hadoop FairSchedulerInfo 源码
haddop FairSchedulerInfo 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/webapp/dao/FairSchedulerInfo.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.webapp.dao;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlTransient;
import javax.xml.bind.annotation.XmlType;
import org.apache.hadoop.yarn.api.records.ApplicationAttemptId;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FSAppAttempt;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairScheduler;
@XmlRootElement(name = "fairScheduler")
@XmlType(name = "fairScheduler")
@XmlAccessorType(XmlAccessType.FIELD)
public class FairSchedulerInfo extends SchedulerInfo {
public static final int INVALID_FAIR_SHARE = -1;
private FairSchedulerQueueInfo rootQueue;
@XmlTransient
private FairScheduler scheduler;
public FairSchedulerInfo() {
} // JAXB needs this
public FairSchedulerInfo(FairScheduler fs) {
scheduler = fs;
rootQueue = new FairSchedulerQueueInfo(scheduler.getQueueManager().
getRootQueue(), scheduler);
}
/**
* Get the fair share assigned to the appAttemptId.
* @param appAttemptId
* @return The fair share assigned to the appAttemptId,
* <code>FairSchedulerInfo#INVALID_FAIR_SHARE</code> if the scheduler does
* not know about this application attempt.
*/
public long getAppFairShare(ApplicationAttemptId appAttemptId) {
FSAppAttempt fsAppAttempt = scheduler.getSchedulerApp(appAttemptId);
return fsAppAttempt == null ?
INVALID_FAIR_SHARE : fsAppAttempt.getFairShare().getMemorySize();
}
public FairSchedulerQueueInfo getRootQueueInfo() {
return rootQueue;
}
}
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