是否有一个职能,每当一个EJB被调查时就被称作是? 在采用任何方法之前,我需要更新一些数据。
我不敢确切了解你的含义。 首先,你可能需要区分无国籍状态和国有的外籍家庭佣工。
Un Stateless EJB are well, stateless,不应包含数据。 服务器可以决定在任何时候销毁或重建该服务器。 你实际上没有提及它所研究的某一具体事例。 服务器有一批EJBs,其中一台是用的。
国有企业可以包含数据。 你提到了一个具体的例子,这个案例是当拜爱者时创立的。 反馈方法见@PostConstruct或@Prestroy。 (这些呼吁还针对无国籍的外籍家庭佣工,但效果不大)。
尽管如此,如果你需要在使用某种方法之前做一些事情,我建议你使用interceptor(使用@Interceptor,为无国籍人和国有企业工作)。 就像阿片组织一样,你有机会在美制方法实际执行之前和之后做一些事情,例如恢复海滩。
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