Research Of The Service Chain Recommending Method Based On Complex Network

In recent years, with the growing popularity of Web services, Web services are becoming perfect in function and quality. How to associate Web services of different functions according to business process in order to achieve value added of Web services is one of the hot topics. People find that Web services existing on the Internet is not chaotic but a complex network through relations between Web services. Research shows that this network has features of complex network. The features of complex network lay the foundation of service discovery and service combination. How to achieve more functions with Web services by the information of complex network is one of research issues. Web service is closely linked with the quality of service. If we could make a recommendation of Web services in one business process together with QoS, it will bring a great convenience to users.A method of building a complex network based on invoking relationship between Web services is proposed, and then a series of service chains which can achieve certain functions are generated. The method builds relationship between services through matching input and output parameters of services. After a complex network is built, service chains are generated by associate Web services which meet full-matching relationship. Based on the service chain, the paper presents a method of automatic generating composite service flow, the method achieve the control of the service chain process by adding structure node to service chains, which can make the flow be executed by computers. After that, the values of the overall QoS of service chains are calculated according to the structure nodes so as to rank services chains. Many experiments are carried to test the two methods. Meanwhile, the performance of the methods is analyzed.The invoking relationship between services can be used to effectively construct the complex network model. The service chains can achieve value added of Web services and meet the needs of users, it can also stand for some certain business processes. Generating composite service flow on the basis of service chain can control the structure of service chain and make the service chain be executed by computers. The aim of recommending service chains to users can be achieve by calculating the overall QoS values of service chain.