import org.apache.hadoop.hdfs.protocol.proto.ClientDatanodeProtocolProtos.GetHdfsBlockLocationsRequestProto; //导入依赖的package包/类
@Override
public HdfsBlocksMetadata getHdfsBlocksMetadata(String blockPoolId,
    long[] blockIds,
    List<Token<BlockTokenIdentifier>> tokens) throws IOException {
  List<TokenProto> tokensProtos = 
      new ArrayList<TokenProto>(tokens.size());
  for (Token<BlockTokenIdentifier> t : tokens) {
    tokensProtos.add(PBHelper.convert(t));
  }
  // Build the request
  GetHdfsBlockLocationsRequestProto request = 
      GetHdfsBlockLocationsRequestProto.newBuilder()
      .setBlockPoolId(blockPoolId)
      .addAllBlockIds(Longs.asList(blockIds))
      .addAllTokens(tokensProtos)
      .build();
  // Send the RPC
  GetHdfsBlockLocationsResponseProto response;
  try {
    response = rpcProxy.getHdfsBlockLocations(NULL_CONTROLLER, request);
  } catch (ServiceException e) {
    throw ProtobufHelper.getRemoteException(e);
  }
  // List of volumes in the response
  List<ByteString> volumeIdsByteStrings = response.getVolumeIdsList();
  List<byte[]> volumeIds = new ArrayList<byte[]>(volumeIdsByteStrings.size());
  for (ByteString bs : volumeIdsByteStrings) {
    volumeIds.add(bs.toByteArray());
  }
  // Array of indexes into the list of volumes, one per block
  List<Integer> volumeIndexes = response.getVolumeIndexesList();
  // Parsed HdfsVolumeId values, one per block
  return new HdfsBlocksMetadata(blockPoolId, blockIds,
      volumeIds, volumeIndexes);
}
 

import org.apache.hadoop.hdfs.protocol.proto.ClientDatanodeProtocolProtos.GetHdfsBlockLocationsRequestProto; //导入依赖的package包/类
@Override
public HdfsBlocksMetadata getHdfsBlocksMetadata(List<ExtendedBlock> blocks,
    List<Token<BlockTokenIdentifier>> tokens) throws IOException {
  // Convert to proto objects
  List<ExtendedBlockProto> blocksProtos = 
      new ArrayList<ExtendedBlockProto>(blocks.size());
  List<TokenProto> tokensProtos = 
      new ArrayList<TokenProto>(tokens.size());
  for (ExtendedBlock b : blocks) {
    blocksProtos.add(PBHelper.convert(b));
  }
  for (Token<BlockTokenIdentifier> t : tokens) {
    tokensProtos.add(PBHelper.convert(t));
  }
  // Build the request
  GetHdfsBlockLocationsRequestProto request = 
      GetHdfsBlockLocationsRequestProto.newBuilder()
      .addAllBlocks(blocksProtos)
      .addAllTokens(tokensProtos)
      .build();
  // Send the RPC
  GetHdfsBlockLocationsResponseProto response;
  try {
    response = rpcProxy.getHdfsBlockLocations(NULL_CONTROLLER, request);
  } catch (ServiceException e) {
    throw ProtobufHelper.getRemoteException(e);
  }
  // List of volumes in the response
  List<ByteString> volumeIdsByteStrings = response.getVolumeIdsList();
  List<byte[]> volumeIds = new ArrayList<byte[]>(volumeIdsByteStrings.size());
  for (ByteString bs : volumeIdsByteStrings) {
    volumeIds.add(bs.toByteArray());
  }
  // Array of indexes into the list of volumes, one per block
  List<Integer> volumeIndexes = response.getVolumeIndexesList();
  // Parsed HdfsVolumeId values, one per block
  return new HdfsBlocksMetadata(blocks.toArray(new ExtendedBlock[] {}), 
      volumeIds, volumeIndexes);
}
 

import org.apache.hadoop.hdfs.protocol.proto.ClientDatanodeProtocolProtos.GetHdfsBlockLocationsRequestProto; //导入依赖的package包/类
@Override
public HdfsBlocksMetadata getHdfsBlocksMetadata(List<ExtendedBlock> blocks,
    List<Token<BlockTokenIdentifier>> tokens) throws IOException {
  // Convert to proto objects
  List<ExtendedBlockProto> blocksProtos =
      new ArrayList<>(blocks.size());
  List<TokenProto> tokensProtos = new ArrayList<>(tokens.size());
  for (ExtendedBlock b : blocks) {
    blocksProtos.add(PBHelper.convert(b));
  }
  for (Token<BlockTokenIdentifier> t : tokens) {
    tokensProtos.add(PBHelper.convert(t));
  }
  // Build the request
  GetHdfsBlockLocationsRequestProto request =
      GetHdfsBlockLocationsRequestProto.newBuilder()
          .addAllBlocks(blocksProtos).addAllTokens(tokensProtos).build();
  // Send the RPC
  GetHdfsBlockLocationsResponseProto response;
  try {
    response = rpcProxy.getHdfsBlockLocations(NULL_CONTROLLER, request);
  } catch (ServiceException e) {
    throw ProtobufHelper.getRemoteException(e);
  }
  // List of volumes in the response
  List<ByteString> volumeIdsByteStrings = response.getVolumeIdsList();
  List<byte[]> volumeIds = new ArrayList<>(volumeIdsByteStrings.size());
  for (ByteString bs : volumeIdsByteStrings) {
    volumeIds.add(bs.toByteArray());
  }
  // Array of indexes into the list of volumes, one per block
  List<Integer> volumeIndexes = response.getVolumeIndexesList();
  // Parsed HdfsVolumeId values, one per block
  return new HdfsBlocksMetadata(blocks.toArray(new ExtendedBlock[]{}),
      volumeIds, volumeIndexes);
}