/*
* 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 java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
/**
* A clock that you can manually advance by calling sleep
*/
public class MockTime implements Time {
private final long autoTickMs;
// Values from `nanoTime` and `currentTimeMillis` are not comparable, so we store them separately to allow tests
// using this class to detect bugs where this is incorrectly assumed to be true
private final AtomicLong timeMs;
private final AtomicLong highResTimeNs;
public MockTime() {
this(0);
}
public MockTime(long autoTickMs) {
this(autoTickMs, System.currentTimeMillis(), System.nanoTime());
}
public MockTime(long autoTickMs, long currentTimeMs, long currentHighResTimeNs) {
this.timeMs = new AtomicLong(currentTimeMs);
this.highResTimeNs = new AtomicLong(currentHighResTimeNs);
this.autoTickMs = autoTickMs;
}
@Override
public long milliseconds() {
maybeSleep(autoTickMs);
return timeMs.get();
}
@Override
public long nanoseconds() {
maybeSleep(autoTickMs);
return highResTimeNs.get();
}
@Override
public long hiResClockMs() {
return TimeUnit.NANOSECONDS.toMillis(nanoseconds());
}
private void maybeSleep(long ms) {
if (ms != 0)
sleep(ms);
}
@Override
public void sleep(long ms) {
timeMs.addAndGet(ms);
highResTimeNs.addAndGet(TimeUnit.MILLISECONDS.toNanos(ms));
}
}