hadoop BlockToMarkCorrupt 源码
haddop BlockToMarkCorrupt 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/BlockToMarkCorrupt.java
/**
* 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.server.blockmanagement;
import static org.apache.hadoop.hdfs.server.blockmanagement.CorruptReplicasMap.Reason;
import org.apache.hadoop.util.Preconditions;
import org.apache.hadoop.hdfs.protocol.Block;
/**
* BlockToMarkCorrupt is used to build the "toCorrupt" list, which is a
* list of blocks that should be considered corrupt due to a block report.
*/
class BlockToMarkCorrupt {
/** The corrupted block in a datanode. */
private final Block corrupted;
/** The corresponding block stored in the BlockManager. */
private final BlockInfo stored;
/** The reason to mark corrupt. */
private final String reason;
/** The reason code to be stored */
private final CorruptReplicasMap.Reason reasonCode;
BlockToMarkCorrupt(Block corrupted, BlockInfo stored, String reason,
CorruptReplicasMap.Reason reasonCode) {
Preconditions.checkNotNull(corrupted, "corrupted is null");
Preconditions.checkNotNull(stored, "stored is null");
this.corrupted = corrupted;
this.stored = stored;
this.reason = reason;
this.reasonCode = reasonCode;
}
BlockToMarkCorrupt(Block corrupted, BlockInfo stored, long gs, String reason,
CorruptReplicasMap.Reason reasonCode) {
this(corrupted, stored, reason, reasonCode);
//the corrupted block in datanode has a different generation stamp
this.corrupted.setGenerationStamp(gs);
}
public boolean isCorruptedDuringWrite() {
return stored.getGenerationStamp() > corrupted.getGenerationStamp();
}
public Block getCorrupted() {
return corrupted;
}
public BlockInfo getStored() {
return stored;
}
public String getReason() {
return reason;
}
public Reason getReasonCode() {
return reasonCode;
}
@Override
public String toString() {
return corrupted + "("
+ (corrupted == stored ? "same as stored": "stored=" + stored) + ")";
}
}
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