无状态会话 bean 中的实例变量

发布于 2024-12-15 04:31:55 字数 413 浏览 4 评论 0原文

我有一个无状态会话 bean，它有一个实例变量和两个公共方法。下面是它的伪代码。

private int instanceVar;

public void methodA(int x) {
    instanceVar = x;
}

public void methodB() {
    print instanceVar;
}

这两种方法都是从客户端依次调用的。客户端代码和无状态会话bean 部署在Websphere 上。据观察，当应用程序服务器的单个实例或具有 2 个应用程序服务器的集群时，从方法 B 打印的 instanceVar 值与方法 A 中的相同。但在具有 3 个应用程序服务器的环境中，打印的 instanceVar 值包含较旧的值。谁能为我解释这种行为？

提前致谢！

问候，苏杜

原文

I have a stateless session bean which has an instance variable and two public methods.Below is pseudo code of it.

private int instanceVar;

public void methodA(int x) {
    instanceVar = x;
}

public void methodB() {
    print instanceVar;
}

Both the methods are called one after another from the client. The client code and stateless session bean are deployed on Websphere. Its observed that the value of instanceVar printed from methodB is same as in methodA when its a single instance of Application Server or a cluster having 2 Application servers. But in an environment having 3 Application servers, the value of instanceVar printed contains an older value.
Can anyone explain this behavior for me?

Thanks in Advance!

Regards,
Sudhu

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