content: /*
   * 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.kafka.jmh.coordinator;
  
  import org.apache.kafka.common.Uuid;
  import org.apache.kafka.common.message.OffsetFetchRequestData;
  import org.apache.kafka.common.metadata.TopicRecord;
  import org.apache.kafka.common.utils.LogContext;
  import org.apache.kafka.common.utils.Time;
  import org.apache.kafka.coordinator.group.Group;
  import org.apache.kafka.coordinator.group.GroupCoordinatorConfig;
  import org.apache.kafka.coordinator.group.GroupMetadataManager;
  import org.apache.kafka.coordinator.group.OffsetMetadataManager;
  import org.apache.kafka.coordinator.group.generated.OffsetCommitKey;
  import org.apache.kafka.coordinator.group.generated.OffsetCommitValue;
  import org.apache.kafka.coordinator.group.metrics.GroupCoordinatorMetricsShard;
  import org.apache.kafka.image.MetadataDelta;
  import org.apache.kafka.image.MetadataImage;
  import org.apache.kafka.image.MetadataProvenance;
  import org.apache.kafka.timeline.SnapshotRegistry;
  
  import org.openjdk.jmh.annotations.Benchmark;
  import org.openjdk.jmh.annotations.BenchmarkMode;
  import org.openjdk.jmh.annotations.Fork;
  import org.openjdk.jmh.annotations.Level;
  import org.openjdk.jmh.annotations.Measurement;
  import org.openjdk.jmh.annotations.Mode;
  import org.openjdk.jmh.annotations.OutputTimeUnit;
  import org.openjdk.jmh.annotations.Param;
  import org.openjdk.jmh.annotations.Scope;
  import org.openjdk.jmh.annotations.Setup;
  import org.openjdk.jmh.annotations.State;
  import org.openjdk.jmh.annotations.Threads;
  import org.openjdk.jmh.annotations.Warmup;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.concurrent.TimeUnit;
  
  import static org.mockito.ArgumentMatchers.anyLong;
  import static org.mockito.ArgumentMatchers.anyString;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.when;
  
  @State(Scope.Benchmark)
  @Fork(value = 1)
  @Warmup(iterations = 5)
  @Measurement(iterations = 5)
  @BenchmarkMode(Mode.AverageTime)
  @OutputTimeUnit(TimeUnit.MILLISECONDS)
  public class TransactionalOffsetFetchBenchmark {
      private static final Time TIME = Time.SYSTEM;
  
      @Param({"4000"})
      private int partitionCount;
  
      @Param({"4000"})
      private int transactionCount;
  
      private static final String GROUP_ID = "my-group-id";
      private static final String TOPIC_NAME = "my-topic-name";
  
      private OffsetMetadataManager offsetMetadataManager;
  
      /** A list of partition indexes from 0 to partitionCount - 1. */
      private List<Integer> partitionIndexes;
  
      @Setup(Level.Trial)
      public void setup() {
          LogContext logContext = new LogContext();
          MetadataDelta delta = new MetadataDelta(MetadataImage.EMPTY);
          delta.replay(new TopicRecord()
              .setTopicId(Uuid.randomUuid())
              .setName(TOPIC_NAME));
          MetadataImage image = delta.apply(MetadataProvenance.EMPTY);
  
          SnapshotRegistry snapshotRegistry = new SnapshotRegistry(logContext);
  
          GroupMetadataManager groupMetadataManager = mock(GroupMetadataManager.class);
          Group group = mock(Group.class);
          when(groupMetadataManager.group(anyString(), anyLong())).thenReturn(group);
  
          offsetMetadataManager = new OffsetMetadataManager.Builder()
              .withLogContext(logContext)
              .withSnapshotRegistry(snapshotRegistry)
              .withTime(TIME)
              .withGroupMetadataManager(groupMetadataManager)
              .withGroupCoordinatorConfig(mock(GroupCoordinatorConfig.class))
              .withMetadataImage(image)
              .withGroupCoordinatorMetricsShard(mock(GroupCoordinatorMetricsShard.class))
              .build();
  
          for (int i = 0; i < transactionCount; i++) {
              snapshotRegistry.idempotentCreateSnapshot(i);
              offsetMetadataManager.replay(
                  i,
                  3193600 + i,
                  new OffsetCommitKey()
                      .setGroup(GROUP_ID)
                      .setTopic(TOPIC_NAME)
                      .setPartition(i),
                  new OffsetCommitValue()
                      .setOffset(100)
              );
          }
  
          partitionIndexes = new ArrayList<>();
          for (int i = 0; i < partitionCount; i++) {
              partitionIndexes.add(i);
          }
      }
  
      @Benchmark
      @Threads(1)
      @OutputTimeUnit(TimeUnit.MILLISECONDS)
      public void run() {
          offsetMetadataManager.fetchOffsets(
              new OffsetFetchRequestData.OffsetFetchRequestGroup()
                  .setGroupId(GROUP_ID)
                  .setTopics(List.of(
                      new OffsetFetchRequestData.OffsetFetchRequestTopics()
                          .setName(TOPIC_NAME)
                          .setPartitionIndexes(partitionIndexes)
                  )),
              Long.MAX_VALUE
          );
      }
  }
  