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.common.utils;
  
  import org.apache.kafka.common.errors.TimeoutException;
  
  import java.util.function.Supplier;
  
  /**
   * A time implementation that uses the system clock and sleep call. Use `Time.SYSTEM` instead of creating an instance
   * of this class.
   */
  class SystemTime implements Time {
      private static final SystemTime SYSTEM_TIME = new SystemTime();
  
      public static SystemTime getSystemTime() {
          return SYSTEM_TIME;
      }
  
      @Override
      public long milliseconds() {
          return System.currentTimeMillis();
      }
  
      @Override
      public long nanoseconds() {
          return System.nanoTime();
      }
  
      @Override
      public void sleep(long ms) {
          Utils.sleep(ms);
      }
  
      @Override
      public void waitObject(Object obj, Supplier<Boolean> condition, long deadlineMs) throws InterruptedException {
          synchronized (obj) {
              while (true) {
                  if (condition.get())
                      return;
  
                  long currentTimeMs = milliseconds();
                  if (currentTimeMs >= deadlineMs)
                      throw new TimeoutException("Condition not satisfied before deadline");
  
                  obj.wait(deadlineMs - currentTimeMs);
              }
          }
      }
  
      private SystemTime() {
  
      }
  }
  