hadoop PendingAsk 源码
haddop PendingAsk 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/common/PendingAsk.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.common;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.hadoop.yarn.api.records.ResourceSizing;
import org.apache.hadoop.yarn.util.resource.Resources;
/**
* {@link PendingAsk} is the class to include minimal information of how much
* resource to ask under constraints (e.g. on one host / rack / node-attributes)
* , etc.
*/
public class PendingAsk {
private final Resource perAllocationResource;
private final int count;
public final static PendingAsk ZERO = new PendingAsk(Resources.none(), 0);
public PendingAsk(ResourceSizing sizing) {
this.perAllocationResource = sizing.getResources();
this.count = sizing.getNumAllocations();
}
public PendingAsk(Resource res, int num) {
this.perAllocationResource = res;
this.count = num;
}
public Resource getPerAllocationResource() {
return perAllocationResource;
}
public int getCount() {
return count;
}
@Override
public String toString() {
StringBuilder sb = new StringBuilder();
sb.append("<per-allocation-resource=")
.append(getPerAllocationResource())
.append(",repeat=")
.append(getCount())
.append(">");
return sb.toString();
}
}
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