Example usage for io.netty.channel ChannelHandlerContext alloc

Introduction

In this page you can find the example usage for io.netty.channel ChannelHandlerContext alloc.

Prototype

ByteBufAllocator alloc();

Source Link

Document

Return the assigned ByteBufAllocator which will be used to allocate ByteBuf s.

Usage

From source file:com.sample.netty.socket.server.ServerHandlerOutbound.java

@Override
public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) {
    ByteBuf encoded = ctx.alloc().buffer(4);
    encoded.writeBytes(((String) msg).getBytes());
    ctx.writeAndFlush(encoded, promise);
    System.err.println("[SERVER SEND MENSSAGE] " + msg);
}

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From source file:com.sheldon.javaPrj.netty.TimeClientHandler.java

@Override
public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
    buf = ctx.alloc().buffer(4);
}

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From source file:com.sheldon.javaPrj.netty.TimeServerHandler.java

@Override
public void channelActive(final ChannelHandlerContext ctx) throws Exception {
    final ByteBuf time = ctx.alloc().buffer(4);
    time.writeInt((int) (System.currentTimeMillis() / 1000L + 2208988800L));

    final ChannelFuture f = ctx.writeAndFlush(time); // (3)
    f.addListener(new ChannelFutureListener() {
        @Override/*  w  ww. j  a  v  a 2  s  . c  o m*/
        public void operationComplete(ChannelFuture future) {
            assert f == future;
            ctx.close();
        }
    }); // (4)
}

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From source file:com.shelf.messagepack.MessagePackFrameDecoder.java

License:Apache License

protected ByteBuf extractFrame(ChannelHandlerContext ctx, ByteBuf buffer, int index, int length) {
    // make a sliced buffer for reading full contents, then if enough data doesn't reached yet, 
    // ReplayingDecoder will throw an error for replaying decode operation at this line.
    // //  w  w  w  . j  a v  a2  s  .c o  m
    // Don't create a new buffer with ctx.alloc().buffer() before enough data has come. It will not be released (and leaked).
    // If sliced buffer is created successfully, enough data has come.
    ByteBuf slice = buffer.slice(index, length);
    ByteBuf frame = ctx.alloc().buffer(length);
    frame.writeBytes(slice, 0, length);
    return frame;
}

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From source file:com.spotify.folsom.client.MemcacheEncoder.java

License:Apache License

@Override
public void encode(final ChannelHandlerContext ctx, final Request<?> request, final List<Object> out)
        throws Exception {
    workingBuffer.clear();/*from   w ww .j a v  a 2s .c om*/
    final ByteBuf message = request.writeRequest(ctx.alloc(), workingBuffer);
    out.add(message);
}

---

From source file:com.spotify.netty4.handler.codec.zmtp.ZMTPFramingEncoder.java

License:Apache License

@Override
public void flush(final ChannelHandlerContext ctx) throws Exception {
    if (messages == null) {
        return;/*from   w w w  . j a  va2 s.  co m*/
    }
    estimator.reset();
    for (final Object message : messages) {
        encoder.estimate(message, estimator);
    }
    final ByteBuf output = ctx.alloc().buffer(estimator.size());
    writer.reset(output);
    for (final Object message : messages) {
        encoder.encode(message, writer);
        ReferenceCountUtil.release(message);
    }
    final ChannelPromise aggregate = new AggregatePromise(ctx.channel(), promises);
    messages.clear();
    promises.clear();
    ctx.write(output, aggregate);
    ctx.flush();
}

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From source file:com.tcy.app.netty4.Ne4ClientHandler.java

License:Apache License

@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
    this.ctx = ctx;

    // Initialize the message.
    byte[] b = "Unexpected exception from downstream.".getBytes();
    content = ctx.alloc().directBuffer(1).writeBytes(b);

    // Send the initial messages.
    generateTraffic();//  ww w .j a  v  a2 s. co m
}

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From source file:com.tencent.mars.proxy.NetMsgHeaderHandler.java

License:Open Source License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
    try {/*from   ww  w  .  j  a va  2 s .  c  o  m*/
        // decode request
        final NetMsgHeader msgXp = new NetMsgHeader();
        final InputStream socketInput = new ByteBufInputStream((ByteBuf) msg);
        boolean ret = msgXp.decode(socketInput);
        IOUtils.closeQuietly(socketInput);

        if (!ret)
            return;

        linkTimeout.remove(ctx);
        linkTimeout.put(ctx, System.currentTimeMillis());
        logger.info(LogUtils.format("client req, cmdId=%d, seq=%d", msgXp.cmdId, msgXp.seq));

        final ProxySession proxySession = ProxySession.Manager.get(ctx);
        if (proxySession == null) {
        }

        String webCgi = CMD_PATH_MAP.get(msgXp.cmdId);
        switch (msgXp.cmdId) {
        case Main.CmdID.CMD_ID_HELLO_VALUE:
            InputStream requestDataStream = new ByteArrayInputStream(msgXp.body);
            InputStream inputStream = doHttpRequest(webCgi, requestDataStream);
            if (inputStream != null) {
                msgXp.body = IOUtils.toByteArray(inputStream);
                IOUtils.closeQuietly(requestDataStream);
                byte[] respBuf = msgXp.encode();
                logger.info(LogUtils.format("client resp, cmdId=%d, seq=%d, resp.len=%d", msgXp.cmdId,
                        msgXp.seq, msgXp.body == null ? 0 : msgXp.body.length));
                ctx.writeAndFlush(ctx.alloc().buffer().writeBytes(respBuf));
            } else {

            }
            break;
        case Main.CmdID.CMD_ID_SEND_MESSAGE_VALUE:
            requestDataStream = new ByteArrayInputStream(msgXp.body);

            inputStream = doHttpRequest(webCgi, requestDataStream);
            if (inputStream != null) {
                msgXp.body = IOUtils.toByteArray(inputStream);
                Chat.SendMessageResponse response = Chat.SendMessageResponse.parseFrom(msgXp.body);
                if (response != null && response.getErrCode() == Chat.SendMessageResponse.Error.ERR_OK_VALUE) {
                    TopicChats.getInstance().pushMessage(response.getTopic(), response.getText(),
                            response.getFrom(), ctx);
                }
                IOUtils.closeQuietly(requestDataStream);
                byte[] respBuf = msgXp.encode();
                logger.info(LogUtils.format("client resp, cmdId=%d, seq=%d, resp.len=%d", msgXp.cmdId,
                        msgXp.seq, msgXp.body == null ? 0 : msgXp.body.length));
                ctx.writeAndFlush(ctx.alloc().buffer().writeBytes(respBuf));
            } else {

            }
            break;
        case NetMsgHeader.CMDID_NOOPING:
            byte[] respBuf = msgXp.encode();
            logger.info(LogUtils.format("client resp, cmdId=%d, seq=%d, resp.len=%d", msgXp.cmdId, msgXp.seq,
                    msgXp.body == null ? 0 : msgXp.body.length));
            ctx.writeAndFlush(ctx.alloc().buffer().writeBytes(respBuf));
            break;
        default:
            break;
        }
    } catch (Exception e) {
        e.printStackTrace();

    } finally {
        ReferenceCountUtil.release(msg);
    }
}

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From source file:com.tesora.dve.db.mysql.portal.protocol.CachedAppendBuffer.java

License:Open Source License

public void allocateSlabIfNeeded(ChannelHandlerContext ctx) {
    if (cachedSlab != null) //we already have a slab.
        return;/*from  www  . jav  a  2s.  co m*/

    if (PREFER_DIRECT) {
        cachedSlab = ctx.alloc().ioBuffer(SLAB_SIZE);
    } else {
        cachedSlab = ctx.alloc().heapBuffer(SLAB_SIZE);
    }

    cachedSlab = cachedSlab.order(ByteOrder.LITTLE_ENDIAN);
}

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From source file:com.tesora.dve.db.mysql.portal.protocol.MSPProtocolDecoder.java

License:Open Source License

protected void decode(final ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    try {/*from   w w w. j  av  a 2  s .  c o m*/

        if (mspPacket == null) {
            //assumes next full inbound request will have a starting sequence (true except for auth handshake)
            //also assumes we only get one request at a time (synchronous), which is typical of most mysql clients
            int seq = firstPacket ? 1 : 0;
            mspPacket = new Packet(ctx.alloc(), seq, Packet.Modifier.HEAPCOPY_ON_READ, "frontend");
        }

        //deals with the handshake packet
        firstPacket = false;

        if (!mspPacket.decodeMore(in))
            return;

        int sequenceId = mspPacket.getSequenceNumber();
        this.nextSequence = (byte) (0xFF & mspPacket.getNextSequenceNumber()); //save off the sequence for our outbound response.

        ByteBuf payload = mspPacket.unwrapPayload().retain();//retain a separate reference to the payload.
        mspPacket.release();
        mspPacket = null;

        final MyDecoderState state = currentState;
        switch (state) {
        case READ_SERVER_GREETING:
        case READ_CLIENT_AUTH: {
            MSPMessage authMessage;
            if (state == MyDecoderState.READ_CLIENT_AUTH) {
                authMessage = MSPAuthenticateV10MessageMessage.newMessage(payload);
            } else if (state == MyDecoderState.READ_SERVER_GREETING) {
                authMessage = new MSPServerGreetingRequestMessage(payload);
            } else {
                throw new PECodingException("Unexpected state in packet decoding, " + state);
            }
            out.add(authMessage);
            this.currentState = MyDecoderState.READ_PACKET;
            break;
        }
        case READ_PACKET:
            out.add(buildMessage(payload, (byte) sequenceId));
            break;
        }
    } catch (Exception e) {
        LoggerFactory.getLogger(MSPProtocolDecoder.class).warn("problem decoding frame", e);
    } finally {
    }
}

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