content: /*
   * Copyright 2021-2022 Alibaba Group Holding Ltd.
   *
   *    Licensed 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 com.aliyun.fastmodel.benchmarks;
  
  import java.time.Duration;
  import java.util.concurrent.ArrayBlockingQueue;
  import java.util.concurrent.ExecutorService;
  import java.util.concurrent.ThreadPoolExecutor;
  import java.util.concurrent.TimeUnit;
  
  import com.google.common.base.Stopwatch;
  import lombok.extern.slf4j.Slf4j;
  
  /**
   * Desc:
   *
   * @author panguanjing
   * @date 2021/4/1
   */
  @Slf4j
  public class PerformanceUtil {
      /**
       * create executor
       *
       * @param numOfThreads
       * @param second
       * @param queueSize
       * @return
       */
      public static ExecutorService createExecutor(int numOfThreads, long second, Integer queueSize) {
          return new ThreadPoolExecutor(
              numOfThreads, numOfThreads,
              second,
              TimeUnit.SECONDS,
              new ArrayBlockingQueue<>(queueSize),
              r -> {
                  Thread t = new Thread("PerformanceTest-Thread");
                  t.setDaemon(true);
                  return t;
              }
          );
      }
  
      public static Long getCost(PerformanceExec performanceExec, TimeUnit timeUnit) {
          Stopwatch stopwatch = Stopwatch.createStarted();
          performanceExec.execute();
          if (timeUnit == TimeUnit.MILLISECONDS) {
              return stopwatch.elapsed(TimeUnit.MILLISECONDS);
          } else if (timeUnit == TimeUnit.NANOSECONDS) {
              return stopwatch.elapsed(TimeUnit.NANOSECONDS);
          }
          throw new IllegalArgumentException("unsupported timeunit with:" + timeUnit);
      }
  
  }
  