| /* |
| * 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; |
| |
| import org.apache.druid.java.util.common.guava.LazySequence; |
| import org.apache.druid.java.util.common.guava.Sequence; |
| import org.apache.druid.java.util.common.guava.SequenceWrapper; |
| import org.apache.druid.java.util.common.guava.Sequences; |
| import org.apache.druid.java.util.common.logger.Logger; |
| import org.apache.druid.java.util.emitter.service.ServiceEmitter; |
| import org.apache.druid.query.context.ResponseContext; |
| |
| import java.util.function.Consumer; |
| import java.util.function.ObjLongConsumer; |
| |
| /** |
| */ |
| public class MetricsEmittingQueryRunner<T> implements QueryRunner<T> |
| { |
| private final ServiceEmitter emitter; |
| private final QueryToolChest<T, ? extends Query<T>> queryToolChest; |
| private final QueryRunner<T> queryRunner; |
| private final long creationTimeNs; |
| private final ObjLongConsumer<? super QueryMetrics<?>> reportMetric; |
| private final Consumer<QueryMetrics<?>> applyCustomDimensions; |
| private static final Logger log = new Logger(MetricsEmittingQueryRunner.class); |
| |
| private MetricsEmittingQueryRunner( |
| ServiceEmitter emitter, |
| QueryToolChest<T, ? extends Query<T>> queryToolChest, |
| QueryRunner<T> queryRunner, |
| long creationTimeNs, |
| ObjLongConsumer<? super QueryMetrics<?>> reportMetric, |
| Consumer<QueryMetrics<?>> applyCustomDimensions |
| ) |
| { |
| this.emitter = emitter; |
| this.queryToolChest = queryToolChest; |
| this.queryRunner = queryRunner; |
| this.creationTimeNs = creationTimeNs; |
| this.reportMetric = reportMetric; |
| this.applyCustomDimensions = applyCustomDimensions; |
| } |
| |
| public MetricsEmittingQueryRunner( |
| ServiceEmitter emitter, |
| QueryToolChest<T, ? extends Query<T>> queryToolChest, |
| QueryRunner<T> queryRunner, |
| ObjLongConsumer<? super QueryMetrics<?>> reportMetric, |
| Consumer<QueryMetrics<?>> applyCustomDimensions |
| ) |
| { |
| this(emitter, queryToolChest, queryRunner, -1, reportMetric, applyCustomDimensions); |
| } |
| |
| public MetricsEmittingQueryRunner<T> withWaitMeasuredFromNow() |
| { |
| return new MetricsEmittingQueryRunner<>( |
| emitter, |
| queryToolChest, |
| queryRunner, |
| System.nanoTime(), |
| reportMetric, |
| applyCustomDimensions |
| ); |
| } |
| |
| @Override |
| public Sequence<T> run(final QueryPlus<T> queryPlus, final ResponseContext responseContext) |
| { |
| QueryPlus<T> queryWithMetrics = queryPlus.withQueryMetrics(queryToolChest); |
| final QueryMetrics<?> queryMetrics = queryWithMetrics.getQueryMetrics(); |
| |
| applyCustomDimensions.accept(queryMetrics); |
| |
| return Sequences.wrap( |
| // Use LazySequence because want to account execution time of queryRunner.run() (it prepares the underlying |
| // Sequence) as part of the reported query time, i. e. we want to execute queryRunner.run() after |
| // `startTime = System.nanoTime();` (see below). |
| new LazySequence<>(() -> queryRunner.run(queryWithMetrics, responseContext)), |
| new SequenceWrapper() |
| { |
| private long startTimeNs; |
| |
| @Override |
| public void before() |
| { |
| startTimeNs = System.nanoTime(); |
| } |
| |
| @Override |
| public void after(boolean isDone, Throwable thrown) |
| { |
| if (thrown != null) { |
| queryMetrics.status("failed"); |
| } else if (!isDone) { |
| queryMetrics.status("short"); |
| } |
| long timeTakenNs = System.nanoTime() - startTimeNs; |
| reportMetric.accept(queryMetrics, timeTakenNs); |
| |
| if (creationTimeNs > 0) { |
| queryMetrics.reportWaitTime(startTimeNs - creationTimeNs); |
| } |
| try { |
| queryMetrics.emit(emitter); |
| } |
| catch (Exception e) { |
| // Query should not fail, because of emitter failure. Swallowing the exception. |
| log.error("Failure while trying to emit [%s] with stacktrace [%s]", emitter.toString(), e); |
| } |
| } |
| } |
| ); |
| } |
| } |