| /* |
| * 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; |
| import java.util.concurrent.atomic.AtomicLong; |
| |
| public class TestTimeSource implements TimeSource |
| { |
| private final AtomicLong timeInMillis = new AtomicLong(System.currentTimeMillis()); |
| |
| @Override |
| public long currentTimeMillis() |
| { |
| return timeInMillis.get(); |
| } |
| |
| @Override |
| public long nanoTime() |
| { |
| return timeInMillis.get() * 1_000_000; |
| } |
| |
| @Override |
| public TimeSource sleep(long sleepFor, TimeUnit unit) |
| { |
| long current = timeInMillis.get(); |
| long sleepInMillis = TimeUnit.MILLISECONDS.convert(sleepFor, unit); |
| boolean elapsed; |
| do |
| { |
| long newTime = current + sleepInMillis; |
| elapsed = timeInMillis.compareAndSet(current, newTime); |
| if (!elapsed) |
| { |
| long updated = timeInMillis.get(); |
| if (updated - current >= sleepInMillis) |
| { |
| elapsed = true; |
| } |
| else |
| { |
| sleepInMillis -= updated - current; |
| current = updated; |
| } |
| } |
| } |
| while (!elapsed); |
| return this; |
| } |
| |
| @Override |
| public TimeSource sleepUninterruptibly(long sleepFor, TimeUnit unit) |
| { |
| return sleep(sleepFor, unit); |
| } |
| } |