Package org.apache.hadoop.hdfs.protocol.DataTransferProtocol

Examples of org.apache.hadoop.hdfs.protocol.DataTransferProtocol.PacketHeader.readFields()

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    // Read next packet if the previous packet has been read completely.
    if (dataLeft <= 0) {
      //Read packet headers.
      PacketHeader header = new PacketHeader();
      header.readFields(in);

      if (LOG.isDebugEnabled()) {
        LOG.debug("DFSClient readChunk got header " + header);
      }
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    // read the next packet
    readNextPacket();

    buf.mark();
    PacketHeader header = new PacketHeader();
    header.readFields(buf);
    int endOfHeader = buf.position();
    buf.reset();

    // Sanity check the header
    if (header.getOffsetInBlock() > replicaInfo.getNumBytes()) {
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    hdr.write(new DataOutputStream(baos));

    // Read back using DataInput
    PacketHeader readBack = new PacketHeader();
    ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
    readBack.readFields(new DataInputStream(bais));
    assertEquals(hdr, readBack);

    // Read back using ByteBuffer
    readBack = new PacketHeader();
    readBack.readFields(ByteBuffer.wrap(baos.toByteArray()));
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    readBack.readFields(new DataInputStream(bais));
    assertEquals(hdr, readBack);

    // Read back using ByteBuffer
    readBack = new PacketHeader();
    readBack.readFields(ByteBuffer.wrap(baos.toByteArray()));
    assertEquals(hdr, readBack);

    // Test sanity check for good header
    PacketHeader goodHeader = new PacketHeader(
      4,                   // size of packet
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