hadoop AbstractSubClusterResolver 源码
haddop AbstractSubClusterResolver 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/resolver/AbstractSubClusterResolver.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.resolver;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.server.federation.store.records.SubClusterId;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.Map;
/**
* Partial implementation of {@link SubClusterResolver}, containing basic
* implementations of the read methods.
*/
public abstract class AbstractSubClusterResolver implements SubClusterResolver {
private Map<String, SubClusterId> nodeToSubCluster =
new ConcurrentHashMap<String, SubClusterId>();
private Map<String, Set<SubClusterId>> rackToSubClusters =
new ConcurrentHashMap<String, Set<SubClusterId>>();
@Override
public SubClusterId getSubClusterForNode(String nodename)
throws YarnException {
SubClusterId subClusterId = this.nodeToSubCluster.get(nodename);
if (subClusterId == null) {
throw new YarnException("Cannot find subClusterId for node " + nodename);
}
return subClusterId;
}
@Override
public Set<SubClusterId> getSubClustersForRack(String rackname)
throws YarnException {
if (!rackToSubClusters.containsKey(rackname)) {
throw new YarnException("Cannot resolve rack " + rackname);
}
return rackToSubClusters.get(rackname);
}
public Map<String, SubClusterId> getNodeToSubCluster() {
return nodeToSubCluster;
}
public Map<String, Set<SubClusterId>> getRackToSubClusters() {
return rackToSubClusters;
}
}
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