| /* |
| * 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; |
| |
| /** |
| * A freely adjustable clock that can be used for unit testing. See {@link MonotonicClock#instance} how to |
| * enable this class. |
| */ |
| public class FreeRunningClock implements MonotonicClock |
| { |
| private long nanoTime; |
| private long millisSinceEpoch; |
| private long error; |
| |
| public FreeRunningClock() |
| { |
| this.nanoTime = 0; |
| } |
| |
| public FreeRunningClock(long nanoTime) |
| { |
| this.nanoTime = nanoTime; |
| } |
| |
| public FreeRunningClock(long nanoTime, long millisSinceEpoch, long error) |
| { |
| this.nanoTime = nanoTime; |
| this.millisSinceEpoch = millisSinceEpoch; |
| this.error = error; |
| } |
| |
| @Override |
| public long now() |
| { |
| return nanoTime; |
| } |
| |
| @Override |
| public long error() |
| { |
| return error; |
| } |
| |
| @Override |
| public MonotonicClockTranslation translate() |
| { |
| return new AbstractEpochSamplingClock.AlmostSameTime(millisSinceEpoch, nanoTime, error); |
| } |
| |
| @Override |
| public boolean isAfter(long instant) |
| { |
| return instant > nanoTime; |
| } |
| |
| @Override |
| public boolean isAfter(long now, long instant) |
| { |
| return now > instant; |
| } |
| |
| public void advance(long time, TimeUnit unit) |
| { |
| nanoTime += unit.toNanos(time); |
| } |
| } |