A Graph-Based Service Composition Method for Science and Technology Resources

Science and technology resources can be regarded as web services on the Internet, in order to realize the reuse of science and technology resources, the industry provides services for Internet users in multiple web service methods. In order to reuse of the web services, multiple web services need to be combined according to certain rules and business logic to solve the problem of limited functions of a single web service. The web service composition algorithm focuses on finding a service composition scheme with the best service quality. A single service composition scheme cannot cope with the dynamic changes of the network environment in real time, such as service failures. This paper proposes a graph-based service composition method, which uses the service dependency graph to establish the relationship between services, and combines the functional and non-functional attributes of the service. In the service selection stage, a formula for calculating the matching degree between the service and the target parameters is proposed to evaluate the current matching degree between the service and the target parameters, and the service with the best matching degree is selected.