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.cassandra.sidecar.metrics;
  
  import java.util.concurrent.CompletableFuture;
  import java.util.function.LongConsumer;
  
  import io.vertx.core.Future;
  
  /**
   * Provides functionality to measure time taken for operations to completed, i.e. a stopwatch. The time measured is generally used for
   * metrics collection.
   */
  public class StopWatch
  {
      private StopWatch()
      {
          throw new UnsupportedOperationException();
      }
  
      public static void measureTimeTaken(Runnable runnable, LongConsumer intervalConsumer)
      {
          long start = System.nanoTime();
          boolean success = true;
          try
          {
              runnable.run();
          }
          catch (RuntimeException rte)
          {
              success = false;
              throw rte;
          }
          finally
          {
              if (success)
              {
                  intervalConsumer.accept(System.nanoTime() - start);
              }
          }
      }
  
      public static <V> Future<V> measureTimeTaken(Future<V> future, LongConsumer intervalConsumer)
      {
          long start = System.nanoTime();
          return future.onSuccess(v -> intervalConsumer.accept(System.nanoTime() - start));
      }
  
      public static <V> CompletableFuture<V> measureTimeTaken(CompletableFuture<V> future, LongConsumer intervalConsumer)
      {
          long start = System.nanoTime();
          return future.thenApply(v -> {
              intervalConsumer.accept(System.nanoTime() - start);
              return v;
          });
      }
  }
  