| /* |
| * 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 { |
| |
| // bit that represents whether location is specified |
| static final int NOLOCATION = 1 << 30; |
| |
| public static int buildPriority(int role, |
| boolean locationSpecified) { |
| int location = locationSpecified ? 0 : NOLOCATION; |
| return role | location; |
| } |
| |
| |
| 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 >= NOLOCATION ? priority^NOLOCATION : 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()); |
| } |
| |
| } |