hadoop DatanodeAdminMonitorInterface 源码
haddop DatanodeAdminMonitorInterface 代码
文件路径：/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/blockmanagement/DatanodeAdminMonitorInterface.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 org.apache.hadoop.hdfs.server.namenode.Namesystem;
import java.util.Queue;
/**
* Interface used to implement a decommission and maintenance monitor class,
* which is instantiated by the DatanodeAdminManager class.
*/
public interface DatanodeAdminMonitorInterface extends Runnable {
void stopTrackingNode(DatanodeDescriptor dn);
void startTrackingNode(DatanodeDescriptor dn);
int getPendingNodeCount();
int getTrackedNodeCount();
int getNumNodesChecked();
Queue<DatanodeDescriptor> getPendingNodes();
Queue<DatanodeDescriptor> getCancelledNodes();
void setBlockManager(BlockManager bm);
void setDatanodeAdminManager(DatanodeAdminManager dnm);
void setNameSystem(Namesystem ns);
}
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