Examples of org.apache.hadoop.hdfs.protocol.BlockChecksumHeader

org.apache.hadoop.hdfs.protocol.BlockChecksumHeader
The header for the OP_BLOCK_CHECKSUM datanode operation.

   * @param in
   */
  void getBlockChecksum(DataInputStream in,
      VersionAndOpcode versionAndOpcode) throws IOException {
    // header
    BlockChecksumHeader blockChecksumHeader =
        new BlockChecksumHeader(versionAndOpcode);
    blockChecksumHeader.readFields(in);
    final int namespaceId = blockChecksumHeader.getNamespaceId();
    final Block block = new Block(blockChecksumHeader.getBlockId(), 0,
            blockChecksumHeader.getGenStamp());


    DataOutputStream out = null;
    final MetaDataInputStream metadataIn = datanode.data.getMetaDataInputStream(namespaceId, block);
    final DataInputStream checksumIn = new DataInputStream(new BufferedInputStream(
        metadataIn, BUFFER_SIZE));

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                + DataTransferProtocol.OP_BLOCK_CHECKSUM +
                ", block=" + block);
          }
          
          /* Write the header */
          BlockChecksumHeader blockChecksumHeader = new BlockChecksumHeader(
              dataTransferVersion, namespaceId, block.getBlockId(),
              block.getGenerationStamp());
          blockChecksumHeader.writeVersionAndOpCode(out);
          blockChecksumHeader.write(out);
          out.flush();


          final short reply = in.readShort();
          if (reply != DataTransferProtocol.OP_STATUS_SUCCESS) {
            throw new IOException("Bad response " + reply + " for block "

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                + DataTransferProtocol.OP_BLOCK_CHECKSUM +
                ", block=" + block);
          }
          
          /* Write the header */
          BlockChecksumHeader blockChecksumHeader = new BlockChecksumHeader(
              dataTransferVersion, namespaceId, block.getBlockId(),
              block.getGenerationStamp());
          blockChecksumHeader.writeVersionAndOpCode(out);
          blockChecksumHeader.write(out);
          out.flush();


          final short reply = in.readShort();
          if (reply != DataTransferProtocol.OP_STATUS_SUCCESS) {
            throw new IOException("Bad response " + reply + " for block "

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   * @param versionAndOpcode
   */
  void getBlockCrc(DataInputStream in, VersionAndOpcode versionAndOpcode)
      throws IOException {
    // header
    BlockChecksumHeader blockChecksumHeader =
        new BlockChecksumHeader(versionAndOpcode);
    blockChecksumHeader.readFields(in);
    final int namespaceId = blockChecksumHeader.getNamespaceId();
    final Block block = new Block(blockChecksumHeader.getBlockId(), 0,
            blockChecksumHeader.getGenStamp());


    DataOutputStream out = null;


    ReplicaToRead ri = datanode.data.getReplicaToRead(namespaceId, block);
    if (ri == null) {

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   * @param in
   */
  void getBlockChecksum(DataInputStream in,
      VersionAndOpcode versionAndOpcode) throws IOException {
    // header
    BlockChecksumHeader blockChecksumHeader =
        new BlockChecksumHeader(versionAndOpcode);
    blockChecksumHeader.readFields(in);
    final int namespaceId = blockChecksumHeader.getNamespaceId();
    final Block block = new Block(blockChecksumHeader.getBlockId(), 0,
            blockChecksumHeader.getGenStamp());


    DataOutputStream out = null;
    InputStream rawStreamIn = null;
    DataInputStream streamIn = null;

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Related Classes of org.apache.hadoop.hdfs.protocol.BlockChecksumHeader

org.apache.hadoop.hdfs.DFSClient

org.apache.hadoop.hdfs.server.datanode.DataXceiver

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