Example usage for io.netty.buffer ByteBuf writeBytes

List of usage examples for io.netty.buffer ByteBuf writeBytes

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Introduction

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

Prototype

public abstract ByteBuf writeBytes(ByteBuffer src);

Source Link

Document

Transfers the specified source buffer's data to this buffer starting at the current writerIndex until the source buffer's position reaches its limit, and increases the writerIndex by the number of the transferred bytes.

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 {/*from  ww w  .  ja va 2 s .c  om*/
        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.PubAckEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, PubAckMessage msg, ByteBuf out) {
    ByteBuf buff = chc.alloc().buffer(4);
    try {/*from   w  w  w  .  j a  va  2 s.c  o  m*/
        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 w  w.jav a  2s  .c o  m
}

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 a2s . 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());//from  w  ww  .j  a v  a2s .  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());//from   w  w w.  j  a  v  a2 s . com
}

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   w w w. ja v a2 s  .  com*/

    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();
    }
}

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

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, SubscribeMessage message, ByteBuf out) {
    if (message.subscriptions().isEmpty()) {
        throw new IllegalArgumentException("Found a subscribe message with empty topics");
    }/*from  ww w.j  av a2 s .  co  m*/

    if (message.getQos() != AbstractMessage.QOSType.LEAST_ONE) {
        throw new IllegalArgumentException("Expected a message with QOS 1, found " + message.getQos());
    }

    ByteBuf variableHeaderBuff = chc.alloc().buffer(4);
    ByteBuf buff = null;
    try {
        variableHeaderBuff.writeShort(message.getMessageID());
        for (SubscribeMessage.Couple c : message.subscriptions()) {
            variableHeaderBuff.writeBytes(Utils.encodeString(c.topicFilter));
            variableHeaderBuff.writeByte(c.qos);
        }

        int variableHeaderSize = variableHeaderBuff.readableBytes();
        byte flags = Utils.encodeFlags(message);
        buff = chc.alloc().buffer(2 + variableHeaderSize);

        buff.writeByte(AbstractMessage.SUBSCRIBE << 4 | flags);
        buff.writeBytes(Utils.encodeRemainingLength(variableHeaderSize));
        buff.writeBytes(variableHeaderBuff);

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

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

License:Open Source License

@Override
protected void encode(ChannelHandlerContext chc, UnsubscribeMessage message, ByteBuf out) {
    if (message.topicFilters().isEmpty()) {
        throw new IllegalArgumentException("Found an unsubscribe message with empty topics");
    }/*from  w  w  w .  j av a2 s . co  m*/

    if (message.getQos() != AbstractMessage.QOSType.LEAST_ONE) {
        throw new IllegalArgumentException("Expected a message with QOS 1, found " + message.getQos());
    }

    ByteBuf variableHeaderBuff = chc.alloc().buffer(4);
    ByteBuf buff = null;
    try {
        variableHeaderBuff.writeShort(message.getMessageID());
        for (String topic : message.topicFilters()) {
            variableHeaderBuff.writeBytes(Utils.encodeString(topic));
        }

        int variableHeaderSize = variableHeaderBuff.readableBytes();
        byte flags = Utils.encodeFlags(message);
        buff = chc.alloc().buffer(2 + variableHeaderSize);

        buff.writeByte(AbstractMessage.UNSUBSCRIBE << 4 | flags);
        buff.writeBytes(Utils.encodeRemainingLength(variableHeaderSize));
        buff.writeBytes(variableHeaderBuff);

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

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

License:Open Source License

/**
 * Return the IoBuffer with string encoded as MSB, LSB and bytes array content.
 *///from   w  w  w  . j  a v a 2  s.com
public static ByteBuf encodeFixedLengthContent(byte[] content) {
    ByteBuf out = Unpooled.buffer(2);
    out.writeShort(content.length);
    out.writeBytes(content);
    return out;
}