Java 类org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetBlockLocationsResponseProto.Builder 实例源码

@Override
public GetBlockLocationsResponseProto getBlockLocations(
    RpcController controller, GetBlockLocationsRequestProto req)
    throws ServiceException {
  try {
    LocatedBlocks b = server.getBlockLocations(req.getSrc(), req.getOffset(),
        req.getLength());
    Builder builder = GetBlockLocationsResponseProto
        .newBuilder();
    if (b != null) {
      builder.setLocations(PBHelper.convert(b)).build();
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public AppendResponseProto append(RpcController controller,
    AppendRequestProto req) throws ServiceException {
  try {
    EnumSetWritable<CreateFlag> flags = req.hasFlag() ?
        PBHelper.convertCreateFlag(req.getFlag()) :
        new EnumSetWritable<>(EnumSet.of(CreateFlag.APPEND));
    LastBlockWithStatus result = server.append(req.getSrc(),
        req.getClientName(), flags);
    AppendResponseProto.Builder builder = AppendResponseProto.newBuilder();
    if (result.getLastBlock() != null) {
      builder.setBlock(PBHelper.convert(result.getLastBlock()));
    }
    if (result.getFileStatus() != null) {
      builder.setStat(PBHelper.convert(result.getFileStatus()));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetDelegationTokenResponseProto getDelegationToken(
    RpcController controller, GetDelegationTokenRequestProto req)
    throws ServiceException {
  try {
    Token<DelegationTokenIdentifier> token = server
        .getDelegationToken(new Text(req.getRenewer()));
    GetDelegationTokenResponseProto.Builder rspBuilder = 
        GetDelegationTokenResponseProto.newBuilder();
    if (token != null) {
      rspBuilder.setToken(PBHelper.convert(token));
    }
    return rspBuilder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetDataEncryptionKeyResponseProto getDataEncryptionKey(
    RpcController controller, GetDataEncryptionKeyRequestProto request)
    throws ServiceException {
  try {
    GetDataEncryptionKeyResponseProto.Builder builder = 
        GetDataEncryptionKeyResponseProto.newBuilder();
    DataEncryptionKey encryptionKey = server.getDataEncryptionKey();
    if (encryptionKey != null) {
      builder.setDataEncryptionKey(PBHelper.convert(encryptionKey));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public CreateSnapshotResponseProto createSnapshot(RpcController controller,
    CreateSnapshotRequestProto req) throws ServiceException {
  try {
    final CreateSnapshotResponseProto.Builder builder
        = CreateSnapshotResponseProto.newBuilder();
    final String snapshotPath = server.createSnapshot(req.getSnapshotRoot(),
        req.hasSnapshotName()? req.getSnapshotName(): null);
    if (snapshotPath != null) {
      builder.setSnapshotPath(snapshotPath);
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListCacheDirectivesResponseProto listCacheDirectives(
    RpcController controller, ListCacheDirectivesRequestProto request)
        throws ServiceException {
  try {
    CacheDirectiveInfo filter =
        PBHelper.convert(request.getFilter());
    BatchedEntries<CacheDirectiveEntry> entries =
      server.listCacheDirectives(request.getPrevId(), filter);
    ListCacheDirectivesResponseProto.Builder builder =
        ListCacheDirectivesResponseProto.newBuilder();
    builder.setHasMore(entries.hasMore());
    for (int i=0, n=entries.size(); i<n; i++) {
      builder.addElements(PBHelper.convert(entries.get(i)));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListCachePoolsResponseProto listCachePools(RpcController controller,
    ListCachePoolsRequestProto request) throws ServiceException {
  try {
    BatchedEntries<CachePoolEntry> entries =
      server.listCachePools(request.getPrevPoolName());
    ListCachePoolsResponseProto.Builder responseBuilder =
      ListCachePoolsResponseProto.newBuilder();
    responseBuilder.setHasMore(entries.hasMore());
    for (int i=0, n=entries.size(); i<n; i++) {
      responseBuilder.addEntries(PBHelper.convert(entries.get(i)));
    }
    return responseBuilder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetEZForPathResponseProto getEZForPath(
    RpcController controller, GetEZForPathRequestProto req)
    throws ServiceException {
  try {
    GetEZForPathResponseProto.Builder builder =
        GetEZForPathResponseProto.newBuilder();
    final EncryptionZone ret = server.getEZForPath(req.getSrc());
    if (ret != null) {
      builder.setZone(PBHelper.convert(ret));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListEncryptionZonesResponseProto listEncryptionZones(
  RpcController controller, ListEncryptionZonesRequestProto req)
  throws ServiceException {
  try {
    BatchedEntries<EncryptionZone> entries = server
        .listEncryptionZones(req.getId());
    ListEncryptionZonesResponseProto.Builder builder =
        ListEncryptionZonesResponseProto.newBuilder();
    builder.setHasMore(entries.hasMore());
    for (int i=0; i<entries.size(); i++) {
      builder.addZones(PBHelper.convert(entries.get(i)));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetStoragePoliciesResponseProto getStoragePolicies(
    RpcController controller, GetStoragePoliciesRequestProto request)
    throws ServiceException {
  try {
    BlockStoragePolicy[] policies = server.getStoragePolicies();
    GetStoragePoliciesResponseProto.Builder builder =
        GetStoragePoliciesResponseProto.newBuilder();
    if (policies == null) {
      return builder.build();
    }
    for (BlockStoragePolicy policy : policies) {
      builder.addPolicies(PBHelper.convert(policy));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetBlockLocationsResponseProto getBlockLocations(
    RpcController controller, GetBlockLocationsRequestProto req)
    throws ServiceException {
  try {
    LocatedBlocks b = server.getBlockLocations(req.getSrc(), req.getOffset(),
        req.getLength());
    Builder builder = GetBlockLocationsResponseProto
        .newBuilder();
    if (b != null) {
      builder.setLocations(PBHelperClient.convert(b)).build();
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public AppendResponseProto append(RpcController controller,
    AppendRequestProto req) throws ServiceException {
  try {
    EnumSetWritable<CreateFlag> flags = req.hasFlag() ?
        PBHelperClient.convertCreateFlag(req.getFlag()) :
        new EnumSetWritable<>(EnumSet.of(CreateFlag.APPEND));
    LastBlockWithStatus result = server.append(req.getSrc(),
        req.getClientName(), flags);
    AppendResponseProto.Builder builder = AppendResponseProto.newBuilder();
    if (result.getLastBlock() != null) {
      builder.setBlock(PBHelperClient.convertLocatedBlock(
          result.getLastBlock()));
    }
    if (result.getFileStatus() != null) {
      builder.setStat(PBHelperClient.convert(result.getFileStatus()));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetDelegationTokenResponseProto getDelegationToken(
    RpcController controller, GetDelegationTokenRequestProto req)
    throws ServiceException {
  try {
    Token<DelegationTokenIdentifier> token = server
        .getDelegationToken(new Text(req.getRenewer()));
    GetDelegationTokenResponseProto.Builder rspBuilder = 
        GetDelegationTokenResponseProto.newBuilder();
    if (token != null) {
      rspBuilder.setToken(PBHelperClient.convert(token));
    }
    return rspBuilder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetDataEncryptionKeyResponseProto getDataEncryptionKey(
    RpcController controller, GetDataEncryptionKeyRequestProto request)
    throws ServiceException {
  try {
    GetDataEncryptionKeyResponseProto.Builder builder = 
        GetDataEncryptionKeyResponseProto.newBuilder();
    DataEncryptionKey encryptionKey = server.getDataEncryptionKey();
    if (encryptionKey != null) {
      builder.setDataEncryptionKey(PBHelperClient.convert(encryptionKey));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public CreateSnapshotResponseProto createSnapshot(RpcController controller,
    CreateSnapshotRequestProto req) throws ServiceException {
  try {
    final CreateSnapshotResponseProto.Builder builder
        = CreateSnapshotResponseProto.newBuilder();
    final String snapshotPath = server.createSnapshot(req.getSnapshotRoot(),
        req.hasSnapshotName()? req.getSnapshotName(): null);
    if (snapshotPath != null) {
      builder.setSnapshotPath(snapshotPath);
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListCacheDirectivesResponseProto listCacheDirectives(
    RpcController controller, ListCacheDirectivesRequestProto request)
        throws ServiceException {
  try {
    CacheDirectiveInfo filter =
        PBHelperClient.convert(request.getFilter());
    BatchedEntries<CacheDirectiveEntry> entries =
      server.listCacheDirectives(request.getPrevId(), filter);
    ListCacheDirectivesResponseProto.Builder builder =
        ListCacheDirectivesResponseProto.newBuilder();
    builder.setHasMore(entries.hasMore());
    for (int i=0, n=entries.size(); i<n; i++) {
      builder.addElements(PBHelperClient.convert(entries.get(i)));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListCachePoolsResponseProto listCachePools(RpcController controller,
    ListCachePoolsRequestProto request) throws ServiceException {
  try {
    BatchedEntries<CachePoolEntry> entries =
      server.listCachePools(request.getPrevPoolName());
    ListCachePoolsResponseProto.Builder responseBuilder =
      ListCachePoolsResponseProto.newBuilder();
    responseBuilder.setHasMore(entries.hasMore());
    for (int i=0, n=entries.size(); i<n; i++) {
      responseBuilder.addEntries(PBHelperClient.convert(entries.get(i)));
    }
    return responseBuilder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetEZForPathResponseProto getEZForPath(
    RpcController controller, GetEZForPathRequestProto req)
    throws ServiceException {
  try {
    GetEZForPathResponseProto.Builder builder =
        GetEZForPathResponseProto.newBuilder();
    final EncryptionZone ret = server.getEZForPath(req.getSrc());
    if (ret != null) {
      builder.setZone(PBHelperClient.convert(ret));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListEncryptionZonesResponseProto listEncryptionZones(
  RpcController controller, ListEncryptionZonesRequestProto req)
  throws ServiceException {
  try {
    BatchedEntries<EncryptionZone> entries = server
        .listEncryptionZones(req.getId());
    ListEncryptionZonesResponseProto.Builder builder =
        ListEncryptionZonesResponseProto.newBuilder();
    builder.setHasMore(entries.hasMore());
    for (int i=0; i<entries.size(); i++) {
      builder.addZones(PBHelperClient.convert(entries.get(i)));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetStoragePoliciesResponseProto getStoragePolicies(
    RpcController controller, GetStoragePoliciesRequestProto request)
    throws ServiceException {
  try {
    BlockStoragePolicy[] policies = server.getStoragePolicies();
    GetStoragePoliciesResponseProto.Builder builder =
        GetStoragePoliciesResponseProto.newBuilder();
    if (policies == null) {
      return builder.build();
    }
    for (BlockStoragePolicy policy : policies) {
      builder.addPolicies(PBHelperClient.convert(policy));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetBlockLocationsResponseProto getBlockLocations(
    RpcController controller, GetBlockLocationsRequestProto req)
    throws ServiceException {
  try {
    LocatedBlocks b = server.getBlockLocations(req.getSrc(), req.getOffset(),
        req.getLength());
    Builder builder = GetBlockLocationsResponseProto
        .newBuilder();
    if (b != null) {
      builder.setLocations(PBHelper.convert(b)).build();
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public AppendResponseProto append(RpcController controller,
    AppendRequestProto req) throws ServiceException {
  try {
    EnumSetWritable<CreateFlag> flags = req.hasFlag() ?
        PBHelper.convertCreateFlag(req.getFlag()) :
        new EnumSetWritable<>(EnumSet.of(CreateFlag.APPEND));
    LastBlockWithStatus result = server.append(req.getSrc(),
        req.getClientName(), flags);
    AppendResponseProto.Builder builder = AppendResponseProto.newBuilder();
    if (result.getLastBlock() != null) {
      builder.setBlock(PBHelper.convert(result.getLastBlock()));
    }
    if (result.getFileStatus() != null) {
      builder.setStat(PBHelper.convert(result.getFileStatus()));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetDelegationTokenResponseProto getDelegationToken(
    RpcController controller, GetDelegationTokenRequestProto req)
    throws ServiceException {
  try {
    Token<DelegationTokenIdentifier> token = server
        .getDelegationToken(new Text(req.getRenewer()));
    GetDelegationTokenResponseProto.Builder rspBuilder = 
        GetDelegationTokenResponseProto.newBuilder();
    if (token != null) {
      rspBuilder.setToken(PBHelper.convert(token));
    }
    return rspBuilder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetDataEncryptionKeyResponseProto getDataEncryptionKey(
    RpcController controller, GetDataEncryptionKeyRequestProto request)
    throws ServiceException {
  try {
    GetDataEncryptionKeyResponseProto.Builder builder = 
        GetDataEncryptionKeyResponseProto.newBuilder();
    DataEncryptionKey encryptionKey = server.getDataEncryptionKey();
    if (encryptionKey != null) {
      builder.setDataEncryptionKey(PBHelper.convert(encryptionKey));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public CreateSnapshotResponseProto createSnapshot(RpcController controller,
    CreateSnapshotRequestProto req) throws ServiceException {
  try {
    final CreateSnapshotResponseProto.Builder builder
        = CreateSnapshotResponseProto.newBuilder();
    final String snapshotPath = server.createSnapshot(req.getSnapshotRoot(),
        req.hasSnapshotName()? req.getSnapshotName(): null);
    if (snapshotPath != null) {
      builder.setSnapshotPath(snapshotPath);
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListCacheDirectivesResponseProto listCacheDirectives(
    RpcController controller, ListCacheDirectivesRequestProto request)
        throws ServiceException {
  try {
    CacheDirectiveInfo filter =
        PBHelper.convert(request.getFilter());
    BatchedEntries<CacheDirectiveEntry> entries =
      server.listCacheDirectives(request.getPrevId(), filter);
    ListCacheDirectivesResponseProto.Builder builder =
        ListCacheDirectivesResponseProto.newBuilder();
    builder.setHasMore(entries.hasMore());
    for (int i=0, n=entries.size(); i<n; i++) {
      builder.addElements(PBHelper.convert(entries.get(i)));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListCachePoolsResponseProto listCachePools(RpcController controller,
    ListCachePoolsRequestProto request) throws ServiceException {
  try {
    BatchedEntries<CachePoolEntry> entries =
      server.listCachePools(request.getPrevPoolName());
    ListCachePoolsResponseProto.Builder responseBuilder =
      ListCachePoolsResponseProto.newBuilder();
    responseBuilder.setHasMore(entries.hasMore());
    for (int i=0, n=entries.size(); i<n; i++) {
      responseBuilder.addEntries(PBHelper.convert(entries.get(i)));
    }
    return responseBuilder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetEZForPathResponseProto getEZForPath(
    RpcController controller, GetEZForPathRequestProto req)
    throws ServiceException {
  try {
    GetEZForPathResponseProto.Builder builder =
        GetEZForPathResponseProto.newBuilder();
    final EncryptionZone ret = server.getEZForPath(req.getSrc());
    if (ret != null) {
      builder.setZone(PBHelper.convert(ret));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListEncryptionZonesResponseProto listEncryptionZones(
  RpcController controller, ListEncryptionZonesRequestProto req)
  throws ServiceException {
  try {
    BatchedEntries<EncryptionZone> entries = server
        .listEncryptionZones(req.getId());
    ListEncryptionZonesResponseProto.Builder builder =
        ListEncryptionZonesResponseProto.newBuilder();
    builder.setHasMore(entries.hasMore());
    for (int i=0; i<entries.size(); i++) {
      builder.addZones(PBHelper.convert(entries.get(i)));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetStoragePoliciesResponseProto getStoragePolicies(
    RpcController controller, GetStoragePoliciesRequestProto request)
    throws ServiceException {
  try {
    BlockStoragePolicy[] policies = server.getStoragePolicies();
    GetStoragePoliciesResponseProto.Builder builder =
        GetStoragePoliciesResponseProto.newBuilder();
    if (policies == null) {
      return builder.build();
    }
    for (BlockStoragePolicy policy : policies) {
      builder.addPolicies(PBHelper.convert(policy));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetBlockLocationsResponseProto getBlockLocations(
    RpcController controller, GetBlockLocationsRequestProto req)
    throws ServiceException {
  try {
    LocatedBlocks b = server.getBlockLocations(req.getSrc(), req.getOffset(),
        req.getLength());
    Builder builder = GetBlockLocationsResponseProto
        .newBuilder();
    if (b != null) {
      builder.setLocations(PBHelper.convert(b)).build();
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetDelegationTokenResponseProto getDelegationToken(
    RpcController controller, GetDelegationTokenRequestProto req)
    throws ServiceException {
  try {
    Token<DelegationTokenIdentifier> token = server
        .getDelegationToken(new Text(req.getRenewer()));
    GetDelegationTokenResponseProto.Builder rspBuilder = 
        GetDelegationTokenResponseProto.newBuilder();
    if (token != null) {
      rspBuilder.setToken(PBHelper.convert(token));
    }
    return rspBuilder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetDataEncryptionKeyResponseProto getDataEncryptionKey(
    RpcController controller, GetDataEncryptionKeyRequestProto request)
    throws ServiceException {
  try {
    GetDataEncryptionKeyResponseProto.Builder builder = 
        GetDataEncryptionKeyResponseProto.newBuilder();
    DataEncryptionKey encryptionKey = server.getDataEncryptionKey();
    if (encryptionKey != null) {
      builder.setDataEncryptionKey(PBHelper.convert(encryptionKey));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public CreateSnapshotResponseProto createSnapshot(RpcController controller,
    CreateSnapshotRequestProto req) throws ServiceException {
  try {
    final CreateSnapshotResponseProto.Builder builder
        = CreateSnapshotResponseProto.newBuilder();
    final String snapshotPath = server.createSnapshot(req.getSnapshotRoot(),
        req.hasSnapshotName()? req.getSnapshotName(): null);
    if (snapshotPath != null) {
      builder.setSnapshotPath(snapshotPath);
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListCacheDirectivesResponseProto listCacheDirectives(
    RpcController controller, ListCacheDirectivesRequestProto request)
        throws ServiceException {
  try {
    CacheDirectiveInfo filter =
        PBHelper.convert(request.getFilter());
    BatchedEntries<CacheDirectiveEntry> entries =
      server.listCacheDirectives(request.getPrevId(), filter);
    ListCacheDirectivesResponseProto.Builder builder =
        ListCacheDirectivesResponseProto.newBuilder();
    builder.setHasMore(entries.hasMore());
    for (int i=0, n=entries.size(); i<n; i++) {
      builder.addElements(PBHelper.convert(entries.get(i)));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListCachePoolsResponseProto listCachePools(RpcController controller,
    ListCachePoolsRequestProto request) throws ServiceException {
  try {
    BatchedEntries<CachePoolEntry> entries =
      server.listCachePools(request.getPrevPoolName());
    ListCachePoolsResponseProto.Builder responseBuilder =
      ListCachePoolsResponseProto.newBuilder();
    responseBuilder.setHasMore(entries.hasMore());
    for (int i=0, n=entries.size(); i<n; i++) {
      responseBuilder.addEntries(PBHelper.convert(entries.get(i)));
    }
    return responseBuilder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetEZForPathResponseProto getEZForPath(
    RpcController controller, GetEZForPathRequestProto req)
    throws ServiceException {
  try {
    GetEZForPathResponseProto.Builder builder =
        GetEZForPathResponseProto.newBuilder();
    final EncryptionZone ret = server.getEZForPath(req.getSrc());
    if (ret != null) {
      builder.setZone(PBHelper.convert(ret));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public ListEncryptionZonesResponseProto listEncryptionZones(
  RpcController controller, ListEncryptionZonesRequestProto req)
  throws ServiceException {
  try {
    BatchedEntries<EncryptionZone> entries = server
        .listEncryptionZones(req.getId());
    ListEncryptionZonesResponseProto.Builder builder =
        ListEncryptionZonesResponseProto.newBuilder();
    builder.setHasMore(entries.hasMore());
    for (int i=0; i<entries.size(); i++) {
      builder.addZones(PBHelper.convert(entries.get(i)));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetStoragePoliciesResponseProto getStoragePolicies(
    RpcController controller, GetStoragePoliciesRequestProto request)
    throws ServiceException {
  try {
    BlockStoragePolicy[] policies = server.getStoragePolicies();
    GetStoragePoliciesResponseProto.Builder builder =
        GetStoragePoliciesResponseProto.newBuilder();
    if (policies == null) {
      return builder.build();
    }
    for (BlockStoragePolicy policy : policies) {
      builder.addPolicies(PBHelper.convert(policy));
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}

@Override
public GetBlockLocationsResponseProto getBlockLocations(
    RpcController controller, GetBlockLocationsRequestProto req)
    throws ServiceException {
  try {
    LocatedBlocks b = server.getBlockLocations(req.getSrc(), req.getOffset(),
        req.getLength());
    Builder builder = GetBlockLocationsResponseProto
        .newBuilder();
    if (b != null) {
      builder.setLocations(PBHelper.convert(b)).build();
    }
    return builder.build();
  } catch (IOException e) {
    throw new ServiceException(e);
  }
}