Research And Design Of EJB Container Framework And Service Extension Mechanism

With the development of middleware,application server is widely used in the distributed platform as an important middleware.the research of application server is paid more attention nowadays,at the same time,containers become the "hot pot" of research as the important part of application server. In this dissertation,the purpose of research is to enhance the extensibility of container.At first, technologies such as EJB,component, middleware .application server are introduced combining with J2EE architecture, Introduction of container is emphasized.Then this dissertation analyse the service-loading mechanism of container combining with the research domain and study actuality at present.According to the the deficiency of service-loading mechanism ,this dissertation provides a framework to extend the container services, by which method invoker is intercepted and injected container services by interception spots, this dissertation introduces the architecture,extension method and dynamic description of extension process of framework detailedly. At last,an instance is introduced to validate the feasibility of extension mechanism using interceptor.Innovations of this paper:1. Design a container framework,which separate component,container,container services effectively.2. Two methods are given to intercept the method invoker. at the same time they are compared.3. Provide a container entrance to intercept the method invoker,and provide a method to improves the efficiency of method invoking by dynamic proxy mechanism.4. Container environment is defined to avoid interference of services set and keep the consistence of service extending.