问题描述
以下是实施步骤和问题：
Here is the step of implementation and questions:
-
Netty服务器处理程序从客户端接收消息
Netty server handler receives message from client
因为还有其他正在运行的线程来处理用户数据，我们需要将此请求放入队列并让工作进程处理
Because there are other running threads to process the user data, we need to put this request to a queue and let the worker process
在工作者处理数据之后，我们可以在工作线程中回复客户端吗？即使用HashMap缓存ChannelHandlerContext并稍后从工作线程获取响应？
After the worker process the data, can we response back to client in the worker thread? i.e. either using a HashMap to cache the ChannelHandlerContext and get it later from worker thread to response?
谢谢大家
推荐答案
是的，你可以。 ChannelHandlerContext 提供的操作都是线程安全的，因此您可以保留上下文实例供以后使用，并从其他线程使用它。
Yes, you can. The operations provided by ChannelHandlerContext are all thread-safe, and thus you can keep the context instance for later use and use it from other thread.
A ChannelHandlerContext 与它所属的频道具有相同的生命周期。当频道关闭时， ChannelHandlerContext 也会从管道中解除引用。如果你保留对 ChannelHandlerContext 的引用，你应该取消引用它或确保垃圾回收器可以回收它。
A ChannelHandlerContext has the same life cycle with the Channel it belongs to. When the Channel is closed, ChannelHandlerContext is also dereferenced from the pipeline. If you keep the reference to a ChannelHandlerContext, you should dereference it or make sure the garbage collector can reclaim it.
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