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.connect;
  
  import org.apache.kafka.connect.source.SourceRecord;
  import org.apache.kafka.connect.transforms.ReplaceField;
  
  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.Warmup;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.concurrent.TimeUnit;
  import java.util.stream.Collectors;
  import java.util.stream.IntStream;
  
  
  /**
   * This benchmark tests the performance of the {@link ReplaceField} {@link org.apache.kafka.connect.transforms.Transformation SMT}
   * when configured with a large number of include and exclude fields and applied on a {@link SourceRecord} containing a similarly
   * large number of fields.
   */
  @State(Scope.Benchmark)
  @Fork(value = 1)
  @Warmup(iterations = 3)
  @Measurement(iterations = 5)
  @BenchmarkMode(Mode.AverageTime)
  @OutputTimeUnit(TimeUnit.NANOSECONDS)
  public class ReplaceFieldBenchmark {
  
      @Param({"100", "1000", "10000"})
      private int valueFieldCount;
      @Param({"1", "100", "10000"})
      private int includeExcludeFieldCount;
      private ReplaceField<SourceRecord> replaceFieldSmt;
      private SourceRecord record;
  
      @Setup(Level.Trial)
      public void setup() {
          this.replaceFieldSmt = new ReplaceField.Value<>();
          Map<String, String> replaceFieldConfigs = new HashMap<>();
          replaceFieldConfigs.put("exclude",
                  IntStream.range(0, 2 * includeExcludeFieldCount).filter(x -> (x & 1) == 0).mapToObj(x -> "Field-" + x).collect(Collectors.joining(",")));
          replaceFieldConfigs.put("include",
                  IntStream.range(0, 2 * includeExcludeFieldCount).filter(x -> (x & 1) == 1).mapToObj(x -> "Field-" + x).collect(Collectors.joining(",")));
          replaceFieldSmt.configure(replaceFieldConfigs);
  
          Map<String, Object> value = new HashMap<>();
          IntStream.range(0, valueFieldCount).forEach(x -> value.put("Field-" + x, new Object()));
          this.record = new SourceRecord(null, null, null, null, null, value);
      }
  
      @Benchmark
      public void includeExcludeReplaceFieldBenchmark() {
          replaceFieldSmt.apply(record);
      }
  }
  