Question

在该书中,。 1. 企业 Java Beans 3.1 他们谈到EJB目标和执行目标。我指的是我所读的关于无国籍人士的会议:

Once an instance is in the Method-Ready Pool, it is ready to service client requests. When a client invokes a business method on an EJB object, the method calll is delegated to any available instance in the Method-Ready Pool. While the instance is executing the request, is is unavailable for use by other EJB objects. Once the instance has finished, it is immediately available to any EJB object that needs it. Stateless session instances are dedicated to an EJB object only for the duration of a single method call.

我理解,无国籍人士会如何工作,但我没有看到欧洲犹太人大会的反对和无国籍事件之间的区别?

我认为,当我以“无国家”为名指出那类人时,我就把这类人称为EJB?

Answer 1

I think it refers the EJB object as i.e. a field in your class which references to the EJB.
It s not an EJB instance - it s a proxy which gives you access to the EJB instance.

因此:

public class YourClass {

    @EJB
    private MyEJB myEjb;  // This is a proxy - not a concrete EJB instance
}

在出入通道期间,即myEjb.doSomething(),该集装箱检查将执行该电话的免费EJB。另一时间,您援引myEjb.doSomething(>,该集装箱可再为EJB。

两次,你都使用相同的<密码>myEjbobject,同时在(可能)不同的例上使用了一种方法。

这是我如何理解这一段。

Answer 2

The EJB framework provides services like transactionality for your implmenetation classes and this is done by inversion of control.
When you write a session bean, you write only the business logic of the application and the EJB contatiner handles client calls and all middleware stuff. To do so it generates EJB objects augmented with the extra functionality and also containing your business logic. When you annotate your class, you tell the EJB container to treat it as a basis for EJB objects.
What the excerpt wishes to clarify that stateless session beans do not preserve their state longer than one client request. (Not as stateful beans)

Answer 3

我理解,无国籍人士会如何工作,但我没有看到欧洲犹太人大会的反对和无国籍事件之间的区别?

我认为你混淆不清的是使用EJB Objects这一术语。

我不认为有任何特殊术语。或许可以读

虽然案件正在执行,但其他EJB物体无法使用。

页: 1

虽然案件正在执行,但其他客户无法使用。

页: 1

无国籍会议只用一种单一方法进行。

页: 1

只有在采用单一方法电话的情况下,才对客户进行无国家开庭。客户的第二次电话使用自由集合中的一例。

(“客户”——可以是电灯、 session子、 m子或由土发委会管理的灯塔,也可以是日本宇宙开发公司为获得电子jb参考资料而做调查的。)

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