| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.hadoop.hdfs.protocol.datatransfer; |
| |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.hdfs.protocol.ExtendedBlock; |
| import org.apache.hadoop.hdfs.protocol.HdfsProtoUtil; |
| import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.BaseHeaderProto; |
| import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.ChecksumProto; |
| import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.ChecksumProto.ChecksumType; |
| import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.ClientOperationHeaderProto; |
| import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.OpWriteBlockProto; |
| import org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier; |
| import org.apache.hadoop.security.token.Token; |
| import org.apache.hadoop.util.DataChecksum; |
| |
| import com.google.common.collect.BiMap; |
| import com.google.common.collect.ImmutableBiMap; |
| |
| |
| /** |
| * Static utilities for dealing with the protocol buffers used by the |
| * Data Transfer Protocol. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public abstract class DataTransferProtoUtil { |
| |
| /** |
| * Map between the internal DataChecksum identifiers and the protobuf- |
| * generated identifiers on the wire. |
| */ |
| static BiMap<Integer, ChecksumProto.ChecksumType> checksumTypeMap = |
| ImmutableBiMap.<Integer, ChecksumProto.ChecksumType>builder() |
| .put(DataChecksum.CHECKSUM_CRC32, ChecksumProto.ChecksumType.CRC32) |
| .put(DataChecksum.CHECKSUM_CRC32C, ChecksumProto.ChecksumType.CRC32C) |
| .put(DataChecksum.CHECKSUM_NULL, ChecksumProto.ChecksumType.NULL) |
| .build(); |
| |
| |
| static BlockConstructionStage fromProto( |
| OpWriteBlockProto.BlockConstructionStage stage) { |
| return BlockConstructionStage.valueOf(BlockConstructionStage.class, |
| stage.name()); |
| } |
| |
| static OpWriteBlockProto.BlockConstructionStage toProto( |
| BlockConstructionStage stage) { |
| return OpWriteBlockProto.BlockConstructionStage.valueOf( |
| stage.name()); |
| } |
| |
| public static ChecksumProto toProto(DataChecksum checksum) { |
| ChecksumType type = checksumTypeMap.get(checksum.getChecksumType()); |
| if (type == null) { |
| throw new IllegalArgumentException( |
| "Can't convert checksum to protobuf: " + checksum); |
| } |
| |
| return ChecksumProto.newBuilder() |
| .setBytesPerChecksum(checksum.getBytesPerChecksum()) |
| .setType(type) |
| .build(); |
| } |
| |
| public static DataChecksum fromProto(ChecksumProto proto) { |
| if (proto == null) return null; |
| |
| int bytesPerChecksum = proto.getBytesPerChecksum(); |
| int type = checksumTypeMap.inverse().get(proto.getType()); |
| |
| return DataChecksum.newDataChecksum(type, bytesPerChecksum); |
| } |
| |
| static ClientOperationHeaderProto buildClientHeader(ExtendedBlock blk, |
| String client, Token<BlockTokenIdentifier> blockToken) { |
| ClientOperationHeaderProto header = |
| ClientOperationHeaderProto.newBuilder() |
| .setBaseHeader(buildBaseHeader(blk, blockToken)) |
| .setClientName(client) |
| .build(); |
| return header; |
| } |
| |
| static BaseHeaderProto buildBaseHeader(ExtendedBlock blk, |
| Token<BlockTokenIdentifier> blockToken) { |
| return BaseHeaderProto.newBuilder() |
| .setBlock(HdfsProtoUtil.toProto(blk)) |
| .setToken(HdfsProtoUtil.toProto(blockToken)) |
| .build(); |
| } |
| } |