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// Copyright (C) 2013 The Android Open Source Project
//
// 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 com.google.gerrit.server.util.time;
import com.google.common.annotations.VisibleForTesting;
import com.google.gerrit.common.UsedAt;
import com.google.gerrit.common.UsedAt.Project;
import com.google.gerrit.server.util.git.DelegateSystemReader;
import java.sql.Timestamp;
import java.time.Instant;
import java.util.concurrent.TimeUnit;
import java.util.function.LongSupplier;
import org.eclipse.jgit.util.SystemReader;
/** Static utility methods for dealing with dates and times. */
public class TimeUtil {
private static final LongSupplier SYSTEM_CURRENT_MILLIS_SUPPLIER = System::currentTimeMillis;
private static volatile LongSupplier currentMillisSupplier = SYSTEM_CURRENT_MILLIS_SUPPLIER;
public static long nowMs() {
// We should rather use Instant.now(Clock).toEpochMilli() instead but this would require some
// changes in our testing code as we wouldn't have clock steps anymore.
return currentMillisSupplier.getAsLong();
}
public static long nowNanos() {
return TimeUnit.NANOSECONDS.convert(TimeUtil.nowMs(), TimeUnit.MILLISECONDS);
}
public static Instant now() {
return Instant.ofEpochMilli(nowMs());
}
public static Timestamp nowTs() {
return new Timestamp(nowMs());
}
/**
* Returns the magic timestamp representing no specific time.
*
* <p>This "null object" is helpful in contexts where using {@code null} directly is not possible.
*/
@UsedAt(Project.PLUGIN_CHECKS)
public static Timestamp never() {
// Always create a new object as timestamps are mutable.
return new Timestamp(0);
}
public static Timestamp truncateToSecond(Timestamp t) {
return new Timestamp((t.getTime() / 1000) * 1000);
}
@VisibleForTesting
public static void setCurrentMillisSupplier(LongSupplier customCurrentMillisSupplier) {
currentMillisSupplier = customCurrentMillisSupplier;
SystemReader oldSystemReader = SystemReader.getInstance();
if (!(oldSystemReader instanceof GerritSystemReader)) {
SystemReader.setInstance(new GerritSystemReader(oldSystemReader));
}
}
@VisibleForTesting
public static void resetCurrentMillisSupplier() {
currentMillisSupplier = SYSTEM_CURRENT_MILLIS_SUPPLIER;
SystemReader.setInstance(null);
}
static class GerritSystemReader extends DelegateSystemReader {
GerritSystemReader(SystemReader reader) {
super(reader);
}
@Override
public long getCurrentTime() {
return currentMillisSupplier.getAsLong();
}
}
private TimeUtil() {}
}
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