| /* |
| * 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.drill.exec.work.foreman.rm; |
| |
| import org.apache.drill.exec.physical.PhysicalPlan; |
| import org.apache.drill.exec.work.QueryWorkUnit; |
| |
| /** |
| * Manages resources for an individual query in conjunction with the |
| * global {@link ResourceManager}. Handles memory and CPU allocation. |
| * Instances of this class handle query planning and are used when the |
| * client wants to plan the query, but not execute it. An implementation |
| * of {@link QueryResourceManager} is used to both plan the query and |
| * queue it for execution. |
| * <p> |
| * This interface allows a variety of resource management strategies to |
| * exist for different purposes. |
| * <p> |
| * The methods here assume external synchronization: a single query calls |
| * the methods at known times; there are no concurrent calls. |
| */ |
| |
| public interface QueryResourceAllocator { |
| |
| /** |
| * Make any needed adjustments to the query plan before parallelization. |
| * |
| * @param plan physical plan |
| */ |
| void visitAbstractPlan(PhysicalPlan plan); |
| |
| /** |
| * Provide the manager with the physical plan and node assignments |
| * for the query to be run. This class will plan memory for the query. |
| * |
| * @param work query work unit |
| */ |
| |
| void visitPhysicalPlan(QueryWorkUnit work); |
| } |