| /** |
| * 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.hdfs.DeprecatedUTF8; |
| import org.apache.hadoop.io.Writable; |
| import org.apache.hadoop.io.WritableFactories; |
| import org.apache.hadoop.io.WritableFactory; |
| |
| /** |
| * Identifies a Block uniquely across the block pools |
| */ |
| @InterfaceAudience.Private |
| @InterfaceStability.Evolving |
| public class ExtendedBlock implements Writable { |
| private String poolId; |
| private Block block; |
| |
| static { // register a ctor |
| WritableFactories.setFactory(ExtendedBlock.class, new WritableFactory() { |
| public Writable newInstance() { |
| return new ExtendedBlock(); |
| } |
| }); |
| } |
| |
| public ExtendedBlock() { |
| this(null, 0, 0, 0); |
| } |
| |
| public ExtendedBlock(final ExtendedBlock b) { |
| this(b.poolId, new Block(b.block)); |
| } |
| |
| public ExtendedBlock(final String poolId, final long blockId) { |
| this(poolId, blockId, 0, 0); |
| } |
| |
| public ExtendedBlock(String poolId, Block b) { |
| this.poolId = poolId; |
| this.block = b; |
| } |
| |
| public ExtendedBlock(final String poolId, final long blkid, final long len, |
| final long genstamp) { |
| this.poolId = poolId; |
| block = new Block(blkid, len, genstamp); |
| } |
| |
| public void write(DataOutput out) throws IOException { |
| DeprecatedUTF8.writeString(out, poolId); |
| block.writeHelper(out); |
| } |
| |
| public void readFields(DataInput in) throws IOException { |
| this.poolId = DeprecatedUTF8.readString(in); |
| block.readHelper(in); |
| } |
| |
| // Write only the identifier part of the block |
| public void writeId(DataOutput out) throws IOException { |
| DeprecatedUTF8.writeString(out, poolId); |
| block.writeId(out); |
| } |
| |
| // Read only the identifier part of the block |
| public void readId(DataInput in) throws IOException { |
| this.poolId = DeprecatedUTF8.readString(in); |
| block.readId(in); |
| } |
| |
| public String getBlockPoolId() { |
| return poolId; |
| } |
| |
| /** Returns the block file name for the block */ |
| public String getBlockName() { |
| return block.getBlockName(); |
| } |
| |
| public long getNumBytes() { |
| return block.getNumBytes(); |
| } |
| |
| public long getBlockId() { |
| return block.getBlockId(); |
| } |
| |
| public long getGenerationStamp() { |
| return block.getGenerationStamp(); |
| } |
| |
| public void setBlockId(final long bid) { |
| block.setBlockId(bid); |
| } |
| |
| public void setGenerationStamp(final long genStamp) { |
| block.setGenerationStamp(genStamp); |
| } |
| |
| public void setNumBytes(final long len) { |
| block.setNumBytes(len); |
| } |
| |
| public void set(String poolId, Block blk) { |
| this.poolId = poolId; |
| this.block = blk; |
| } |
| |
| public static Block getLocalBlock(final ExtendedBlock b) { |
| return b == null ? null : b.getLocalBlock(); |
| } |
| |
| public Block getLocalBlock() { |
| return block; |
| } |
| |
| @Override // Object |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (!(o instanceof ExtendedBlock)) { |
| return false; |
| } |
| ExtendedBlock b = (ExtendedBlock)o; |
| return b.block.equals(block) || b.poolId.equals(poolId); |
| } |
| |
| @Override // Object |
| public int hashCode() { |
| return block.hashCode(); |
| } |
| |
| @Override // Object |
| public String toString() { |
| return poolId + ":" + block; |
| } |
| } |