akashorabek commented on code in PR #30630: URL: https://github.com/apache/beam/pull/30630#discussion_r1531474427
########## it/google-cloud-platform/src/main/java/org/apache/beam/it/gcp/IOStressTestBase.java: ########## @@ -0,0 +1,158 @@ +/* + * 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.beam.it.gcp; + +import com.google.cloud.Timestamp; +import java.io.IOException; +import java.io.Serializable; +import java.text.ParseException; +import java.time.Duration; +import java.util.ArrayList; +import java.util.Collection; +import java.util.List; +import java.util.Map; +import java.util.UUID; +import org.apache.beam.it.common.PipelineLauncher; +import org.apache.beam.sdk.testutils.NamedTestResult; +import org.apache.beam.sdk.testutils.metrics.IOITMetrics; +import org.apache.beam.sdk.testutils.publishing.InfluxDBSettings; +import org.apache.beam.sdk.transforms.DoFn; +import org.joda.time.Instant; + +/** Base class for IO Stress tests. */ +public class IOStressTestBase extends IOLoadTestBase { + /** + * The load will initiate at 1x, progressively increase to 2x and 4x, then decrease to 2x and + * eventually return to 1x. + */ + protected static final int[] DEFAULT_LOAD_INCREASE_ARRAY = {1, 2, 2, 4, 2, 1}; + + protected static final int DEFAULT_ROWS_PER_SECOND = 1000; + + /** + * Generates and returns a list of LoadPeriod instances representing periods of load increase + * based on the specified load increase array and total duration in minutes. + * + * @param minutesTotal The total duration in minutes for which the load periods are generated. + * @return A list of LoadPeriod instances defining periods of load increase. + */ + protected List<LoadPeriod> getLoadPeriods(int minutesTotal, int[] loadIncreaseArray) { + + List<LoadPeriod> loadPeriods = new ArrayList<>(); + long periodDurationMillis = + Duration.ofMinutes(minutesTotal / loadIncreaseArray.length).toMillis(); + long startTimeMillis = 0; + + for (int loadIncreaseMultiplier : loadIncreaseArray) { + long endTimeMillis = startTimeMillis + periodDurationMillis; + loadPeriods.add(new LoadPeriod(loadIncreaseMultiplier, startTimeMillis, endTimeMillis)); + + startTimeMillis = endTimeMillis; + } + return loadPeriods; + } + + /** + * Represents a period of time with associated load increase properties for stress testing + * scenarios. + */ + protected static class LoadPeriod implements Serializable { + private final int loadIncreaseMultiplier; + private final long periodStartMillis; + private final long periodEndMillis; + + public LoadPeriod(int loadIncreaseMultiplier, long periodStartMillis, long periodEndMin) { + this.loadIncreaseMultiplier = loadIncreaseMultiplier; + this.periodStartMillis = periodStartMillis; + this.periodEndMillis = periodEndMin; + } + + public int getLoadIncreaseMultiplier() { + return loadIncreaseMultiplier; + } + + public long getPeriodStartMillis() { + return periodStartMillis; + } + + public long getPeriodEndMillis() { + return periodEndMillis; + } + } + + /** + * Custom Apache Beam DoFn designed for use in stress testing scenarios. It introduces a dynamic + * load increase over time, multiplying the input elements based on the elapsed time since the + * start of processing. This class aims to simulate various load levels during stress testing. + */ + protected static class MultiplierDoFn<T> extends DoFn<T, T> { + private final int startMultiplier; + private final long startTimesMillis; + private final List<LoadPeriod> loadPeriods; + + public MultiplierDoFn(int startMultiplier, List<LoadPeriod> loadPeriods) { + this.startMultiplier = startMultiplier; + this.startTimesMillis = Instant.now().getMillis(); + this.loadPeriods = loadPeriods; + } + + @DoFn.ProcessElement + public void processElement( + @Element T element, OutputReceiver<T> outputReceiver, @DoFn.Timestamp Instant timestamp) { + + int multiplier = this.startMultiplier; + long elapsedTimeMillis = timestamp.getMillis() - startTimesMillis; + + for (LoadPeriod loadPeriod : loadPeriods) { + if (elapsedTimeMillis >= loadPeriod.getPeriodStartMillis() + && elapsedTimeMillis < loadPeriod.getPeriodEndMillis()) { + multiplier *= loadPeriod.getLoadIncreaseMultiplier(); + break; + } + } + for (int i = 0; i < multiplier; i++) { + outputReceiver.output(element); + } + } + } + + /** Exports test metrics to InfluxDB or BigQuery depending on the configuration. */ + protected void exportMetrics( Review Comment: Done -- This is an automated message from the Apache Git Service. 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