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Use hashed UUID to spread last seen updates over a full day (#40)

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Ehren Kret
2020-05-26 13:38:52 -07:00
committed by GitHub
parent 1e7b6f78ca
commit eede4e50ca
3 changed files with 132 additions and 6 deletions
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14
service/src/main/java/org/whispersystems/textsecuregcm/util/Util.java
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@@ -23,6 +23,9 @@ import java.net.URLEncoder;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.SecureRandom;
import java.time.Clock;
import java.time.Duration;
import java.time.temporal.ChronoField;
import java.util.Arrays;
import java.util.Map;
import java.util.concurrent.TimeUnit;
@@ -186,6 +189,15 @@ public class Util {
}
public static long todayInMillis() {
return TimeUnit.DAYS.toMillis(TimeUnit.MILLISECONDS.toDays(System.currentTimeMillis()));
return todayInMillis(Clock.systemUTC());
}
public static long todayInMillis(Clock clock) {
return TimeUnit.DAYS.toMillis(TimeUnit.MILLISECONDS.toDays(clock.instant().toEpochMilli()));
}
public static long todayInMillisGivenOffsetFromNow(Clock clock, Duration offset) {
final long currentTimeSeconds = offset.addTo(clock.instant()).getLong(ChronoField.INSTANT_SECONDS);
return TimeUnit.DAYS.toMillis(TimeUnit.SECONDS.toDays(currentTimeSeconds));
}
}