Automatic quality of service (QoS) combination method supporting distributed parallel processing in web service

A technology of service composition and composition method, which is applied in the field of automatic QoS composition of Web services that supports distributed parallel processing, and can solve problems such as limited performance improvement

Active Publication Date: 2012-04-18
ZHEJIANG UNIV
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Problems solved by technology

At present, some scholars have begun to pay attention to this problem and proposed a multi-threaded method to improve the combination efficiency, but it has not broken away from the single-computer computing mo

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  • Automatic quality of service (QoS) combination method supporting distributed parallel processing in web service
  • Automatic quality of service (QoS) combination method supporting distributed parallel processing in web service
  • Automatic quality of service (QoS) combination method supporting distributed parallel processing in web service

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] Service modeling:

[0030] (1) Component service: Component service is the basic unit of service composition, expressed as a triple ,in:

[0031] (a) is the service name;

[0032] (b) Represents the collection of operations provided for the service, an operation can be expressed as a two-tuple , In order to operate the set of semantic concepts corresponding to all input objects, is the set of semantic concepts corresponding to all output objects;

[0033] (c) Set of QoS attributes for the service , Indicates the service's first Item QoS attribute value.

[0034] QoS attributes generally include service response time, throughput, availability, and reliability. In order to simplify the problem, we only consider the response time, denoted as , and all services contain only one operation, so a component servic...

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Abstract

The invention discloses an automatic quality of service (QoS) combination method supporting distributed parallel processing in web service, which comprises the following steps of: constructing and generating a rule base by preprocessing a service library through a main engine; and constructing a tree and a Top-k service chain solution method by adopting a depth-first strategy. Aiming at the problem that Top-k service combination is preferably selected from a large-scale Web service set for the user in the aspect of the expression of QoS, a thought of step-by-step processing is adopted, so that a distributed parallel service automatic combination process is realized. Combination service which meets the demand of a user can be quickly and efficiently provided when dealing with the large-scale service set.

Description

technical field [0001] The invention mainly aims at the problem of fast and efficient automatic combination in a large-scale Web service collection, and proposes a Web service automatic QoS combination method supporting distributed parallel processing. Background technique [0002] In recent years, Web services have been widely used for their good reusability and platform independence. Since automatic service composition can fully reuse existing services, it has the characteristics of instant, fast, and flexible building of distributed and loosely coupled new applications and services, which can meet the diverse, personalized, and changeable needs of users, and can improve the efficiency of existing services. Therefore, service composition technology has become a key technology and research hotspot to realize cloud computing on-demand services, and has attracted much attention as a basic technology for building, promoting and applying "cloud". [0003] At present, automatic...

Claims

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Application Information

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IPC IPC(8): H04L29/06H04L29/08
Inventor 邓水光黄龙涛李莹吴建尹建伟吴朝晖
Owner ZHEJIANG UNIV
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