Package org.apache.hadoop.hdfs.protocol.datatransfer

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

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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);

    assertTrue(hdr.sanityCheck(99));
    assertFalse(hdr.sanityCheck(100));
  }
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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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    if (dataLeft == 0 &&
        pos + bytesToRead >= bytesNeededToFinish) {

      // Read header
      PacketHeader hdr = new PacketHeader();
      hdr.readFields(in);

      if (!hdr.isLastPacketInBlock() ||
          hdr.getDataLen() != 0) {
        throw new IOException("Expected empty end-of-read packet! Header: " +
                              hdr);
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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);

    assertTrue(hdr.sanityCheck(99));
    assertFalse(hdr.sanityCheck(100));
  }
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