Example usage for io.netty.buffer ByteBuf clear

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

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Introduction

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

Prototype

public abstract ByteBuf clear();

Source Link

Document

Sets the readerIndex and writerIndex of this buffer to 0 .

Usage

From source file:org.asynchttpclient.request.body.generators.ByteArrayBodyGeneratorTest.java

License:Open Source License

@Test(groups = "standalone")
public void testSingleRead() throws IOException {
    final int srcArraySize = chunkSize - 1;
    final byte[] srcArray = new byte[srcArraySize];
    random.nextBytes(srcArray);//w  w  w.  j  a v  a  2 s  . c  o  m

    final ByteArrayBodyGenerator babGen = new ByteArrayBodyGenerator(srcArray);
    final Body body = babGen.createBody();

    final ByteBuf chunkBuffer = Unpooled.buffer(chunkSize);

    // should take 1 read to get through the srcArray
    body.transferTo(chunkBuffer);
    assertEquals(chunkBuffer.readableBytes(), srcArraySize, "bytes read");
    chunkBuffer.clear();

    assertEquals(body.transferTo(chunkBuffer), BodyState.STOP, "body at EOF");
}

From source file:org.asynchttpclient.request.body.generators.ByteArrayBodyGeneratorTest.java

License:Open Source License

@Test(groups = "standalone")
public void testMultipleReads() throws IOException {
    final int srcArraySize = (3 * chunkSize) + 42;
    final byte[] srcArray = new byte[srcArraySize];
    random.nextBytes(srcArray);/*from   ww w .ja v  a2 s  .c  o  m*/

    final ByteArrayBodyGenerator babGen = new ByteArrayBodyGenerator(srcArray);
    final Body body = babGen.createBody();

    final ByteBuf chunkBuffer = Unpooled.buffer(chunkSize);

    int reads = 0;
    int bytesRead = 0;
    while (body.transferTo(chunkBuffer) != BodyState.STOP) {
        reads += 1;
        bytesRead += chunkBuffer.readableBytes();
        chunkBuffer.clear();
    }
    assertEquals(reads, 4, "reads to drain generator");
    assertEquals(bytesRead, srcArraySize, "bytes read");
}

From source file:org.dcache.xrootd.core.XrootdHandshakeHandler.java

License:Open Source License

@Override
protected final void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (in.readableBytes() >= CLIENT_HANDSHAKE_LEN) {
        byte[] handshake = new byte[20];
        in.readBytes(handshake);/*from   w w  w . j  a va  2s  . com*/

        if (!Arrays.equals(handshake, HANDSHAKE_REQUEST)) {
            in.clear();
            LOGGER.warn("{} Received invalid handshake.", ctx.channel());
            ctx.close();
            return;
        }

        ctx.writeAndFlush(Unpooled.wrappedBuffer(response));
        ctx.channel().pipeline().remove(this);
    }
}

From source file:org.eclipse.moquette.parser.netty.SubAckDecoderTest.java

License:Open Source License

private void initHeaderQos(ByteBuf buff, int messageID, AbstractMessage.QOSType... qoss)
        throws IllegalAccessException {
    buff.clear().writeByte(AbstractMessage.SUBACK << 4)
            .writeBytes(Utils.encodeRemainingLength(2 + qoss.length));

    buff.writeShort(messageID);/*w  w w. j a  v a 2s  . c  om*/
    for (AbstractMessage.QOSType qos : qoss) {
        buff.writeByte(qos.ordinal());
    }
}

From source file:org.eclipse.moquette.parser.netty.SubscribeDecoderTest.java

License:Open Source License

private void initMultiTopic(ByteBuf buff, int messageID, SubscribeMessage.Couple... topics)
        throws IllegalAccessException {
    ByteBuf topicBuffer = Unpooled.buffer(4);
    topicBuffer.writeShort(messageID);/*from  w  w w  .  j av a 2s .c  o m*/
    for (SubscribeMessage.Couple couple : topics) {
        topicBuffer.writeBytes(Utils.encodeString(couple.getTopicFilter()));
        topicBuffer.writeByte(couple.getQos());
    }

    buff.clear().writeByte(AbstractMessage.SUBSCRIBE << 4 | (byte) 0x02)
            .writeBytes(Utils.encodeRemainingLength(topicBuffer.readableBytes()));
    buff.writeBytes(topicBuffer);
}

From source file:org.eclipse.moquette.parser.netty.SubscribeDecoderTest.java

License:Open Source License

private void initPollutedTopic(ByteBuf buff, int messageID, SubscribeMessage.Couple topic)
        throws IllegalAccessException {
    ByteBuf topicBuffer = Unpooled.buffer(4);
    topicBuffer.writeShort(messageID);//  w  ww  . ja  v a 2 s.com
    topicBuffer.writeBytes(Utils.encodeString(topic.getTopicFilter()));
    topicBuffer.writeByte(0xF0 | topic.getQos());

    buff.clear().writeByte(AbstractMessage.SUBSCRIBE << 4 | (byte) 0x02)
            .writeBytes(Utils.encodeRemainingLength(topicBuffer.readableBytes()));
    buff.writeBytes(topicBuffer);
}

From source file:org.fusesource.hawtdispatch.netty.HawtSocketChannel.java

License:Apache License

@Override
protected void doFlushByteBuffer(ByteBuf buf) throws Exception {
    if (!buf.isReadable()) {
        // Reset reader/writerIndex to 0 if the buffer is empty.
        buf.clear();
        return;//  w w  w .j av a 2s.com
    }

    for (int i = config().getWriteSpinCount() - 1; i >= 0; i--) {
        int localFlushedAmount = doWriteBytes(buf, i == 0);
        if (localFlushedAmount > 0) {
            break;
        }
        if (!buf.isReadable()) {
            // Reset reader/writerIndex to 0 if the buffer is empty.
            buf.clear();
            break;
        }
    }
}

From source file:org.hawkular.metrics.clients.ptrans.DemuxHandler.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf msg, @SuppressWarnings("rawtypes") List out)
        throws Exception {

    if (msg.readableBytes() < 5) {
        msg.clear();
        ctx.close();//from   w w  w . j a va2s . c om
        return;
    }
    ChannelPipeline pipeline = ctx.pipeline();

    String data = msg.toString(CharsetUtil.UTF_8);
    if (logger.isDebugEnabled()) {
        logger.debug("Incoming: [" + data + "]");
    }

    boolean done = false;

    if (data.contains("type=metric")) {
        pipeline.addLast(new SyslogEventDecoder());
        pipeline.addLast("forwarder", new RestForwardingHandler(configuration));
        pipeline.remove(this);
        done = true;
    } else if (!data.contains("=")) {
        String[] items = data.split(" |\\n");
        if (items.length % 3 == 0) {
            pipeline.addLast("encoder", new GraphiteEventDecoder());
            pipeline.addLast("forwarder", forwardingHandler);
            pipeline.remove(this);
            done = true;
        }
    }
    if (!done) {
        logger.warn("Unknown input [" + data + "], ignoring");
        msg.clear();
        ctx.close();
    }
}

From source file:org.hawkular.metrics.clients.ptrans.ganglia.UdpGangliaDecoder.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, DatagramPacket in, List<Object> out) throws Exception {
    ByteBuf msg = in.content();
    if (msg.readableBytes() < 5) {
        msg.clear();
        ctx.close();/* www .jav a2  s. c o  m*/
        return;
    }

    short magic = msg.getUnsignedByte(3);
    if (msg.getByte(0) == 0 && msg.getByte(1) == 0 && msg.getByte(2) == 0 && magic == 134) {

        // We have an UnsafeSuperDuperBuffer, so we need to "manually" pull the bytes from it.
        byte[] bytes = new byte[msg.readableBytes()];
        msg.readBytes(bytes);

        XdrBufferDecodingStream stream = new XdrBufferDecodingStream(bytes);
        stream.beginDecoding();
        stream.xdrDecodeInt(); // Packet id , should be 134 as in above magic => type of value
        String host = stream.xdrDecodeString();
        String metricName = stream.xdrDecodeString();
        stream.xdrDecodeInt();
        String format = stream.xdrDecodeString(); // e.g. .0f for a number
        String value;
        if (format.endsWith("f")) {
            value = String.valueOf(stream.xdrDecodeFloat());
        } else {
            value = stream.xdrDecodeString();
        }
        stream.endDecoding();

        try {
            String path = host + "." + metricName;
            Double val = Double.parseDouble(value);

            SingleMetric metric = new SingleMetric(path, System.currentTimeMillis(), val);
            out.add(metric);
        } catch (Exception e) {
            e.printStackTrace();
            msg.clear();
            ctx.close();

        }
    }

}

From source file:org.hawkular.metrics.clients.ptrans.statsd.StatsdDecoder.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, DatagramPacket msg, List<Object> out) throws Exception {
    ByteBuf buf = msg.content();

    if (buf.readableBytes() < 3) {
        // Not enough data - nothing to do.
        buf.clear();
        ctx.close();/*from  w  w w .ja  v a2 s  .  c o  m*/
        return;
    }

    String packet = buf.toString(CharsetUtil.UTF_8).trim();
    if (!packet.contains(":")) {
        buf.clear();
        ctx.close();
        return;
    }

    String name = packet.substring(0, packet.indexOf(":"));
    String remainder = packet.substring(packet.indexOf(":") + 1);
    String valString;
    String type;
    if (remainder.contains("|")) {
        valString = remainder.substring(0, remainder.indexOf("|"));
        type = remainder.substring(remainder.indexOf("|") + 1);
    } else {
        valString = remainder;
        type = "";
    }
    Double value = Double.valueOf(valString);
    SingleMetric singleMetric = new SingleMetric(name, System.currentTimeMillis(), value,
            MetricType.from(type));
    out.add(singleMetric);
}