| /** |
| * 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; |
| |
| import org.apache.hadoop.yarn.api.records.ApplicationAttemptId; |
| import org.apache.hadoop.yarn.server.resourcemanager.rmcontainer.RMContainer; |
| |
| /** |
| * Interface for a scheduler that supports preemption/killing |
| * |
| */ |
| public interface PreemptableResourceScheduler extends ResourceScheduler { |
| |
| /** |
| * If the scheduler support container reservations, this method is used to |
| * ask the scheduler to drop the reservation for the given container. |
| * @param container Reference to reserved container allocation. |
| */ |
| void killReservedContainer(RMContainer container); |
| |
| /** |
| * Ask the scheduler to obtain back the container from a specific application |
| * by issuing a preemption request |
| * @param aid the application from which we want to get a container back |
| * @param container the container we want back |
| */ |
| void markContainerForPreemption(ApplicationAttemptId aid, RMContainer container); |
| |
| /** |
| * Ask the scheduler to forcibly interrupt the container given as input |
| * @param container |
| */ |
| void markContainerForKillable(RMContainer container); |
| |
| } |