/*
* 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.slider.server.appmaster.state;
import org.apache.hadoop.yarn.api.records.Container;
import org.apache.hadoop.yarn.api.records.Priority;
import org.apache.hadoop.yarn.util.Records;
/**
* Class containing the logic to build/split container priorities into the
* different fields used by Slider
*
* The original design here had a requestID merged with the role, to
* track outstanding requests. However, this isn't possible, so
* the request ID has been dropped. A "location specified" flag was
* added to indicate whether or not the request was for a specific location
* -though this is currently unused.
*
* The methods are effectively surplus -but retained to preserve the
* option of changing behavior in future
*/
public final class ContainerPriority {
public static int buildPriority(int role,
boolean locationSpecified) {
return (role) ;
}
public static Priority createPriority(int role,
boolean locationSpecified) {
Priority pri = Records.newRecord(Priority.class);
pri.setPriority(ContainerPriority.buildPriority(role,
locationSpecified));
return pri;
}
public static int extractRole(int priority) {
return priority ;
}
/**
* Map from a container to a role key by way of its priority
* @param container container
* @return role key
*/
public static int extractRole(Container container) {
Priority priority = container.getPriority();
assert priority != null;
return extractRole(priority.getPriority());
}
/**
* Map from a container to a role key by way of its priority
* @param container container
* @return role key
*/
public static int extractRole(Priority priorityRecord) {
return extractRole(priorityRecord.getPriority());
}
}