Web service combination method based on searching space reduction

A technology of search space and composition method, applied in the field of web service composition, which can solve problems such as large memory requirements

Inactive Publication Date: 2013-05-15
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: In order to solve the large memory demand in the Web service composition process in the existing method, the present invention proposes a better Web service composition method based on search space reduction that can reduce the memory demand

Method used

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  • Web service combination method based on searching space reduction
  • Web service combination method based on searching space reduction
  • Web service combination method based on searching space reduction

Examples

Experimental program
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Embodiment 1

[0088] The following takes a simple movie on demand service as an example to introduce the whole process. For a user request (R in , R out ), where R in = {director f, year month g, type h}, R out ={duration x, resolution y}. According to the user's request, it can be generated according to step 2 in the Web service composition method figure 2 service dependency graph.

[0089] figure 2 Among them, the rounded rectangles A~K represent Web services, F~K are movie search services, and A~E are some attribute parameters of returned movies. The number behind the rounded rectangle represents the QoS attribute (response time is taken as an example in the figure), and the small circles a~z represent the input and output of the Web service, starring a, movie title b, movie resource c, movie address d, movie rating e , visibility z, for the current web service, the front connection is the input, and the back connection is the output.

[0090] Add a virtual web service according...

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Abstract

The invention discloses a web service combination method based on searching space reduction. The web service combination method based on the searching space reduction comprises steps as below: pretreatment; generating a dependency graph of the web service; adding a virtualized web service; removing the web service which has no contribution for outputting required by a user; building a virtualized tree; traversing the virtualized tree to find a path. The web service combination method based on the searching space reduction is capable of obtaining a good web service combination group in quality of service (QoS) in large-scaled web service combination groups, and has a good usage value in the large-scaled web service combination group problem.

Description

technical field [0001] The invention belongs to the field of Web service composition, and is a Web service composition method based on search space reduction for obtaining better QoS (quality of service) in large-scale Web services. Background technique [0002] Web service composition is about handling the assembly of autonomous service components, so that a new service is derived from the original service component, given the corresponding published service interface. In the current Web service architecture, the interface is described by WSDL (Web Service Description Language) and published through UDDI (Uniform Description, Discovery and Integration). However, supporting composition requires further requirements: (1) composition definitions (2) ensuring that services are composed in such a way that the consistency of both individual services and the entire composite service is guaranteed. There is currently no consistent view on how Web services should be composed. [0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/30H04L29/08
Inventor 杨育彬夏永敏
Owner NANJING UNIV
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