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  3. org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.ChecksumProto

Java 类org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.ChecksumProto 实例源码

项目：hadoop    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelper.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
    .setBytesPerChecksum(checksum.getBytesPerChecksum())
    .setType(type)
    .build();
}
项目：hadoop    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) return null;

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelper.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：aliyun-oss-hadoop-fs    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelperClient.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
    .setBytesPerChecksum(checksum.getBytesPerChecksum())
    .setType(type)
    .build();
}
项目：aliyun-oss-hadoop-fs    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) {
    return null;
  }

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelperClient.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：big-c    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelper.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
    .setBytesPerChecksum(checksum.getBytesPerChecksum())
    .setType(type)
    .build();
}
项目：big-c    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) return null;

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelper.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：hadoop-2.6.0-cdh5.4.3    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelper.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
    .setBytesPerChecksum(checksum.getBytesPerChecksum())
    .setType(type)
    .build();
}
项目：hadoop-2.6.0-cdh5.4.3    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) return null;

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelper.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：hadoop-plus    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final Token<BlockTokenIdentifier> blockToken,
    final String clientName,
    final DatanodeInfo[] targets,
    final DatanodeInfo source,
    final BlockConstructionStage stage,
    final int pipelineSize,
    final long minBytesRcvd,
    final long maxBytesRcvd,
    final long latestGenerationStamp,
    DataChecksum requestedChecksum) throws IOException {
  ClientOperationHeaderProto header = DataTransferProtoUtil.buildClientHeader(
      blk, clientName, blockToken);

  ChecksumProto checksumProto =
    DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto = OpWriteBlockProto.newBuilder()
    .setHeader(header)
    .addAllTargets(PBHelper.convert(targets, 1))
    .setStage(toProto(stage))
    .setPipelineSize(pipelineSize)
    .setMinBytesRcvd(minBytesRcvd)
    .setMaxBytesRcvd(maxBytesRcvd)
    .setLatestGenerationStamp(latestGenerationStamp)
    .setRequestedChecksum(checksumProto);

  if (source != null) {
    proto.setSource(PBHelper.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：hadoop-plus    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelper.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
    .setBytesPerChecksum(checksum.getBytesPerChecksum())
    .setType(type)
    .build();
}
项目：hadoop-plus    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) return null;

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelper.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：FlexMap    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelper.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
    .setBytesPerChecksum(checksum.getBytesPerChecksum())
    .setType(type)
    .build();
}
项目：FlexMap    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) return null;

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelper.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：hops    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final Token<BlockTokenIdentifier> blockToken, final String clientName,
    final DatanodeInfo[] targets, final DatanodeInfo source,
    final BlockConstructionStage stage, final int pipelineSize,
    final long minBytesRcvd, final long maxBytesRcvd,
    final long latestGenerationStamp, DataChecksum requestedChecksum)
    throws IOException {
  ClientOperationHeaderProto header =
      DataTransferProtoUtil.buildClientHeader(blk, clientName, blockToken);

  ChecksumProto checksumProto =
      DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto =
      OpWriteBlockProto.newBuilder().setHeader(header)
          .addAllTargets(PBHelper.convert(targets, 1))
          .setStage(toProto(stage)).setPipelineSize(pipelineSize)
          .setMinBytesRcvd(minBytesRcvd).setMaxBytesRcvd(maxBytesRcvd)
          .setLatestGenerationStamp(latestGenerationStamp)
          .setRequestedChecksum(checksumProto);

  if (source != null) {
    proto.setSource(PBHelper.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：hops    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelper.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
      .setBytesPerChecksum(checksum.getBytesPerChecksum()).setType(type)
      .build();
}
项目：hops    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) {
    return null;
  }

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelper.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：hadoop-TCP    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final Token<BlockTokenIdentifier> blockToken,
    final String clientName,
    final DatanodeInfo[] targets,
    final DatanodeInfo source,
    final BlockConstructionStage stage,
    final int pipelineSize,
    final long minBytesRcvd,
    final long maxBytesRcvd,
    final long latestGenerationStamp,
    DataChecksum requestedChecksum,
    final CachingStrategy cachingStrategy) throws IOException {
  ClientOperationHeaderProto header = DataTransferProtoUtil.buildClientHeader(
      blk, clientName, blockToken);

  ChecksumProto checksumProto =
    DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto = OpWriteBlockProto.newBuilder()
    .setHeader(header)
    .addAllTargets(PBHelper.convert(targets, 1))
    .setStage(toProto(stage))
    .setPipelineSize(pipelineSize)
    .setMinBytesRcvd(minBytesRcvd)
    .setMaxBytesRcvd(maxBytesRcvd)
    .setLatestGenerationStamp(latestGenerationStamp)
    .setRequestedChecksum(checksumProto)
    .setCachingStrategy(getCachingStrategy(cachingStrategy));

  if (source != null) {
    proto.setSource(PBHelper.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：hadoop-TCP    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelper.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
    .setBytesPerChecksum(checksum.getBytesPerChecksum())
    .setType(type)
    .build();
}
项目：hadoop-TCP    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) return null;

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelper.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：hardfs    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final Token<BlockTokenIdentifier> blockToken,
    final String clientName,
    final DatanodeInfo[] targets,
    final DatanodeInfo source,
    final BlockConstructionStage stage,
    final int pipelineSize,
    final long minBytesRcvd,
    final long maxBytesRcvd,
    final long latestGenerationStamp,
    DataChecksum requestedChecksum,
    final CachingStrategy cachingStrategy) throws IOException {
  ClientOperationHeaderProto header = DataTransferProtoUtil.buildClientHeader(
      blk, clientName, blockToken);

  ChecksumProto checksumProto =
    DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto = OpWriteBlockProto.newBuilder()
    .setHeader(header)
    .addAllTargets(PBHelper.convert(targets, 1))
    .setStage(toProto(stage))
    .setPipelineSize(pipelineSize)
    .setMinBytesRcvd(minBytesRcvd)
    .setMaxBytesRcvd(maxBytesRcvd)
    .setLatestGenerationStamp(latestGenerationStamp)
    .setRequestedChecksum(checksumProto)
    .setCachingStrategy(getCachingStrategy(cachingStrategy));

  if (source != null) {
    proto.setSource(PBHelper.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：hardfs    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelper.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
    .setBytesPerChecksum(checksum.getBytesPerChecksum())
    .setType(type)
    .build();
}
项目：hardfs    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) return null;

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelper.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：hadoop-on-lustre2    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final Token<BlockTokenIdentifier> blockToken,
    final String clientName,
    final DatanodeInfo[] targets,
    final DatanodeInfo source,
    final BlockConstructionStage stage,
    final int pipelineSize,
    final long minBytesRcvd,
    final long maxBytesRcvd,
    final long latestGenerationStamp,
    DataChecksum requestedChecksum,
    final CachingStrategy cachingStrategy) throws IOException {
  ClientOperationHeaderProto header = DataTransferProtoUtil.buildClientHeader(
      blk, clientName, blockToken);

  ChecksumProto checksumProto =
    DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto = OpWriteBlockProto.newBuilder()
    .setHeader(header)
    .addAllTargets(PBHelper.convert(targets, 1))
    .setStage(toProto(stage))
    .setPipelineSize(pipelineSize)
    .setMinBytesRcvd(minBytesRcvd)
    .setMaxBytesRcvd(maxBytesRcvd)
    .setLatestGenerationStamp(latestGenerationStamp)
    .setRequestedChecksum(checksumProto)
    .setCachingStrategy(getCachingStrategy(cachingStrategy));

  if (source != null) {
    proto.setSource(PBHelper.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：hadoop-on-lustre2    文件：DataTransferProtoUtil.java    
public static ChecksumProto toProto(DataChecksum checksum) {
  ChecksumTypeProto type = PBHelper.convert(checksum.getChecksumType());
  // ChecksumType#valueOf never returns null
  return ChecksumProto.newBuilder()
    .setBytesPerChecksum(checksum.getBytesPerChecksum())
    .setType(type)
    .build();
}
项目：hadoop-on-lustre2    文件：DataTransferProtoUtil.java    
public static DataChecksum fromProto(ChecksumProto proto) {
  if (proto == null) return null;

  int bytesPerChecksum = proto.getBytesPerChecksum();
  DataChecksum.Type type = PBHelper.convert(proto.getType());
  return DataChecksum.newDataChecksum(type, bytesPerChecksum);
}
项目：hadoop    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final StorageType storageType, 
    final Token<BlockTokenIdentifier> blockToken,
    final String clientName,
    final DatanodeInfo[] targets,
    final StorageType[] targetStorageTypes, 
    final DatanodeInfo source,
    final BlockConstructionStage stage,
    final int pipelineSize,
    final long minBytesRcvd,
    final long maxBytesRcvd,
    final long latestGenerationStamp,
    DataChecksum requestedChecksum,
    final CachingStrategy cachingStrategy,
    final boolean allowLazyPersist,
    final boolean pinning,
    final boolean[] targetPinnings) throws IOException {
  ClientOperationHeaderProto header = DataTransferProtoUtil.buildClientHeader(
      blk, clientName, blockToken);

  ChecksumProto checksumProto =
    DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto = OpWriteBlockProto.newBuilder()
    .setHeader(header)
    .setStorageType(PBHelper.convertStorageType(storageType))
    .addAllTargets(PBHelper.convert(targets, 1))
    .addAllTargetStorageTypes(PBHelper.convertStorageTypes(targetStorageTypes, 1))
    .setStage(toProto(stage))
    .setPipelineSize(pipelineSize)
    .setMinBytesRcvd(minBytesRcvd)
    .setMaxBytesRcvd(maxBytesRcvd)
    .setLatestGenerationStamp(latestGenerationStamp)
    .setRequestedChecksum(checksumProto)
    .setCachingStrategy(getCachingStrategy(cachingStrategy))
    .setAllowLazyPersist(allowLazyPersist)
    .setPinning(pinning)
    .addAllTargetPinnings(PBHelper.convert(targetPinnings, 1));

  if (source != null) {
    proto.setSource(PBHelper.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：aliyun-oss-hadoop-fs    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final StorageType storageType,
    final Token<BlockTokenIdentifier> blockToken,
    final String clientName,
    final DatanodeInfo[] targets,
    final StorageType[] targetStorageTypes,
    final DatanodeInfo source,
    final BlockConstructionStage stage,
    final int pipelineSize,
    final long minBytesRcvd,
    final long maxBytesRcvd,
    final long latestGenerationStamp,
    DataChecksum requestedChecksum,
    final CachingStrategy cachingStrategy,
    final boolean allowLazyPersist,
    final boolean pinning,
    final boolean[] targetPinnings) throws IOException {
  ClientOperationHeaderProto header = DataTransferProtoUtil.buildClientHeader(
      blk, clientName, blockToken);

  ChecksumProto checksumProto =
      DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto = OpWriteBlockProto.newBuilder()
      .setHeader(header)
      .setStorageType(PBHelperClient.convertStorageType(storageType))
      .addAllTargets(PBHelperClient.convert(targets, 1))
      .addAllTargetStorageTypes(
          PBHelperClient.convertStorageTypes(targetStorageTypes, 1))
      .setStage(toProto(stage))
      .setPipelineSize(pipelineSize)
      .setMinBytesRcvd(minBytesRcvd)
      .setMaxBytesRcvd(maxBytesRcvd)
      .setLatestGenerationStamp(latestGenerationStamp)
      .setRequestedChecksum(checksumProto)
      .setCachingStrategy(getCachingStrategy(cachingStrategy))
      .setAllowLazyPersist(allowLazyPersist)
      .setPinning(pinning)
      .addAllTargetPinnings(PBHelperClient.convert(targetPinnings, 1));

  if (source != null) {
    proto.setSource(PBHelperClient.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：big-c    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final StorageType storageType, 
    final Token<BlockTokenIdentifier> blockToken,
    final String clientName,
    final DatanodeInfo[] targets,
    final StorageType[] targetStorageTypes, 
    final DatanodeInfo source,
    final BlockConstructionStage stage,
    final int pipelineSize,
    final long minBytesRcvd,
    final long maxBytesRcvd,
    final long latestGenerationStamp,
    DataChecksum requestedChecksum,
    final CachingStrategy cachingStrategy,
    final boolean allowLazyPersist,
    final boolean pinning,
    final boolean[] targetPinnings) throws IOException {
  ClientOperationHeaderProto header = DataTransferProtoUtil.buildClientHeader(
      blk, clientName, blockToken);

  ChecksumProto checksumProto =
    DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto = OpWriteBlockProto.newBuilder()
    .setHeader(header)
    .setStorageType(PBHelper.convertStorageType(storageType))
    .addAllTargets(PBHelper.convert(targets, 1))
    .addAllTargetStorageTypes(PBHelper.convertStorageTypes(targetStorageTypes, 1))
    .setStage(toProto(stage))
    .setPipelineSize(pipelineSize)
    .setMinBytesRcvd(minBytesRcvd)
    .setMaxBytesRcvd(maxBytesRcvd)
    .setLatestGenerationStamp(latestGenerationStamp)
    .setRequestedChecksum(checksumProto)
    .setCachingStrategy(getCachingStrategy(cachingStrategy))
    .setAllowLazyPersist(allowLazyPersist)
    .setPinning(pinning)
    .addAllTargetPinnings(PBHelper.convert(targetPinnings, 1));

  if (source != null) {
    proto.setSource(PBHelper.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：hadoop-2.6.0-cdh5.4.3    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final StorageType storageType, 
    final Token<BlockTokenIdentifier> blockToken,
    final String clientName,
    final DatanodeInfo[] targets,
    final StorageType[] targetStorageTypes, 
    final DatanodeInfo source,
    final BlockConstructionStage stage,
    final int pipelineSize,
    final long minBytesRcvd,
    final long maxBytesRcvd,
    final long latestGenerationStamp,
    DataChecksum requestedChecksum,
    final CachingStrategy cachingStrategy,
    final boolean allowLazyPersist) throws IOException {
  ClientOperationHeaderProto header = DataTransferProtoUtil.buildClientHeader(
      blk, clientName, blockToken);

  ChecksumProto checksumProto =
    DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto = OpWriteBlockProto.newBuilder()
    .setHeader(header)
    .setStorageType(PBHelper.convertStorageType(storageType))
    .addAllTargets(PBHelper.convert(targets, 1))
    .addAllTargetStorageTypes(PBHelper.convertStorageTypes(targetStorageTypes, 1))
    .setStage(toProto(stage))
    .setPipelineSize(pipelineSize)
    .setMinBytesRcvd(minBytesRcvd)
    .setMaxBytesRcvd(maxBytesRcvd)
    .setLatestGenerationStamp(latestGenerationStamp)
    .setRequestedChecksum(checksumProto)
    .setCachingStrategy(getCachingStrategy(cachingStrategy))
    .setAllowLazyPersist(allowLazyPersist);

  if (source != null) {
    proto.setSource(PBHelper.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：FlexMap    文件：Sender.java    
@Override
public void writeBlock(final ExtendedBlock blk,
    final StorageType storageType, 
    final Token<BlockTokenIdentifier> blockToken,
    final String clientName,
    final DatanodeInfo[] targets,
    final StorageType[] targetStorageTypes, 
    final DatanodeInfo source,
    final BlockConstructionStage stage,
    final int pipelineSize,
    final long minBytesRcvd,
    final long maxBytesRcvd,
    final long latestGenerationStamp,
    DataChecksum requestedChecksum,
    final CachingStrategy cachingStrategy,
    final boolean allowLazyPersist) throws IOException {
  ClientOperationHeaderProto header = DataTransferProtoUtil.buildClientHeader(
      blk, clientName, blockToken);

  ChecksumProto checksumProto =
    DataTransferProtoUtil.toProto(requestedChecksum);

  OpWriteBlockProto.Builder proto = OpWriteBlockProto.newBuilder()
    .setHeader(header)
    .setStorageType(PBHelper.convertStorageType(storageType))
    .addAllTargets(PBHelper.convert(targets, 1))
    .addAllTargetStorageTypes(PBHelper.convertStorageTypes(targetStorageTypes, 1))
    .setStage(toProto(stage))
    .setPipelineSize(pipelineSize)
    .setMinBytesRcvd(minBytesRcvd)
    .setMaxBytesRcvd(maxBytesRcvd)
    .setLatestGenerationStamp(latestGenerationStamp)
    .setRequestedChecksum(checksumProto)
    .setCachingStrategy(getCachingStrategy(cachingStrategy))
    .setAllowLazyPersist(allowLazyPersist);

  if (source != null) {
    proto.setSource(PBHelper.convertDatanodeInfo(source));
  }

  send(out, Op.WRITE_BLOCK, proto.build());
}
项目：hbase    文件：FanOutOneBlockAsyncDFSOutputHelper.java    
private static List<Future<Channel>> connectToDataNodes(Configuration conf, DFSClient client,
    String clientName, LocatedBlock locatedBlock, long maxBytesRcvd, long latestGS,
    BlockConstructionStage stage, DataChecksum summer, EventLoopGroup eventLoopGroup,
    Class<? extends Channel> channelClass) {
  Enum<?>[] storageTypes = locatedBlock.getStorageTypes();
  DatanodeInfo[] datanodeInfos = locatedBlock.getLocations();
  boolean connectToDnViaHostname =
      conf.getBoolean(DFS_CLIENT_USE_DN_HOSTNAME, DFS_CLIENT_USE_DN_HOSTNAME_DEFAULT);
  int timeoutMs = conf.getInt(DFS_CLIENT_SOCKET_TIMEOUT_KEY, READ_TIMEOUT);
  ExtendedBlock blockCopy = new ExtendedBlock(locatedBlock.getBlock());
  blockCopy.setNumBytes(locatedBlock.getBlockSize());
  ClientOperationHeaderProto header = ClientOperationHeaderProto.newBuilder()
      .setBaseHeader(BaseHeaderProto.newBuilder().setBlock(PB_HELPER.convert(blockCopy))
          .setToken(PB_HELPER.convert(locatedBlock.getBlockToken())))
      .setClientName(clientName).build();
  ChecksumProto checksumProto = DataTransferProtoUtil.toProto(summer);
  OpWriteBlockProto.Builder writeBlockProtoBuilder = OpWriteBlockProto.newBuilder()
      .setHeader(header).setStage(OpWriteBlockProto.BlockConstructionStage.valueOf(stage.name()))
      .setPipelineSize(1).setMinBytesRcvd(locatedBlock.getBlock().getNumBytes())
      .setMaxBytesRcvd(maxBytesRcvd).setLatestGenerationStamp(latestGS)
      .setRequestedChecksum(checksumProto)
      .setCachingStrategy(CachingStrategyProto.newBuilder().setDropBehind(true).build());
  List<Future<Channel>> futureList = new ArrayList<>(datanodeInfos.length);
  for (int i = 0; i < datanodeInfos.length; i++) {
    DatanodeInfo dnInfo = datanodeInfos[i];
    Enum<?> storageType = storageTypes[i];
    Promise<Channel> promise = eventLoopGroup.next().newPromise();
    futureList.add(promise);
    String dnAddr = dnInfo.getXferAddr(connectToDnViaHostname);
    new Bootstrap().group(eventLoopGroup).channel(channelClass)
        .option(CONNECT_TIMEOUT_MILLIS, timeoutMs).handler(new ChannelInitializer<Channel>() {

          @Override
          protected void initChannel(Channel ch) throws Exception {
            // we need to get the remote address of the channel so we can only move on after
            // channel connected. Leave an empty implementation here because netty does not allow
            // a null handler.
          }
        }).connect(NetUtils.createSocketAddr(dnAddr)).addListener(new ChannelFutureListener() {

          @Override
          public void operationComplete(ChannelFuture future) throws Exception {
            if (future.isSuccess()) {
              initialize(conf, future.channel(), dnInfo, storageType, writeBlockProtoBuilder,
                timeoutMs, client, locatedBlock.getBlockToken(), promise);
            } else {
              promise.tryFailure(future.cause());
            }
          }
        });
  }
  return futureList;
}