我对使用netty不太熟悉,对ChannelPipeline的文档有疑问。这是确切的内容:
static final EventExecutorGroup group = new DefaultEventExecutorGroup(16);
...
ChannelPipeline pipeline = ch.pipeline();
pipeline.addLast("decoder", new MyProtocolDecoder());
pipeline.addLast("encoder", new MyProtocolEncoder());
// Tell the pipeline to run MyBusinessLogicHandler's event handler methods
// in a different thread than an I/O thread so that the I/O thread is not blocked by
// a time-consuming task.
// If your business logic is fully asynchronous or finished very quickly, you don't
// need to specify a group.
pipeline.addLast(group, "handler", new MyBusinessLogicHandler());
我不太了解
MyBusinessLogicHandler
类。它应该实现DuplexChannelHandler
还是其他的东西?例如,在我的特殊情况下,我有以下课程:public class Packet{}
我想将某些字节序列解码为
Packet
,提供给MyBusinessLogicHandler
从而生成一些Packet
。然后再次将其编码为字节流,以发送回客户端。我目前这样看:public class MyBusinessLogicHandler extends SimpleChannelInboundHandler<MyModel>{
public void channelRead0(ChannelHandlerContext ctx, Packet msg){
Packet rslt = null;
//Do some complicated business logic
ctx.write(rslt);
}
}
我不确定这是否是在netty中做事的常用方法。你能澄清一下吗?
最佳答案
是的这是实现MyBusinessLogicHandler
的完全正确的方法。您不需要DuplexChannelHandler
,因为您在管道中已经有了MyProtocolEncoder
(我想实现了ChannelOutboundHandler
)。
因此,当您调用ctx.write(rslt)
时,将触发出站处理程序的写事件。DuplexChannelHandler
仅在您要在同一类中实现编码器和解码器的情况下才有用。例如,您可以通过加入MyProtocolEncoder
和MyProtocolDecoder
来实现。