基于EJB分布式应用的动态配置

Dynamic Configuration of EJB-Based Distributed Applications

分布式应用程序在配置时需要引入传输和同步到应用程序代码的高级特性,EJB与CCM组件模型允许程序员声明其服务必须添加到组件的配置描述。然而,这种方法不允许将新服务动态地添加到整体组件。文中提出一种方法允许应用程序在运行时将新服务添加到整体组件。当一个新服务添加到一个组件时,已经运行并存在的服务组件通过平台进行动态地管理。

Configuring distributed applications at deployment time requires the introduction of high-level features such as transaction and synchronization into application＇ s code. Component models like Enterprise Java Beans （EJB） or CORBA Component Model （CCM） allow programmers to declare in deployment descriptors which services have to be plugged into components. However, these approaches do not allow a dynamic integration of new services. The paper proposes a reflexive approach allowing service integration into component at runtime. When a new service is added to a component, the combination with existing services is managed dynamically by the platform.