无状态EJB中的静态vs实例成员 [英] Static vs Instance members in Stateless EJBs

问题描述

我有一个无状态会话bean，需要访问工厂类。最好在SLSB中将此工厂类声明为静态或实例成员？我正确地说，由于SLSBs被重用，所以每个bean只能创建一个工厂实例（与实例成员选项一起使用），而不是每个请求一个实例？

SLSB的自然方式是使每个实例独立，无静态，不需要实例之间的同步。因此，如果可能，我会有一个SLSB实例的工厂实例。

I have a stateless session bean which needs access to a factory class. Is it best to declare this factory class as a static or instance member in the SLSB? Am I correct in saying that, as SLSBs are reused, only one instance of the factory will be created per bean (when going with the instance member option), as opposed to one instance per request?

解决方案

SLSB instances are pooled, and hence serve potentially many requests over their lifetime, so as you say instance variables are not recreated for each request.

The "natural" way for SLSB is to have each instance independent, no statics, no need for synchronisation between instances. Hence if it's possible I'd have a factory instance per SLSB instance.

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