Question

我在使用Netty 3.9时遇到了问题，我已经建立了一个客户端，一旦连接到服务器就会发送/执行编码器。但是，它只是连接而不发送编码器。

ClientHandler的

public final class ClientHandler extends IdleStateAwareChannelUpstreamHandler {

    @Override
    public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
        Channel channel = ctx.getChannel();
        logger.info("Channel connected: " + channel);
    }
}

ClientPipelineFactory

private final ClientHandler handler = new ClientHandler();

@Override
public ChannelPipeline getPipeline() throws Exception {
    ChannelPipeline pipeline = Channels.pipeline();
    pipeline.addLast("handler", handler);
    pipeline.addLast("encoder", new HandshakeEncoder());
    return pipeline;
}

HandshakeEncoder

public final class HandshakeEncoder extends OneToOneEncoder {

    @Override
    protected Object encode(ChannelHandlerContext ctx, Channel channel, Object msg) throws Exception {
        ChannelBuffer buffer = ChannelBuffers.buffer(1);

        buffer.writeByte(49);
        return buffer;
    }
}

Answer 1

只有在向Channel写入内容时才会调用编码器。我想你想要的是扩展SimpleChannelUpstreamHandler并使用类似的东西：

public final class HandshakeHandler extends SimpleChannelUpstreamHandler {

    @Override
    public void channelConnected(ChannelHandlerContext ctx, ChannelStateEvent e) throws Exception {
        Channel channel = ctx.getChannel();
        ChannelBuffer buffer = ChannelBuffers.buffer(1);
        buffer.writeByte(49);
        channel.write(buffer);
    }
}

Netty 3.9客户端不发送编码器

1 个答案: