hadoop PlacementManager 源码
haddop PlacementManager 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/placement/PlacementManager.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.placement;
import java.util.List;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock.ReadLock;
import java.util.concurrent.locks.ReentrantReadWriteLock.WriteLock;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.yarn.api.records.ApplicationSubmissionContext;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.classification.VisibleForTesting;
public class PlacementManager {
private static final Logger LOG =
LoggerFactory.getLogger(PlacementManager.class);
List<PlacementRule> rules;
ReadLock readLock;
WriteLock writeLock;
public PlacementManager() {
ReentrantReadWriteLock lock = new ReentrantReadWriteLock();
readLock = lock.readLock();
writeLock = lock.writeLock();
}
public void updateRules(List<PlacementRule> rules) {
writeLock.lock();
try {
this.rules = rules;
} finally {
writeLock.unlock();
}
}
public ApplicationPlacementContext placeApplication(
ApplicationSubmissionContext asc, String user, boolean recovery)
throws YarnException {
readLock.lock();
try {
if (null == rules || rules.isEmpty()) {
return null;
}
ApplicationPlacementContext placement = null;
for (PlacementRule rule : rules) {
placement = rule.getPlacementForApp(asc, user, recovery);
if (placement != null) {
break;
}
}
return placement;
} finally {
readLock.unlock();
}
}
public ApplicationPlacementContext placeApplication(
ApplicationSubmissionContext asc, String user) throws YarnException {
return placeApplication(asc, user, false);
}
@VisibleForTesting
public List<PlacementRule> getPlacementRules() {
return rules;
}
}
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hadoop ApplicationPlacementContext 源码
hadoop CSMappingPlacementRule 源码
hadoop DefaultPlacementRule 源码
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