hadoop PlacementFactory 源码
haddop PlacementFactory 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/PlacementFactory.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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.ReflectionUtils;
/**
* Factory class for creating instances of {@link PlacementRule}.
*/
@InterfaceAudience.Private
@InterfaceStability.Unstable
public final class PlacementFactory {
private static final Logger LOG =
LoggerFactory.getLogger(PlacementFactory.class);
private PlacementFactory() {
// Unused.
}
/**
* Create a new {@link PlacementRule} based on the rule class from the
* configuration. This is used to instantiate rules by the scheduler which
* does not resolve the class before this call.
* @param ruleStr The name of the class to instantiate
* @param conf The configuration object to set for the rule
* @return Created class instance
*/
public static PlacementRule getPlacementRule(String ruleStr,
Configuration conf)
throws ClassNotFoundException {
Class<? extends PlacementRule> ruleClass = Class.forName(ruleStr)
.asSubclass(PlacementRule.class);
LOG.info("Using PlacementRule implementation - " + ruleClass);
return ReflectionUtils.newInstance(ruleClass, conf);
}
/**
* Create a new {@link PlacementRule} based on the rule class from the
* configuration. This is used to instantiate rules by the scheduler which
* resolve the class before this call.
* @param ruleClass The specific class reference to instantiate
* @param initArg The config to set
* @return Created class instance
*/
public static PlacementRule getPlacementRule(
Class<? extends PlacementRule> ruleClass, Object initArg) {
LOG.info("Creating PlacementRule implementation: " + ruleClass);
PlacementRule rule = ReflectionUtils.newInstance(ruleClass, null);
rule.setConfig(initArg);
return rule;
}
}
相关信息
相关文章
hadoop ApplicationPlacementContext 源码
hadoop CSMappingPlacementRule 源码
hadoop DefaultPlacementRule 源码
hadoop FairQueuePlacementUtils 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
7、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦