io.netty.buffer.ByteBuf.readableBytes()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中io.netty.buffer.ByteBuf.readableBytes()方法的一些代码示例，展示了ByteBuf.readableBytes()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ByteBuf.readableBytes()方法的具体详情如下：
包路径：io.netty.buffer.ByteBuf
类名称：ByteBuf
方法名：readableBytes

ByteBuf.readableBytes介绍

[英]Returns the number of readable bytes which is equal to (this.writerIndex - this.readerIndex).
[中]返回等于（this.writerIndex-this.readerIndex）的可读字节数。

代码示例

代码示例来源：origin: netty/netty

@Override
public int readableBytes() {
  if (terminated) {
    return buffer.readableBytes();
  } else {
    return Integer.MAX_VALUE - buffer.readerIndex();
  }
}

代码示例来源：origin: Graylog2/graylog2-server

@Override
  protected void channelRead0(ChannelHandlerContext ctx, ByteBuf msg) throws Exception {
    if (sourceInputLog.isTraceEnabled()) {
      sourceInputLog.trace("Recv network data: {} bytes via input '{}' <{}> from remote address {}",
          msg.readableBytes(), sourceInputName, sourceInputId, ctx.channel().remoteAddress());
    }
  }
}

代码示例来源：origin: alibaba/fescar

@Override
  public boolean decode(ByteBuf in) {
    int i = in.readableBytes();
    if (i < 3) {
      return false;
    }
    i -= 3;
    this.identified = (in.readByte() == 1);

    short len = in.readShort();
    if (len > 0) {
      if (i < len) {
        return false;
      }

      byte[] bs = new byte[len];
      in.readBytes(bs);
      this.setVersion(new String(bs, UTF8));
    }

    return true;
  }
}

代码示例来源：origin: apache/drill

if (component.readableBytes() > wrapSizeLimit) {
 throw new RpcException(String.format("Component Chunk size: %d is greater than the wrapSizeLimit: %d",
   component.readableBytes(), wrapSizeLimit));
component.getBytes(component.readerIndex(), origMsg, 0, component.readableBytes());
if(logger.isTraceEnabled()) {
 logger.trace("Trying to encrypt chunk of size:{} with wrapSizeLimit:{} and chunkMode: {}",
   component.readableBytes(), wrapSizeLimit);
final byte[] wrappedMsg = saslCodec.wrap(origMsg, 0, component.readableBytes());
if(logger.isTraceEnabled()) {
 logger.trace("Successfully encrypted message, original size: {} Final Size: {}",
   component.readableBytes(), wrappedMsg.length);
msg.skipBytes(component.readableBytes());
component.skipBytes(component.readableBytes());

代码示例来源：origin: Graylog2/graylog2-server

LOG.trace("Attempting to decode DNS record [{}]", dnsRecord);
try {
  final ByteBuf byteBuf = dnsRawRecord.content();
  ipAddressBytes = new byte[byteBuf.readableBytes()];
  int readerIndex = byteBuf.readerIndex();
  byteBuf.getBytes(readerIndex, ipAddressBytes);
} finally {
LOG.trace("The IP address has [{}] bytes", ipAddressBytes.length);
LOG.trace("The resulting IP address is [{}]", ipAddress.getHostAddress());

代码示例来源：origin: ethereum/ethereumj

protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws IOException {
  if (in.readableBytes() == 0) {
    loggerWire.trace("in.readableBytes() == 0");
    return;
  }
  loggerWire.trace("Decoding frame (" + in.readableBytes() + " bytes)");
  List<FrameCodec.Frame> frames = frameCodec.readFrames(in);
  // Check if a full frame was available.  If not, we'll try later when more bytes come in.
  if (frames == null || frames.isEmpty()) return;
  for (int i = 0; i < frames.size(); i++) {
    FrameCodec.Frame frame = frames.get(i);
    channel.getNodeStatistics().rlpxInMessages.add();
  }
  out.addAll(frames);
}

代码示例来源：origin: apache/hive

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out)
  throws Exception {
 if (in.readableBytes() < 4) {
  return;
 }
 in.markReaderIndex();
 int msgSize = in.readInt();
 checkSize(msgSize);
 if (in.readableBytes() < msgSize) {
  // Incomplete message in buffer.
  in.resetReaderIndex();
  return;
 }
 try {
  ByteBuffer nioBuffer = maybeDecrypt(in.nioBuffer(in.readerIndex(), msgSize));
  Input kryoIn = new Input(new ByteBufferInputStream(nioBuffer));
  Object msg = kryos.get().readClassAndObject(kryoIn);
  LOG.trace("Decoded message of type {} ({} bytes)",
    msg != null ? msg.getClass().getName() : msg, msgSize);
  out.add(msg);
 } finally {
  in.skipBytes(msgSize);
 }
}

代码示例来源：origin: runelite/runelite

@Override
public void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception
  if (in.readableBytes() < 8)
  int compressedFileSize = copy.readInt();
  if (size + 3 + breaks > in.readableBytes())
    logger.trace("Index {} archive {}: Not enough data yet {} > {}", index, file, size + 3 + breaks, in.readableBytes());
    return;
    int bytesToRead = Math.min(bytesInBlock, size - compressedData.writerIndex());
    logger.trace("{}/{}: reading block {}/{}, read so far this block: {}, file status: {}/{}",
      index, file,
      (totalRead % CHUNK_SIZE), CHUNK_SIZE,
  logger.trace("{}/{}: done downloading file, remaining buffer {}",
    index, file,
    in.readableBytes());

代码示例来源：origin: org.apache.plc4x/plc4j-protocol-s7

protected void decode(ChannelHandlerContext ctx, IsoTPMessage in, List<Object> out) {
  if (logger.isTraceEnabled()) {
    logger.trace("Got Data: {}", ByteBufUtil.hexDump(in.getUserData()));
  if (userData.readableBytes() == 0) {
    return;
  userData.readShort();  // Reserved (is always constant 0x0000)
  short tpduReference = userData.readShort();
  short headerParametersLength = userData.readShort();
  short userDataLength = userData.readShort();
  byte errorClass = 0;

代码示例来源：origin: redisson/redisson

@Override
  public Object decode(ByteBuf buf, State state) throws IOException {
    int decompressSize = buf.readInt();
    ByteBuf out = ByteBufAllocator.DEFAULT.buffer(decompressSize);
    try {
      LZ4SafeDecompressor decompressor = factory.safeDecompressor();
      ByteBuffer outBuffer = out.internalNioBuffer(out.writerIndex(), out.writableBytes());
      int pos = outBuffer.position();
      decompressor.decompress(buf.internalNioBuffer(buf.readerIndex(), buf.readableBytes()), outBuffer);
      int compressedLength = outBuffer.position() - pos;
      out.writerIndex(compressedLength);
      return innerCodec.getValueDecoder().decode(out, state);
    } finally {
      out.release();
    }
  }
};

代码示例来源：origin: weibocom/motan

private void decodeV1(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
  long startTime = System.currentTimeMillis();
  in.resetReaderIndex();
  in.skipBytes(2);// skip magic num
  byte messageType = (byte) in.readShort();
  long requestId = in.readLong();
  int dataLength = in.readInt();
  // FIXME 如果dataLength过大，可能导致问题
  if (in.readableBytes() < dataLength) {
    in.resetReaderIndex();
    return;
  }
  checkMaxContext(dataLength, ctx, messageType == MotanConstants.FLAG_REQUEST, requestId);
  byte[] data = new byte[dataLength];
  in.readBytes(data);
  decode(data, out, messageType == MotanConstants.FLAG_REQUEST, requestId).setStartTime(startTime);
}

代码示例来源：origin: qunarcorp/qmq

@Override
protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf in, List<Object> list) throws Exception {
  if (in.readableBytes() < RemotingHeader.MIN_HEADER_SIZE + RemotingHeader.LENGTH_FIELD) return;
  int magicCode = in.getInt(in.readerIndex() + RemotingHeader.LENGTH_FIELD);
  if (DEFAULT_MAGIC_CODE != magicCode) {
    throw new IOException("Illegal Data, MagicCode=" + Integer.toHexString(magicCode));
  int total = in.readInt();
  if (in.readableBytes() < total) {
    in.resetReaderIndex();
    return;
  short headerSize = in.readShort();
  RemotingHeader remotingHeader = decodeHeader(in);

代码示例来源：origin: alibaba/fescar

@Override
public boolean decode(ByteBuf in) {
  int i = in.readableBytes();
  try {
    short len = in.readShort();
    if (len > 0) {
      byte[] bs = new byte[len];
      this.setVersion(new String(bs, UTF8));
    len = in.readShort();
    if (len > 0) {
      byte[] bs = new byte[len];
      this.setApplicationId(new String(bs, UTF8));
    len = in.readShort();
    if (len > 0) {
      byte[] bs = new byte[len];
    LOGGER.debug(in.writerIndex() == in.readerIndex() ? "true" : "false" + this);

代码示例来源：origin: apache/zookeeper

if (LOG.isTraceEnabled()) {
  LOG.trace("0x{} buf {}",
      Long.toHexString(sessionId),
      ByteBufUtil.hexDump(buf));
    queuedBuffer = channel.alloc().buffer(buf.readableBytes());
  if (LOG.isTraceEnabled()) {
    LOG.trace("0x{} queuedBuffer {}",
        Long.toHexString(sessionId),
        ByteBufUtil.hexDump(queuedBuffer));
      if (LOG.isTraceEnabled()) {
        LOG.trace("Before copy {}", buf);
        queuedBuffer = channel.alloc().buffer(buf.readableBytes());

代码示例来源：origin: apache/drill

public void decode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws IOException {
  logger.trace("Channel closed before decoding the message of {} bytes", msg.readableBytes());
  msg.skipBytes(msg.readableBytes());
  return;
  if(logger.isTraceEnabled()) {
   logger.trace("Trying to decrypt the encrypted message of size: {} with maxWrappedSize", msg.readableBytes());
  msg.getBytes(msg.readerIndex(), lengthOctets.array(), 0, RpcConstants.LENGTH_FIELD_LENGTH);
  final int wrappedMsgLength = lengthOctets.getInt(0);
  msg.skipBytes(RpcConstants.LENGTH_FIELD_LENGTH);
  assert(msg.readableBytes() == wrappedMsgLength);
  msg.getBytes(msg.readerIndex(), wrappedMsg, 0, wrappedMsgLength);
  if(logger.isTraceEnabled()) {
   logger.trace("Successfully decrypted incoming message. Length after decryption: {}", decodedMsg.length);

代码示例来源：origin: whizzosoftware/WZWave

cbuf.addComponent(previousBuf.copy());
  cbuf.addComponent(in);
  cbuf.writerIndex(previousBuf.readableBytes() + in.readableBytes());
  data = cbuf;
  if (data.readableBytes() == 1 && isSingleByteFrame(data, data.readerIndex())) {
    out.add(createSingleByteFrame(data));
  } else {
    boolean foundFrame = false;
    for (int searchStartIx = data.readerIndex(); searchStartIx < data.readerIndex() + data.readableBytes(); searchStartIx++) {
      if (data.getByte(searchStartIx) == DataFrame.START_OF_FRAME) {
        int frameEndIx = scanForFrame(data, searchStartIx);
in.readBytes(in.readableBytes());
logger.trace("Done processing received data: {}", out);

代码示例来源：origin: kaaproject/kaa

@Override
public HttpResponse getResponse() {
 LOG.trace("CommandName: " + COMMAND_NAME + ": getHttpResponse..");
 ByteBuf data = Unpooled.copiedBuffer(responseBody);
 LOG.warn("Response data: {}", Arrays.toString(data.array()));
 FullHttpResponse httpResponse = new DefaultFullHttpResponse(HTTP_1_1, OK, data);
 httpResponse.headers().set(CONTENT_TYPE, CommonEpConstans.RESPONSE_CONTENT_TYPE);
 httpResponse.headers().set(CONTENT_LENGTH, data.readableBytes());
 LOG.warn("Response size: {}", data.readableBytes());
 httpResponse
   .headers()
   .set(CommonEpConstans.RESPONSE_TYPE, CommonEpConstans.RESPONSE_TYPE_OPERATION);
 if (responseSignature != null) {
  httpResponse
    .headers()
    .set(CommonEpConstans.SIGNATURE_HEADER_NAME, encodeBase64String(responseSignature));
 }
 if (isNeedConnectionClose()) {
  httpResponse.headers().set(CONNECTION, HttpHeaders.Values.CLOSE);
 } else {
  if (HttpHeaders.isKeepAlive(getRequest())) {
   httpResponse.headers().set(CONNECTION, HttpHeaders.Values.KEEP_ALIVE);
  } else {
   httpResponse.headers().set(CONNECTION, HttpHeaders.Values.CLOSE);
  }
 }
 return httpResponse;
}

代码示例来源：origin: netty/netty

@Override
public long skip(long bytes) throws IOException {
  int readable = buffer.readableBytes();
  if (readable < bytes) {
    bytes = readable;
  }
  buffer.readerIndex((int) (buffer.readerIndex() + bytes));
  return bytes;
}

代码示例来源：origin: redisson/redisson

@Override
  public Object decode(ByteBuf buf, State state) throws IOException {
    int decompressSize = buf.readInt();
    ByteBuf out = ByteBufAllocator.DEFAULT.buffer(decompressSize);
    try {
      LZ4SafeDecompressor decompressor = factory.safeDecompressor();
      ByteBuffer outBuffer = out.internalNioBuffer(out.writerIndex(), out.writableBytes());
      int pos = outBuffer.position();
      decompressor.decompress(buf.internalNioBuffer(buf.readerIndex(), buf.readableBytes()), outBuffer);
      int compressedLength = outBuffer.position() - pos;
      out.writerIndex(compressedLength);
      return innerCodec.getValueDecoder().decode(out, state);
    } finally {
      out.release();
    }
  }
};

代码示例来源：origin: alibaba/fescar

@Override
public boolean decode(ByteBuf in) {
  int leftLen = in.readableBytes();
  int read = 0;
  int xidLen = in.readShort();
  if (xidLen > 0) {
    if (leftLen < xidLen) {
  leftLen --;
  int resourceIdLen = in.readShort();
  if (resourceIdLen > 0) {
    if (leftLen < resourceIdLen) {
  int applicationDataLen = in.readInt();
  if (applicationDataLen > 0) {
    if (leftLen < applicationDataLen) {

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