变量范围如何在 POE 会话中工作? [英] How does variable scoping work in a POE session?

问题描述

谁能解释变量作用域在 POE 会话中是如何工作的?在会话中传递状态而不影响其他会话的正确方法是什么?

Can anyone explain how variable scoping works within a POE session? What is the proper way to pass state within the session, without impacting other sessions?

谢谢乔希

推荐答案

范围不受 POE 影响.

Scoping is unaffected by POE.

您可以使用 POE 的堆(可通过 $_[HEAP] 访问)在各种处理程序之间传递数据.

You can use POE's heap (accessible through $_[HEAP]) to pass data around between your various handlers.

根据文档，默认情况下，会话之间的堆是不同的，但可以覆盖这一点，以便不同的会话共享一个堆.

According to the docs, the heap is distinct between sessions by default, but it is possible to override this so that different sessions share a heap.

sub my_state_handler {
    $_[HEAP]{some_data} = 'foo';
    $_[KERNEL]->yield('another_handler');
}

sub another_handler {
    print $_[HEAP]{some_data}, "\n"; # prints "foo\n"
}

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