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.utils;
  
  import java.util.concurrent.TimeUnit;
  
  public final class FixedMonotonicClock implements MonotonicClock
  {
      private static volatile long nowInNanos = 42;
  
      public static void setNowInNanos(long nowInNanos) {
          FixedMonotonicClock.nowInNanos = nowInNanos;
      }
  
      public long now()
      {
          return nowInNanos;
      }
  
      public long error()
      {
          return 0;
      }
  
      public MonotonicClockTranslation translate()
      {
          return FakeMonotonicClockTranslation.instance;
      }
  
      public boolean isAfter(long instant)
      {
          return false;
      }
  
      public boolean isAfter(long now, long instant)
      {
          return false;
      }
  
      private static final class FakeMonotonicClockTranslation implements MonotonicClockTranslation
      {
          private static final FakeMonotonicClockTranslation instance = new FakeMonotonicClockTranslation();
  
          public long fromMillisSinceEpoch(long currentTimeMillis)
          {
              return TimeUnit.MILLISECONDS.toNanos(currentTimeMillis);
          }
  
          public long toMillisSinceEpoch(long nanoTime)
          {
              return TimeUnit.NANOSECONDS.toMillis(nanoTime);
          }
  
          public long error()
          {
              return 0;
          }
      }
  }
  