hadoop WeightedLocalityPolicyManager 源码
haddop WeightedLocalityPolicyManager 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/federation/policies/manager/WeightedLocalityPolicyManager.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.federation.policies.manager;
import java.nio.ByteBuffer;
import org.apache.hadoop.yarn.server.federation.policies.amrmproxy.LocalityMulticastAMRMProxyPolicy;
import org.apache.hadoop.yarn.server.federation.policies.dao.WeightedPolicyInfo;
import org.apache.hadoop.yarn.server.federation.policies.exceptions.FederationPolicyInitializationException;
import org.apache.hadoop.yarn.server.federation.policies.router.LocalityRouterPolicy;
import org.apache.hadoop.yarn.server.federation.store.records.SubClusterPolicyConfiguration;
import org.apache.hadoop.classification.VisibleForTesting;
/**
* Policy that allows operator to configure "weights" for routing. This picks a
* {@link LocalityRouterPolicy} for the router and a {@link
* LocalityMulticastAMRMProxyPolicy} for the amrmproxy as they are designed to
* work together.
*/
public class WeightedLocalityPolicyManager
extends AbstractPolicyManager {
private WeightedPolicyInfo weightedPolicyInfo;
public WeightedLocalityPolicyManager() {
//this structurally hard-codes two compatible policies for Router and
// AMRMProxy.
routerFederationPolicy = LocalityRouterPolicy.class;
amrmProxyFederationPolicy = LocalityMulticastAMRMProxyPolicy.class;
weightedPolicyInfo = new WeightedPolicyInfo();
}
@Override
public SubClusterPolicyConfiguration serializeConf()
throws FederationPolicyInitializationException {
ByteBuffer buf = weightedPolicyInfo.toByteBuffer();
return SubClusterPolicyConfiguration
.newInstance(getQueue(), this.getClass().getCanonicalName(), buf);
}
@VisibleForTesting
public WeightedPolicyInfo getWeightedPolicyInfo() {
return weightedPolicyInfo;
}
@VisibleForTesting
public void setWeightedPolicyInfo(
WeightedPolicyInfo weightedPolicyInfo) {
this.weightedPolicyInfo = weightedPolicyInfo;
}
}
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