Eclipse RCP:如何以及何时正确地从EventBroker取消订阅Composite? [英] Eclipse RCP: How and when to correctly unsubscribe a Composite from EventBroker?

问题描述

在自定义组合的构造函数中(继承自SWT Composite )，我将自己注册为Eclipse IEventBroker 的EventHandler.

In the constructor of my custom composite (inherited from SWT Composite), I register myself as an EventHandler to the Eclipse IEventBroker.

要取消订阅，我已经在自己取消订阅的地方覆盖了 dispose 方法.

To unsubscribe upon disposal, I had overridden the dispose method where I unsubscribe myself.

但是我现在注意到取消订阅没有发生，实际上从未调用过 dispose 方法.

But I now noticed that this unsubscription is not happening, indeed the dispose method is never getting called.

退订自己或避免关闭的Composite/ViewPart留下泄漏"事件处理程序的正确方法是什么?

What is the correct way to unsubscribe myself, or to avoid that a closed Composite/ViewPart leaves "leaking" event handlers behind?

我使用Eclipse RCP 3.x(因此没有注释/注入).在E4中，如果我理解正确的话，可以使用自动事件订阅或@Predestroy方法.

I use Eclipse RCP 3.x (so no annotations/injection). In E4 I could use the automatic Event subscription or the @Predestroy method, if I understood it correctly.

推荐答案

使用 Composite 的 addDisposeListener 添加 DisposeListener 并执行取消订阅侦听器.

Use the addDisposeListener of the Composite to add a DisposeListener and do the unsubscribe in the listener.

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