| /* |
| * 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.druid.query; |
| |
| /** |
| * An implementation of {@link PrioritizedCallable} that also lets caller get access to associated {@link QueryRunner} |
| * It is used in implementations of {@link QueryRunnerFactory} |
| * @param <T> - Type of result of {@link #call()} method |
| * @param <V> - Type of {@link org.apache.druid.java.util.common.guava.Sequence} of rows returned by {@link QueryRunner} |
| */ |
| public interface PrioritizedQueryRunnerCallable<T, V> extends PrioritizedCallable<T> |
| { |
| /** |
| * This method can be used by the extensions to get the runner that the given query execution task corresponds to. |
| * That in turn can be used to fetch any state associated with the QueryRunner such as the segment info for example. |
| * Extensions can carry any state from custom implementation of QuerySegmentWalker to a |
| * custom implementation of {@link QueryProcessingPool#submitRunnerTask(PrioritizedQueryRunnerCallable)} |
| */ |
| QueryRunner<V> getRunner(); |
| } |
