Example usage for io.netty.buffer ByteBuf isReadable

Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf isReadable.

Prototype

public abstract boolean isReadable();

Source Link

Document

Returns true if and only if (this.writerIndex - this.readerIndex) is greater than 0 .

Usage

From source file:com.ixortalk.nifi.processors.gettcp.TcpClientHandler.java

License:Apache License

/**
 *
 * When data becomes available on the socket, it will trigger the method below.
 * We'll read from the buffer until we find the delimiter.
 * When we find the delimiter, we'll offer it to the queue so that it can be subsequently polled by the processor.
 * The delimiter will not be offered as part of the message (TODO: make this optional)
 *
 * In case we fail to convert a byte from the buffer we log an error, but continue processing.
 *
 * @param channelHandlerContext//from w  w w. j a v  a 2  s.co m
 * @param o
 * @throws Exception
 */
protected void channelRead0(ChannelHandlerContext channelHandlerContext, Object o) throws Exception {
    ByteBuf in = (ByteBuf) o;

    try {
        while (in.isReadable()) {
            byte b = in.readByte();

            if (log.isTraceEnabled()) {
                log.trace("Read byte " + ByteUtils.byteToHex(b));
            }

            if (b == delimiter) {
                if (log.isTraceEnabled()) {
                    log.trace("Found delimiter, offering message : " + message.toString());
                }

                socketMessagesReceived.offer(message.toString());
                message = new StringBuffer();
            } else {
                try {
                    message.append(new String(new byte[] { b }, "UTF-8"));
                } catch (Exception e) {
                    log.error("Error occured while converting byte to string.", e);
                }
            }
        }
    } catch (Exception e) {
        log.error("Error occured while reading channel", e);
    }
}

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From source file:com.kingmed.dp.lisclient.demo.DiscardServerHandler.java

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf in = (ByteBuf) msg;
    try {//from  w  w  w  .  ja va 2 s  .  c o m
        while (in.isReadable()) {
            System.out.println((char) in.readByte());
            System.out.flush();
        }
    } finally {
        ReferenceCountUtil.release(msg);
    }
}

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From source file:com.kradac.karview.netty.EchoServerHandler.java

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
    this.c = ctx.channel();
    ByteBuf buf = (ByteBuf) msg;
    String auxdata = "";
    while (buf.isReadable()) {
        byte aux = buf.readByte();
        char charVal = (char) aux;
        int valEnt = charVal;
        if (valEnt < 10) {
            auxdata += valEnt;/*from w  w w  .  ja v  a  2  s.c  om*/
        } else if (valEnt == 10 || valEnt == 13) {
            auxdata += "@";
        } else {
            auxdata += charVal;
        }
    }
    this.data = auxdata;
    buf.clear();
    System.out.println("Trama que llega: " + this.data);
    if (this.data.indexOf("0@80") == 0) {
        System.out.println("Trama SKP+ +param: [" + auxdata + "]");
        u.sendToFile(3, "skp+", this.data);
        tramaMinuto(this.data.substring(5));
    } else if (this.data.indexOf("0@8000001") == 0) {
        System.out.println("Trama Conexin SKP+: [" + auxdata + "]");
        u.sendToFile(2, "skp+", this.data);
        tramaConecxion(u.clearDataConnection(this.data));
        tipoEquipoGPRS = 1;
    } else if (this.data.indexOf("0@80") == 0) {
        System.out.println("Trama Conexin SKP: [" + auxdata + "]");
        u.sendToFile(2, "skp", this.data);
        tramaConecxion(u.clearDataConnection(this.data));
        tipoEquipoGPRS = 2;
    } else if (this.data.indexOf("0150") == 0) {
        u.sendToFile(5, "skp", data);
        if (registered) {
            System.out.println(
                    "Respuesta Comando [5] [" + data + "], Equipo: [" + v.getIdEquipo().getEquipo() + "]");
            processResponseComand(this.data.substring(5));
        } else {
            System.out.println("Respuesta Comando [5] [" + data + "], Equipo: [Desconocido]");
            System.out.println(
                    "Dato Enviado a Tabla de Invalidos por no estar registrado en el sistema [Desconocido].");
            dijc.create(new DatoInvalidos(3, new Date(), e.getEquipo(), this.data));
        }
        //            System.out.println("Respuesta Cmd: [" + auxdata + "]");
        //            processResponseComand(this.data.substring(5));
    } else if (this.data.indexOf("0420") == 0) {
        System.out.println("Trama SKP: [" + data + "]");
        u.sendToFile(3, "skp", this.data);
        procesarSKP(this.data.substring(5));
    } else if (this.data.indexOf("0@8 488") == 0) { // 0@8 488 
        System.out.println("Trama SKP+ -param: [" + auxdata + "]");
        u.sendToFile(3, "skp", this.data);
        tramaMinuto(this.data.substring(9));
    } else {
        if (this.data.indexOf("0@80") == 0) {
            System.out.println("Aqui");
        } else if (this.data.indexOf("0@80") == 0) {

        } else if (this.data.indexOf("0 @80") == 0) {
            System.err.println("Trama sin Procesar: [" + auxdata + "]");
            if (registered) {
                dijc.create(new DatoInvalidos(1, new Date(), e.getEquipo(), this.data));
                System.out.println("entra aqui 1");
            } else {
                System.out.println("entra aqui 2");
                dijc.create(new DatoInvalidos(1, new Date(), "", this.data));
            }
        }
    }
}

---

From source file:com.kradac.karview.netty.MyDecoder.java

@Override
protected void decode(ChannelHandlerContext chc, ByteBuf bb, List<Object> list) throws Exception {
    if (bb.readableBytes() < 2) {
        return;/*from   w ww. j ava 2 s .com*/
    }
    bb.markReaderIndex();
    int length = bb.readChar();
    if (length > 150) {
        String data = "";
        while (bb.isReadable()) {
            data += (char) bb.readByte();
        }
        bb.clear();
        if (data.contains("OK") || data.contains("handshake")) {
            if (data.contains("handshake")) {
                chc.channel().write("0%%at");
            }
            if (data.contains("OK")) {
                System.out.println("Respuesta de Comando AT [" + data + "]");
            }
        } else {
            System.err.println("Datos incorrectos enviados al Servidor [" + data + "]");
            chc.channel().disconnect();
        }
    }
    if (bb.readableBytes() < length - 2) {
        bb.resetReaderIndex();
        return;
    }
    in.writeBytes(bb);//Escribimos los bytes
    in.discardReadBytes();//
    in.retain();
    list.add(in);
    bb.clear();//vaciamos el byteBuf
}

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From source file:com.l2jmobius.commons.network.codecs.CryptCodec.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext ctx, ByteBuf msg, ByteBuf out) {
    // Check if there are any data to encrypt.
    if (!msg.isReadable()) {
        return;/*from w  ww  .j a  v a  2 s .c o  m*/
    }

    msg.resetReaderIndex();
    _crypt.encrypt(msg);
    msg.resetReaderIndex();
    out.writeBytes(msg);
}

---

From source file:com.l2jmobius.commons.network.codecs.PacketDecoder.java

License:Open Source License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) {
    if ((in == null) || !in.isReadable()) {
        return;/*from w  w  w  . ja v a2 s .  c om*/
    }

    if (in.order() != _byteOrder) {
        in = in.order(_byteOrder);
    }

    try {
        final short packetId = in.readUnsignedByte();
        if (packetId >= _incomingPackets.length) {
            LOGGER.finer("Unknown packet: " + Integer.toHexString(packetId));
            return;
        }

        final IIncomingPackets<T> incomingPacket = _incomingPackets[packetId];
        if (incomingPacket == null) {
            LOGGER.finer("Unknown packet: " + Integer.toHexString(packetId));
            return;
        }

        final IConnectionState connectionState = ctx.channel().attr(IConnectionState.ATTRIBUTE_KEY).get();
        if ((connectionState == null) || !incomingPacket.getConnectionStates().contains(connectionState)) {
            // LOGGER.warning(incomingPacket + ": Connection at invalid state: " + connectionState + " Required States: " + incomingPacket.getConnectionStates());
            return;
        }

        final IIncomingPacket<T> packet = incomingPacket.newIncomingPacket();
        if ((packet != null) && packet.read(_client, new PacketReader(in))) {
            out.add(packet);
        }
    } finally {
        // We always consider that we read whole packet.
        in.readerIndex(in.writerIndex());
    }
}

---

From source file:com.l2jmobius.gameserver.network.client.Crypt.java

License:Open Source License

@Override
public void encrypt(ByteBuf buf) {
    if (!_isEnabled) {
        _isEnabled = true;/*from w w  w.  java2s .  c om*/
        onPacketSent(buf);
        return;
    }

    onPacketSent(buf);

    int a = 0;
    while (buf.isReadable()) {
        final int b = buf.readByte() & 0xFF;
        a = b ^ _outKey[(buf.readerIndex() - 1) & 15] ^ a;
        buf.setByte(buf.readerIndex() - 1, a);
    }

    shiftKey(_outKey, buf.writerIndex());
}

---

From source file:com.l2jmobius.gameserver.network.client.Crypt.java

License:Open Source License

@Override
public void decrypt(ByteBuf buf) {
    if (!_isEnabled) {
        onPacketReceive(buf);//  w  ww  . j  av  a  2s.c om
        return;
    }

    int a = 0;
    while (buf.isReadable()) {
        final int b = buf.readByte() & 0xFF;
        buf.setByte(buf.readerIndex() - 1, b ^ _inKey[(buf.readerIndex() - 1) & 15] ^ a);
        a = b;
    }

    shiftKey(_inKey, buf.writerIndex());

    onPacketReceive(buf);
}

---

From source file:com.lambdaworks.redis.protocol.CommandHandlerTest.java

License:Apache License

@Test
public void shouldIgnoreNonReadableBuffers() throws Exception {

    ByteBuf byteBufMock = mock(ByteBuf.class);
    when(byteBufMock.isReadable()).thenReturn(false);

    sut.channelRead(context, byteBufMock);

    verify(byteBufMock, never()).release();
}

---

From source file:com.linecorp.armeria.client.encoding.ZlibStreamDecoder.java

License:Apache License

private byte[] fetchDecoderOutput() {
    CompositeByteBuf decoded = Unpooled.compositeBuffer();
    for (;;) {//  w w  w .  j a  va2s.  c  o  m
        ByteBuf buf = decoder.readInbound();
        if (buf == null) {
            break;
        }
        if (!buf.isReadable()) {
            buf.release();
            continue;
        }
        decoded.addComponent(true, buf);
    }
    byte[] ret = ByteBufUtil.getBytes(decoded);
    decoded.release();
    return ret;
}

---

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