io.opencensus.internal.ZeroTimeClock Maven / Gradle / Ivy
/*
* Copyright 2017, OpenCensus Authors
*
* 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 io.opencensus.internal;
import io.opencensus.common.Clock;
import io.opencensus.common.Timestamp;
import javax.annotation.concurrent.Immutable;
/** A {@link Clock} that always returns 0. */
@Immutable
public final class ZeroTimeClock extends Clock {
private static final ZeroTimeClock INSTANCE = new ZeroTimeClock();
private static final Timestamp ZERO_TIMESTAMP = Timestamp.create(0, 0);
private ZeroTimeClock() {}
/**
* Returns a {@code ZeroTimeClock}.
*
* @return a {@code ZeroTimeClock}.
*/
public static ZeroTimeClock getInstance() {
return INSTANCE;
}
@Override
public Timestamp now() {
return ZERO_TIMESTAMP;
}
@Override
public long nowNanos() {
return 0;
}
}