| /** |
| * 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; |
| |
| import java.io.DataInput; |
| import java.io.DataOutput; |
| import java.io.IOException; |
| |
| import org.apache.hadoop.classification.InterfaceAudience; |
| import org.apache.hadoop.classification.InterfaceStability; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableFactories; |
| import org.apache.hadoop.io.WritableFactory; |
| |
| /** |
| * A block and the full path information to the block data file and |
| * the metadata file stored on the local file system. |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class BlockLocalPathInfo implements Writable { |
| static final WritableFactory FACTORY = new WritableFactory() { |
| public Writable newInstance() { return new BlockLocalPathInfo(); } |
| }; |
| static { // register a ctor |
| WritableFactories.setFactory(BlockLocalPathInfo.class, FACTORY); |
| } |
| |
| private ExtendedBlock block; |
| private String localBlockPath = ""; // local file storing the data |
| private String localMetaPath = ""; // local file storing the checksum |
| |
| public BlockLocalPathInfo() {} |
| |
| /** |
| * Constructs BlockLocalPathInfo. |
| * @param b The block corresponding to this lock path info. |
| * @param file Block data file. |
| * @param metafile Metadata file for the block. |
| */ |
| public BlockLocalPathInfo(ExtendedBlock b, String file, String metafile) { |
| block = b; |
| localBlockPath = file; |
| localMetaPath = metafile; |
| } |
| |
| /** |
| * Get the Block data file. |
| * @return Block data file. |
| */ |
| public String getBlockPath() {return localBlockPath;} |
| |
| /** |
| * Get the Block metadata file. |
| * @return Block metadata file. |
| */ |
| public String getMetaPath() {return localMetaPath;} |
| |
| @Override |
| public void write(DataOutput out) throws IOException { |
| block.write(out); |
| Text.writeString(out, localBlockPath); |
| Text.writeString(out, localMetaPath); |
| } |
| |
| @Override |
| public void readFields(DataInput in) throws IOException { |
| block = new ExtendedBlock(); |
| block.readFields(in); |
| localBlockPath = Text.readString(in); |
| localMetaPath = Text.readString(in); |
| } |
| |
| /** |
| * Get number of bytes in the block. |
| * @return Number of bytes in the block. |
| */ |
| public long getNumBytes() { |
| return block.getNumBytes(); |
| } |
| } |