In event communication, the event sender class does not know which object or method will receive (handle) the events it raises.
在事件通信中，事件发送方类不知道哪个对象或方法将接收到(处理)它引发的事件。
If you want to count a particular event when you use the profiler, for example, L2 cache misses, you can build a performance session around that event sender.
如果您在使用探查器时要对特定事件进行计数(例如l2缓存未命中数)，则可以围绕该事件发送方生成性能会话。
Once delivered to the end-point manager, the sender can be assured that the message will be delivered or a definite event (time out) will be raised.
一旦传递给了端点管理器，发送方可以确信消息将被传递或是将会引发一个明确的事件(超时)。
This means that you can attach the same Listener instance to multiple widgets where necessary; you can use the sender parameter to determine which of them fired the event.
这意味着可以把同一个Listener实例附加到所需的多个小部件上；可以用sender参数确定是哪个小部件触发了事件。
Under Portlet message event: Add message listener and Add message sender portlet sample
在Portlet消息事件之下的是：Addmessagelistener和 Add messagesender portletsample。
Under Portlet message event: Add message listener and Add message sender portlet sample
在Portlet消息事件之下的是：Addmessagelistener和 Add messagesender portletsample。
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