hadoop BlockMoveTaskHandler 源码
haddop BlockMoveTaskHandler 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/sps/BlockMoveTaskHandler.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 java.io.IOException;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.hdfs.server.protocol.BlockStorageMovementCommand.BlockMovingInfo;
/**
* Interface for implementing different ways of block moving approaches. One can
* connect directly to DN and request block move, and other can talk NN to
* schedule via heart-beats.
*/
@InterfaceAudience.Private
@InterfaceStability.Evolving
public interface BlockMoveTaskHandler {
/**
* This is an interface method to handle the move tasks. BlockMovingInfo must
* contain the required info to move the block, that source location,
* destination location and storage types.
*/
void submitMoveTask(BlockMovingInfo blkMovingInfo) throws IOException;
}
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