随笔分类 -  1 J2EE patterns

摘要：Problem You want to provide access to one or more services using XML and web protocols J2EE applications expose coarse-grained business services using Service Facade (360). However, these services might be too fine grained to expose as a web service or may not be designed to be exposed outside... 阅读全文

摘要：Problem You want to invoke services asynchronously.Forces You want to invoke business services, POJOs, or EJB components in an asynchronous manner. You want to integrate publish/subscribe and point to point messaging to enable asynchronous processing services. You want to perform a business task... 阅读全文

摘要：问： 为什么需要模式？答： 每一个模式描述了一个在我们周围不断重复发生的问题，以及该问题的解决方案的核心。 有了模式，你就能一次又一次的使用该解决方案而不必做重复（探索的）劳动。-----------------------------------------------------------------------------------------------------------------J2EE平台是分层系统，我们按职责将J2EE的层次模型化，共分了五个层次： 客户层、表示层、业务层、集成层和资源层。因为客户层和资源层并不是J2EE平台直接关注的问题，所以后面介绍的21个... 阅读全文