hadoop SubClusterResolver 源码
haddop SubClusterResolver 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/SubClusterResolver.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 java.util.Set;
import org.apache.hadoop.conf.Configurable;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.server.federation.store.records.SubClusterId;
/**
* An utility that helps to determine the sub-cluster that a specified node or
* rack belongs to. All implementing classes should be thread-safe.
*/
public interface SubClusterResolver extends Configurable {
/**
* Obtain the sub-cluster that a specified node belongs to.
*
* @param nodename the node whose sub-cluster is to be determined
* @return the sub-cluster as identified by the {@link SubClusterId} that the
* node belongs to
* @throws YarnException if the node's sub-cluster cannot be resolved
*/
SubClusterId getSubClusterForNode(String nodename) throws YarnException;
/**
* Obtain the sub-clusters that have nodes on a specified rack.
*
* @param rackname the name of the rack
* @return the sub-clusters as identified by the {@link SubClusterId} that
* have nodes on the given rack
* @throws YarnException if the sub-cluster of any node on the rack cannot be
* resolved, or if the rack name is not recognized
*/
Set<SubClusterId> getSubClustersForRack(String rackname) throws YarnException;
/**
* Load the nodes to subCluster mapping from the file.
*/
void load();
}
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hadoop AbstractSubClusterResolver 源码
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