hadoop BlockMovementListener 源码
haddop BlockMovementListener 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/sps/BlockMovementListener.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.namenode.sps;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.hdfs.protocol.Block;
/**
* Interface for notifying about block movement attempt completion.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public interface BlockMovementListener {
/**
* This method used to notify to the SPS about block movement attempt
* finished. Then SPS will re-check whether it needs retry or not.
*
* @param moveAttemptFinishedBlks
* -list of movement attempt finished blocks
*/
void notifyMovementTriedBlocks(Block[] moveAttemptFinishedBlks);
}
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