hadoop SimpleCandidateNodeSet 源码
haddop SimpleCandidateNodeSet 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/scheduler/placement/SimpleCandidateNodeSet.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.scheduler.placement;
import org.apache.hadoop.thirdparty.com.google.common.collect.ImmutableMap;
import org.apache.hadoop.yarn.api.records.NodeId;
import org.apache.hadoop.yarn.api.records.NodeLabel;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.SchedulerNode;
import java.util.Collections;
import java.util.Map;
/**
* A simple CandidateNodeSet which keeps an unordered map
*/
public class SimpleCandidateNodeSet<N extends SchedulerNode>
implements CandidateNodeSet<N> {
private Map<NodeId, N> map;
private String partition;
public SimpleCandidateNodeSet(N node) {
if (null != node) {
// Only one node in the initial CandidateNodeSet
this.map = ImmutableMap.of(node.getNodeID(), node);
this.partition = node.getPartition();
} else {
this.map = Collections.emptyMap();
this.partition = NodeLabel.DEFAULT_NODE_LABEL_PARTITION;
}
}
public SimpleCandidateNodeSet(Map<NodeId, N> map, String partition) {
this.map = map;
this.partition = partition;
}
@Override
public Map<NodeId, N> getAllNodes() {
return map;
}
@Override
public long getVersion() {
return 0L;
}
@Override
public String getPartition() {
return partition;
}
}
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