The Research On P2P-Based Web Service Discovery

Web services will provide the packaged applications as a single entity and publish to the network to other procedures for the use of the capabilities. So enterprises and individuals quickly and cheaply can publish their digital assets to network users. Web services are very broad market prospects. With the rapid development of web applications and the rapid growth of web services' number, web service discovery is one of the burning questions in the area of web service research .It is the important component of web service system.Web service discovery is one of the burning questions in the area of web service research.It is the important component of web service system. However, the present main-steam web service discovery method is based on the service matchmaking within the UDDI framework, the UDDI register center can only offer the keyword-based inquiry, and cannot achieve the semantic matchmaking based on service function, a low rate of inquiry precision is resulted in. Furthermore, the presented UDDI register model is a centralized architecture, when the number of register services explodes, it will cause such problems as bottlenecks, single points of failure, and low inquiry efficiency, then the efficiency of web service discovery will be greatly affected.In order to achieve the classification of web services register nodes and exact location of query request, TPROC (two pass routing on chord ),a new lookup algorithm is constructed by combining the lookup protocols of One-hop with Chord and taking into account the ability differences of nodes in the network systems. The interval query locating and message broadcasting algorithms are designed, a web service discovery method based on ontology clustering in TPROC networks is presented. One of its features is classifying service registry nodes according to service ontology on outer ring of TPROC networks. So that specific areas of Web services request can be processed in small service registry nodes. Other feature is that the Acting node can quickly transmitte query request to the appropriate type of service Registry node by using full TPROC networks in the search and the dynamic positioning system. By doing these, the network overload can be alleviated and the efficiency can be improved. The experimental results show that the proposed approach can be applied to the case for larger number of service registry nodes and its maintain good performance can be maintained with increase of the size of the P2P network.