我正在阅读 Netty 4.0.10.Final 的源代码。在 AbstractChannel.AbstractUnsafe 类中
private void invokeLater(Runnable task) {
// This method is used by outbound operation implementations to trigger an inbound event later.
// They do not trigger an inbound event immediately because an outbound operation might have been
// triggered by another inbound event handler method. If fired immediately, the call stack
// will look like this for example:
//
// handlerA.inboundBufferUpdated() - (1) an inbound handler method closes a connection.
// -> handlerA.ctx.close()
// -> channel.unsafe.close()
// -> handlerA.channelInactive() - (2) another inbound handler method called while in (1) yet
//
// which means the execution of two inbound handler methods of the same handler overlap undesirably.
eventLoop().execute(task);
}
有评论让我很困惑。为什么出站事件会立即触发入站事件。有人可以为我解释细节吗？谢谢！