hadoop AbstractUsersManager 源码
haddop AbstractUsersManager 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/scheduler/AbstractUsersManager.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.yarn.server.resourcemanager.scheduler;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.yarn.api.records.ApplicationId;
/**
* {@link AbstractUsersManager} tracks users in the system.
*/
@Private
public interface AbstractUsersManager {
/**
* An application has new outstanding requests.
*
* @param user
* application user
* @param applicationId
* activated application
*/
void activateApplication(String user, ApplicationId applicationId);
/**
* An application has no more outstanding requests.
*
* @param user
* application user
* @param applicationId
* deactivated application
*/
void deactivateApplication(String user, ApplicationId applicationId);
/**
* Get number of active users i.e. users with applications which have pending
* resource requests.
*
* @return number of active users
*/
int getNumActiveUsers();
}
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