Question

我对netty有点问题。目前，netty没有处理消息，channelRead（）方法没有被执行，但是logger说netty收到了消息，并且channelReadComplete（）方法也被执行了。

try {
            //logger
            Logger.getRootLogger().debug("initialize channel pipeline.");

            //use gzip compression
            //pipeline.addLast("deflater", ZlibCodecFactory.newZlibEncoder(ZlibWrapper.GZIP));
            //pipeline.addLast("inflater", ZlibCodecFactory.newZlibDecoder(ZlibWrapper.GZIP));

            //log events
            pipeline.addLast("logger", new LoggingHandler(LogLevel.DEBUG));

            //message encoder and decoder
            pipeline.addLast("encoder", new MessageEncoder());
            pipeline.addLast("decoder", new MessageDecoder());

            //create message handler
            final MessageLookupHandler handler = new MessageLookupHandler() {
                @Override
                protected void initActions(Map<Byte, MessageAction> map) {
                    if (map == null) {
                        Logger.getRootLogger().warn("LookUp Table is null.");
                    }

                    try {
                        Logger.getRootLogger().debug("initialize actions.");

                        //login action
                        map.put(LoginAction.MESSAGE_TYPE, new LoginAction(LoginServer.this.userSystem, LoginServer.this.sessionClient));

                        //register action
                        map.put(RegisterAction.MESSAGE_TYPE, new RegisterAction(LoginServer.this.userSystem));

                        //mail activation action
                        map.put(ActivationAction.MESSAGE_TYPE, new ActivationAction(LoginServer.this.userSystem));

                        for (Map.Entry<Byte,MessageAction> entry : map.entrySet()) {
                            Logger.getRootLogger().debug("registered action: " + entry.getKey());
                        }
                    } catch (Exception e) {
                        //because netty doesnt catch exception in constructors, print stacktrace here
                        e.printStackTrace();
                    }
                }

                @Override
                public void exceptionCaught (ChannelHandlerContext ctx, Throwable cause) {
                    //exception handling
                    cause.printStackTrace();
                }
            };

            //add handler
            pipeline.addLast(new ChannelInboundHandlerAdapter() {
                @Override
                public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
                    Logger.getRootLogger().debug("channel read.");
                    super.channelRead(ctx, msg);
                }

                @Override
                public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
                    java.util.logging.Logger.getLogger(MessageLookupHandler.class.getName()).info("channel read complete.");
                    //ctx.flush();
                }
            });

            pipeline.addLast("handler", handler);
        } catch (Exception e) {
            e.printStackTrace();
        }

MessageEncoder，具体：

public class MessageEncoder extends MessageToByteEncoder<Message>
{
    @Override
    protected void encode(ChannelHandlerContext ctx, Message msg, ByteBuf out) throws Exception
    {
        out.writeInt(Message.HEADER_LENGHT + msg.content().readableBytes());
        out.writeByte(msg.getType());
        out.writeByte(msg.getVersion());
        out.writeBytes(msg.content());
    }
}

MessageDecoder：

public class MessageDecoder extends ByteToMessageDecoder
{   
    @Override
    protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception
    {
        if (in.readableBytes() < 4) return;
        in.markReaderIndex();

        int length = in.readInt();
        if (in.readableBytes() < length)
        {
            in.resetReaderIndex();
            return;
        }

        byte type = in.readByte();
        byte version = in.readByte();
        ByteBuf content = in.slice(in.readerIndex(), length - Message.HEADER_LENGHT);
        in.skipBytes(length - Message.HEADER_LENGHT);

        // increment refcount since content is a slice of in and ByteToMessageDecoder will release in
        content.retain();

        Message message = new Message(type, version, content);
        out.add(message);
    }
}

记录器输出：

33808 [nioEventLoopGroup-3-1] DEBUG root  - initialize channel pipeline.
33808 [nioEventLoopGroup-3-1] DEBUG root  - initialize actions.
33808 [nioEventLoopGroup-3-1] DEBUG root  - registered action: 1
33809 [nioEventLoopGroup-3-1] DEBUG root  - registered action: 2
33809 [nioEventLoopGroup-3-1] DEBUG root  - registered action: 3
33810 [nioEventLoopGroup-4-2] DEBUG io.netty.handler.logging.LoggingHandler  - [id: 0x31c22087, /127.0.0.1:53164 => /127.0.0.1:3001] REGISTERED
33810 [nioEventLoopGroup-4-2] DEBUG io.netty.handler.logging.LoggingHandler  - [id: 0x31c22087, /127.0.0.1:53164 => /127.0.0.1:3001] ACTIVE
33883 [nioEventLoopGroup-4-2] DEBUG io.netty.handler.logging.LoggingHandler  - [id: 0x31c22087, /127.0.0.1:53164 => /127.0.0.1:3001] RECEIVED: 200B
         +-------------------------------------------------+
         |  0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f |
+--------+-------------------------------------------------+----------------+
|00000000| 7b 22 62 69 72 74 68 64 61 79 22 3a 7b 22 6d 6f |{"birthday":{"mo|
|00000010| 6e 74 68 22 3a 31 2c 22 79 65 61 72 22 3a 31 39 |nth":1,"year":19|
|00000020| 39 36 2c 22 64 61 79 22 3a 31 7d 2c 22 6d 61 69 |96,"day":1},"mai|
|00000030| 6c 22 3a 22 74 65 73 74 40 70 65 6e 74 61 71 75 |l":"test@*******|
|00000040| 69 6e 2e 63 6f 6d 22 2c 22 70 61 73 73 77 6f 72 |******","passwor|
|00000050| 64 48 61 73 68 22 3a 22 36 65 59 7a 43 58 71 35 |dHash":"********|
|00000060| 7a 72 50 6b 6a 73 50 33 44 75 4b 2b 75 6b 48 51 |****************|
|00000070| 58 56 51 67 37 2b 35 64 71 46 2b 58 32 58 41 46 |****************|
|00000080| 63 6e 57 48 2f 61 4d 2b 39 50 38 6a 49 67 69 50 |****************|
|00000090| 54 48 6e 6f 45 7a 7a 4a 7a 5a 38 31 45 76 54 54 |****************|
|000000a0| 6f 77 50 4c 32 31 76 46 68 55 46 61 41 41 3d 3d |****************|
|000000b0| 22 2c 22 75 73 65 72 6e 61 6d 65 22 3a 22 74 65 |","username":"te|
|000000c0| 73 74 75 73 65 72 22 7d                         |stuser"}        |
+--------+-------------------------------------------------+----------------+
Okt 19, 2015 9:00:35 PM com.pentaquin.core.network.MessageLookupHandler channelReadComplete
INFORMATION: channel read complete.

有没有人有想法？谢谢你的帮助！

Netty 4没有处理消息

0 个答案: