google-nomulus/javatests/google/registry/testing/FakeClock.java
mcilwain 7d3cb3d426 Make our Clock util Serializable
It doesn't entirely make semantic sense, since the actual state of the
SystemClock isn't being preserved, but it makes injection into serializable
classes (e.g. mapreduces) much simpler, so it's worth doing.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=201755949
2018-06-27 15:28:52 -04:00

68 lines
2.2 KiB
Java

// Copyright 2017 The Nomulus Authors. All Rights Reserved.
//
// Licensed 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 google.registry.testing;
import static google.registry.util.DateTimeUtils.START_OF_TIME;
import static org.joda.time.DateTimeZone.UTC;
import static org.joda.time.Duration.millis;
import google.registry.util.Clock;
import java.util.concurrent.atomic.AtomicLong;
import javax.annotation.concurrent.ThreadSafe;
import org.joda.time.DateTime;
import org.joda.time.ReadableDuration;
import org.joda.time.ReadableInstant;
/** A mock clock for testing purposes that supports telling, setting, and advancing the time. */
@ThreadSafe
public final class FakeClock implements Clock {
private static final long serialVersionUID = 675054721685304599L;
// Clock isn't a thread synchronization primitive, but tests involving
// threads should see a consistent flow.
private final AtomicLong currentTimeMillis = new AtomicLong();
/** Creates a FakeClock that starts at START_OF_TIME. */
public FakeClock() {
this(START_OF_TIME);
}
/** Creates a FakeClock initialized to a specific time. */
public FakeClock(ReadableInstant startTime) {
setTo(startTime);
}
/** Returns the current time. */
@Override
public DateTime nowUtc() {
return new DateTime(currentTimeMillis.get(), UTC);
}
/** Advances clock by one millisecond. */
public void advanceOneMilli() {
advanceBy(millis(1));
}
/** Advances clock by some duration. */
public void advanceBy(ReadableDuration duration) {
currentTimeMillis.addAndGet(duration.getMillis());
}
/** Sets the time to the specified instant. */
public void setTo(ReadableInstant time) {
currentTimeMillis.set(time.getMillis());
}
}