| /* |
| * 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.resourcemgr.config; |
| |
| import org.apache.drill.exec.ops.QueryContext; |
| import com.google.common.base.Preconditions; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Used to keep track of selected leaf and all rejected {@link ResourcePool} for the provided query. |
| * It is used by {@link ResourcePoolImpl#visitAndSelectPool(QueueAssignmentResult, QueryContext)} to store |
| * information about all the matching and non-matching ResourcePools for a query when ResourcePool selector is |
| * evaluated against query metadata. Later it is used by |
| * {@link ResourcePool#visitAndSelectPool(QueueAssignmentResult, QueryContext)} to apply |
| * {@link org.apache.drill.exec.resourcemgr.config.selectionpolicy.QueueSelectionPolicy} to select only one queue out of all |
| * the selected queues for a query. It also provides an API to dump all the debug information to know which pools were |
| * selected and rejected for a query. |
| */ |
| public class QueueAssignmentResult { |
| private static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(QueueAssignmentResult.class); |
| |
| private final List<ResourcePool> selectedLeafPools = new ArrayList<>(); |
| |
| private final List<ResourcePool> rejectedPools = new ArrayList<>(); |
| |
| public void addSelectedPool(ResourcePool pool) { |
| Preconditions.checkState(pool.isLeafPool(), "Selected pool %s is not a leaf pool", |
| pool.getPoolName()); |
| selectedLeafPools.add(pool); |
| } |
| |
| public void addRejectedPool(ResourcePool pool) { |
| rejectedPools.add(pool); |
| } |
| |
| public List<ResourcePool> getSelectedLeafPools() { |
| return selectedLeafPools; |
| } |
| |
| public List<ResourcePool> getRejectedPools() { |
| return rejectedPools; |
| } |
| |
| public void logAssignmentResult(String queryId) { |
| logger.debug("For query {}. Details[{}]", queryId, toString()); |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder sb = new StringBuilder(); |
| sb.append("Selected Leaf Pools: {"); |
| for (ResourcePool pool : selectedLeafPools) { |
| sb.append(pool.getPoolName()).append(", "); |
| } |
| sb.append("} and Rejected pools: {"); |
| for (ResourcePool pool : rejectedPools) { |
| sb.append(pool.getPoolName()).append(", "); |
| } |
| sb.append("}"); |
| return sb.toString(); |
| } |
| } |