Application Research On Key Technologies Of Web Service Discovery And Composition

With the extensively application of the Web services, many of the key technical issues such as the publish, discovery and use process of web services are still in the initial research phase which is most desirable to perform depth research and investigation that efficiently content the demanding of the requester for web service.This paper firstly provided the summary on the concept, features of web services, data integration technologies of system structure, the discovery and composition of web services. Secondly, this paper performed the following experiments that are expansion based on the traditional structure of the database, adding attributes description table about quality of service (QoS) and web services composition information table to in the UDDI database; investigation on web services discovery technology based on QoS constraints; quantification technologies of web service's QoS and composition algorithms based on QoS constraints, and implementation of optimal path selection using ant colony algorithm Based on QoS constraints. The experiments show that the algorithm can meet the service requester with the complex service request of QoS constraints, which has lower space complexity superiority than the traditional algorithm, but a trouble is that the algorithm would be present the partial optimal solution in a solution procession, or at a stagnation state, and there is high time complexity of the issues.In the paper, the theoretical research of web services in the application of dynamic e-commerce can be used for reference. Web services technology is still in the development of emerging technologies. Web services architecture will be a very important model in the future applications. But in an open environment, Web services still have many crucial technical problems that must be resolved in discovery and composition of Web Services.