io.opencensus.common.Clock 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.common;
/**
* Interface for getting the current time.
*
* @since 0.5
*/
public abstract class Clock {
/**
* Obtains the current instant from this clock.
*
* @return the current instant.
* @since 0.5
*/
public abstract Timestamp now();
/**
* Returns a time measurement with nanosecond precision that can only be used to calculate elapsed
* time.
*
* @return a time measurement with nanosecond precision that can only be used to calculate elapsed
* time.
* @since 0.5
*/
public abstract long nowNanos();
}