Example usage for io.netty.buffer ByteBuf writeByte

Introduction

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

Prototype

public abstract ByteBuf writeByte(int value);

Source Link

Document

Sets the specified byte at the current writerIndex and increases the writerIndex by 1 in this buffer.

Usage

From source file:com.dempe.chat.common.mqtt.codec.ConnectEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, ConnectMessage message, ByteBuf out) {
    ByteBuf staticHeaderBuff = chc.alloc().buffer(12);
    ByteBuf buff = chc.alloc().buffer();
    ByteBuf variableHeaderBuff = chc.alloc().buffer(12);
    try {/* w ww. jav  a 2 s .  co m*/
        staticHeaderBuff.writeBytes(Utils.encodeString("MQIsdp"));

        //version 
        staticHeaderBuff.writeByte(0x03);

        //connection flags and Strings
        byte connectionFlags = 0;
        if (message.isCleanSession()) {
            connectionFlags |= 0x02;
        }
        if (message.isWillFlag()) {
            connectionFlags |= 0x04;
        }
        connectionFlags |= ((message.getWillQos() & 0x03) << 3);
        if (message.isWillRetain()) {
            connectionFlags |= 0x020;
        }
        if (message.isPasswordFlag()) {
            connectionFlags |= 0x040;
        }
        if (message.isUserFlag()) {
            connectionFlags |= 0x080;
        }
        staticHeaderBuff.writeByte(connectionFlags);

        //Keep alive timer
        staticHeaderBuff.writeShort(message.getKeepAlive());

        //Variable part
        if (message.getClientID() != null) {
            variableHeaderBuff.writeBytes(Utils.encodeString(message.getClientID()));
            if (message.isWillFlag()) {
                variableHeaderBuff.writeBytes(Utils.encodeString(message.getWillTopic()));
                variableHeaderBuff.writeBytes(Utils.encodeFixedLengthContent(message.getWillMessage()));
            }
            if (message.isUserFlag() && message.getUsername() != null) {
                variableHeaderBuff.writeBytes(Utils.encodeString(message.getUsername()));
                if (message.isPasswordFlag() && message.getPassword() != null) {
                    variableHeaderBuff.writeBytes(Utils.encodeFixedLengthContent(message.getPassword()));
                }
            }
        }

        int variableHeaderSize = variableHeaderBuff.readableBytes();
        buff.writeByte(AbstractMessage.CONNECT << 4);
        buff.writeBytes(Utils.encodeRemainingLength(12 + variableHeaderSize));
        buff.writeBytes(staticHeaderBuff).writeBytes(variableHeaderBuff);

        out.writeBytes(buff);
    } finally {
        staticHeaderBuff.release();
        buff.release();
        variableHeaderBuff.release();
    }
}

From source file:com.dempe.chat.common.mqtt.codec.DisconnectEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, DisconnectMessage msg, ByteBuf out) {
    out.writeByte(AbstractMessage.DISCONNECT << 4).writeByte(0);
}

From source file:com.dempe.chat.common.mqtt.codec.PingReqEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, PingReqMessage msg, ByteBuf out) {
    out.writeByte(AbstractMessage.PINGREQ << 4).writeByte(0);
}

From source file:com.dempe.chat.common.mqtt.codec.PingRespEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, PingRespMessage msg, ByteBuf out) {
    out.writeByte(AbstractMessage.PINGRESP << 4).writeByte(0);
}

From source file:com.dempe.chat.common.mqtt.codec.PubAckEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, PubAckMessage msg, ByteBuf out) {
    ByteBuf buff = chc.alloc().buffer(4);
    try {/*  w w  w  .ja  v  a2 s .  c om*/
        buff.writeByte(AbstractMessage.PUBACK << 4);
        buff.writeBytes(Utils.encodeRemainingLength(2));
        buff.writeShort(msg.getMessageID());
        out.writeBytes(buff);
    } finally {
        buff.release();
    }
}

From source file:com.dempe.chat.common.mqtt.codec.PubCompEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, PubCompMessage msg, ByteBuf out) {
    out.writeByte(AbstractMessage.PUBCOMP << 4);
    out.writeBytes(Utils.encodeRemainingLength(2));
    out.writeShort(msg.getMessageID());//from   w  ww  . j a  v  a2s  . c om
}

From source file:com.dempe.chat.common.mqtt.codec.PublishEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext ctx, PublishMessage message, ByteBuf out) {
    if (message.getQos() == AbstractMessage.QOSType.RESERVED) {
        throw new IllegalArgumentException("Found a message with RESERVED Qos");
    }/*from w w w .  j  a  v  a2 s .  c om*/
    if (message.getTopicName() == null || message.getTopicName().isEmpty()) {
        throw new IllegalArgumentException("Found a message with empty or null topic name");
    }

    ByteBuf variableHeaderBuff = ctx.alloc().buffer(2);
    ByteBuf buff = null;
    try {
        variableHeaderBuff.writeBytes(Utils.encodeString(message.getTopicName()));
        if (message.getQos() == AbstractMessage.QOSType.LEAST_ONE
                || message.getQos() == AbstractMessage.QOSType.EXACTLY_ONCE) {
            if (message.getMessageID() == null) {
                throw new IllegalArgumentException("Found a message with QOS 1 or 2 and not MessageID setted");
            }
            variableHeaderBuff.writeShort(message.getMessageID());
        }
        variableHeaderBuff.writeBytes(message.getPayload());
        int variableHeaderSize = variableHeaderBuff.readableBytes();
        byte flags = Utils.encodeFlags(message);
        buff = ctx.alloc().buffer(2 + variableHeaderSize);
        buff.writeByte(AbstractMessage.PUBLISH << 4 | flags);
        buff.writeBytes(Utils.encodeRemainingLength(variableHeaderSize));
        buff.writeBytes(variableHeaderBuff);
        out.writeBytes(buff);
    } catch (Exception e) {
        LOGGER.error(e.getMessage(), e);
    } finally {
        variableHeaderBuff.release();
        if (buff != null) {
            buff.release();
        }
    }
}

From source file:com.dempe.chat.common.mqtt.codec.PubRecEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, PubRecMessage msg, ByteBuf out) {
    out.writeByte(AbstractMessage.PUBREC << 4);
    out.writeBytes(Utils.encodeRemainingLength(2));
    out.writeShort(msg.getMessageID());// w ww .  j  a v  a  2  s .c  o m
}

From source file:com.dempe.chat.common.mqtt.codec.PubRelEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, PubRelMessage msg, ByteBuf out) {
    out.writeByte(AbstractMessage.PUBREL << 4 | 0x02);
    out.writeBytes(Utils.encodeRemainingLength(2));
    out.writeShort(msg.getMessageID());// w w  w .  j  a v a  2  s.co m
}

From source file:com.dempe.chat.common.mqtt.codec.SubAckEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, SubAckMessage message, ByteBuf out) {
    if (message.types().isEmpty()) {
        throw new IllegalArgumentException("Found a suback message with empty topics");
    }/*from  www  . ja  v a 2s  .  co m*/

    int variableHeaderSize = 2 + message.types().size();
    ByteBuf buff = chc.alloc().buffer(6 + variableHeaderSize);
    try {
        buff.writeByte(AbstractMessage.SUBACK << 4);
        buff.writeBytes(Utils.encodeRemainingLength(variableHeaderSize));
        buff.writeShort(message.getMessageID());
        for (AbstractMessage.QOSType c : message.types()) {
            buff.writeByte(c.byteValue());
        }

        out.writeBytes(buff);
    } finally {
        buff.release();
    }
}