/* * The MIT License (MIT) * Copyright (c) 2018 Microsoft Corporation * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in all * copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ package com.microsoft.azure.cosmosdb.internal.query.metrics; import org.apache.commons.lang3.time.StopWatch; import java.time.Duration; import java.time.Instant; import java.util.ArrayList; import java.util.List; import java.util.concurrent.TimeUnit; /** * Accumlator that acts as a builder of FetchExecutionRanges */ public class FetchExecutionRangeAccumulator { private final String partitionKeyRangeId; private final Instant constructionTime; private final StopWatch stopwatch; private List<FetchExecutionRange> fetchExecutionRanges; private Instant startTime; private Instant endTime; private boolean isFetching; public FetchExecutionRangeAccumulator(String partitionKeyRangeId) { this.partitionKeyRangeId = partitionKeyRangeId; this.constructionTime = Instant.now(); // This stopwatch is always running and is only used to calculate deltas that are synchronized with the construction time. this.stopwatch = new StopWatch(); stopwatch.start(); this.fetchExecutionRanges = new ArrayList<FetchExecutionRange>(); } /** * Gets the FetchExecutionRanges and resets the accumulator. * * @return the SchedulingMetricsResult. */ public List<FetchExecutionRange> getExecutionRanges() { List<FetchExecutionRange> returnValue = this.fetchExecutionRanges; this.fetchExecutionRanges = new ArrayList<>(); return returnValue; } /** * Updates the most recent start time internally. */ public void beginFetchRange() { if (!this.isFetching) { // Calculating the start time as the construction time and the stopwatch as a delta. this.startTime = this.constructionTime.plus(Duration.ofMillis(this.stopwatch.getTime(TimeUnit.MILLISECONDS))); this.isFetching = true; } } /** * Updates the most recent end time internally and constructs a new FetchExecutionRange * * @param numberOfDocuments The number of documents that were fetched for this range. * @param retryCount The number of times we retried for this fetch execution range. */ public void endFetchRange(String activityId, long numberOfDocuments, long retryCount) { if (this.isFetching) { // Calculating the end time as the construction time and the stopwatch as a delta. this.endTime = this.constructionTime.plus(Duration.ofMillis(this.stopwatch.getTime(TimeUnit.MILLISECONDS))); FetchExecutionRange fetchExecutionRange = new FetchExecutionRange( activityId, this.startTime, this.endTime, this.partitionKeyRangeId, numberOfDocuments, retryCount); this.fetchExecutionRanges.add(fetchExecutionRange); this.isFetching = false; } } }