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[Java新手区] Types of EJB’s

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    2015-3-20 14:37
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    发表于 2017-7-20 20:52:45 | 显示全部楼层 |阅读模式
      There should be one question in your head from the previous section, “Surely sharing the same EJB between clients can improve performance, but what If I want to maintain state on my server?”
    The Enterprise JavaBeans specification defines different types of EJB’s that have different characteristics and exhibit different behavior. Two categories of EJB’s have been defined in the specification. Session Beans and Entity Beans, and each of these categories has variations. A hierarchy of the various types of EJB components is shown in the following figure.

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