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.common;
  
  import org.apache.kafka.common.Node;
  import org.apache.kafka.common.PartitionInfo;
  import org.apache.kafka.common.TopicPartition;
  import org.apache.kafka.common.protocol.Errors;
  import org.apache.kafka.common.requests.MetadataResponse;
  
  import org.openjdk.jmh.annotations.Benchmark;
  import org.openjdk.jmh.annotations.BenchmarkMode;
  import org.openjdk.jmh.annotations.Fork;
  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.Warmup;
  import org.openjdk.jmh.runner.Runner;
  import org.openjdk.jmh.runner.RunnerException;
  import org.openjdk.jmh.runner.options.OptionsBuilder;
  
  import java.util.Collections;
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Optional;
  import java.util.concurrent.TimeUnit;
  import java.util.stream.Collectors;
  import java.util.stream.IntStream;
  
  @State(Scope.Benchmark)
  @Fork(value = 1)
  @Warmup(iterations = 3, time = 5)
  @Measurement(iterations = 5, time = 5)
  @BenchmarkMode(Mode.AverageTime)
  @OutputTimeUnit(TimeUnit.NANOSECONDS)
  public class MetadataResponseBenchmark {
  
      @Param({"10", "500", "1000"})
      private int nodes;
  
      private MetadataResponse.PartitionMetadata metadata;
      private Map<Integer, Node> nodesById;
  
      @Setup
      public void setup() {
          metadata = new MetadataResponse.PartitionMetadata(Errors.UNKNOWN_SERVER_ERROR,
                  new TopicPartition("benchmark", 42),
                  Optional.of(4),
                  Optional.of(42),
                  IntStream.range(0, nodes).boxed().collect(Collectors.toList()),
                  IntStream.range(0, nodes).filter(i1 -> i1 % 3 != 0).boxed().collect(Collectors.toList()),
                  IntStream.range(0, nodes).filter(i2 -> i2 % 3 == 0).boxed().collect(Collectors.toList()));
          nodesById = new HashMap<>(nodes);
          for (int i = 0; i < nodes; i++) {
              nodesById.put(i, new Node(i, "localhost", 1234));
          }
          nodesById = Collections.unmodifiableMap(nodesById);
      }
  
      @Benchmark
      public PartitionInfo toPartitionInfo() {
          return MetadataResponse.toPartitionInfo(metadata, nodesById);
      }
  
      public static void main(String[] args) throws RunnerException {
          new Runner(new OptionsBuilder().include(MetadataResponseBenchmark.class.getSimpleName()).build()).run();
      }
  
  }
  