// 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.util;

import static java.time.temporal.ChronoUnit.MILLIS;

import jakarta.inject.Inject;
import java.time.Instant;
import javax.annotation.concurrent.ThreadSafe;

/** Clock implementation that proxies to the real system clock. */
@ThreadSafe
public class SystemClock implements Clock {

  private static final long serialVersionUID = 5165372013848947515L;

  @Inject
  public SystemClock() {}

  @Override
  public Instant now() {
    // Truncate to milliseconds to match the precision of our database schema.
    // This prevents subtle comparison bugs where a high-precision Instant would be
    // considered "after" a truncated database timestamp.
    return Instant.now().truncatedTo(MILLIS);
  }
}
