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Service Composition

by Benedikt Liegener last modified Apr 25, 2012 13:45
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Definitions

Term:
Service Composition
Domain: Cross-cutting issues
Engineering and Design
(KM-ED)
Adaptation and Monitoring
(KM-AM)
Quality Definition, Negotiation and Assurance
(KM-QA)
Generic
(domain independent)
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Business Process Management
(KM-BPM)




Service Composition and Coordination
(KM-SC)



Service Composition is a combination of a set of services for achieving a certain purpose.  Different service composition types can be distinguished, in particular: service orchestration, service choreography, service wiring, and service coordination. Often service composition is used as synonym for the more special term service orchestration. [PO-JRA-2.2.1] {SYN: Service Aggregation} {SPC: Service Orchestration, Service Choreography, Service Coordination, Service Wiring}
_ALT_

A service composition is a coordinated aggregate of services. As explained on the Effects of Service-Orientation on the Enterprise page, a composition of services is comparable to a traditional application in that its functional scope is usually associated with the automation of a parent business process.
The consistent application of service-orientation design principles leads to the creation of services with functional contexts that are agnostic to any one business process. These agnostic services are therefore capable of participating in multiple service compositions.
As further discussed at www.soaprinciples.com, the ability for a service to be naturally and repeatedly composable is fundamental to attaining several of the strategic goals of service-oriented computing. Therefore, many of the design characteristics that distinguish a service enable it to effectively participate in service compositions. [WhatIsSOA]
_ALT_

Service Composition involves the development of customized services often by discovering, integrating, and executing existing services.  It's not only about consuming services, however, but also about providing services. This can be done in such a way that already existing services are orchestrated into one or more new services that fit better to your composite application. Additionally this can be done with the help of creating new services based on business logic programmed in Java. SAP's Composite Application Framework enables you to do all these jobs around Service Composition fast, easily, and with high efficiency.  The main development tool is SAP's NetWeaver Developer Studio (SAP NWDS).[SAP]
, Service Infrastructure
(KM-SI)




Generic
(domain independent)




 

Competencies

 

Scenarios

 

References

  • [PO-JRA-2.2.1] "Overview of the State of the Art in Composition and Coordination of Services"
  • [WhatIsSOA] What is SOA? An Introduction to Service-oriented Computing, http://www.whatissoa.com/p12.php (Last accessed on the 25th April 2012).
  • [SAP] A SAP-specific definition of Service Composition, http://scn.sap.com/docs/DOC-23121



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