2012
https://doi.org/10.1007/978-1-4614-1864-1_15

Index Terms

Design of a model-generated repository as a service for USDL
1. Information systems
2. Software and its engineering
  1. Software creation and management
    1. Software development techniques
  2. Software notations and tools
    1. General programming languages
      1. Language types
    2. System description languages
      1. Design languages

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Published In

iiWAS '10: Proceedings of the 12th International Conference on Information Integration and Web-based Applications & Services

November 2010

895 pages

ISBN:9781450304214

DOI:10.1145/1967486

General Chair:
Eric Pardede
La Trobe University, Australia
,
Program Chairs:
David Taniar
Monash University, Australia
,
Eric Pardede
La Trobe University, Australia

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Published: 08 November 2010

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iiWAS '10: 12th International Conference on Information Integration and Web-based Applications & Services

November 8 - 10, 2010

Paris, France

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Duddy KBeazley SKiegeland JSteel JDuddy K(2012)Q: why is a raven like a writing desk?Proceedings of the Modelling of the Physical World Workshop10.1145/2491617.2491621(1-6)Online publication date: 1-Oct-2012
https://dl.acm.org/doi/10.1145/2491617.2491621
Heller MSchmeling BHeinzl SLeidig TDuddy KSandfuchs TKlein AAllgaier M(2012)Enabling USDL by ToolsHandbook of Service Description10.1007/978-1-4614-1864-1_15(385-414)Online publication date: 11-Feb-2012
https://doi.org/10.1007/978-1-4614-1864-1_15

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Recommendations

An Overview of the Unified Service Description Language

Tackling the Challenges of Service Composition in E-Marketplaces

Using temporal policies for managing changing meta-data of Web Services