Web service composition based on the caching pool

Current web service composition basically proceeds by static composition using pre-defined workflow model. When a user asks for a web service, there is probably not any single web service can satisfy his need. Sometimes, some web services should be composed to fulfill the request. Pure static composition lacks of flexibility. But to compose the web services only when needed will affect the efficiency. To combine the advantage of the two methods, appropriately reduce the the impacts of their defects,a hybrid composition method based on caching pool is proposed which use the caching pool to store composed web services.Using this architecture, system efficiency can be enhanced.