com.google.api.core.CurrentMillisClock Maven / Gradle / Ivy
/*
* Copyright 2017, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
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* in the documentation and/or other materials provided with the
* distribution.
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* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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package com.google.api.core;
import java.io.ObjectStreamException;
import java.io.Serializable;
import java.util.concurrent.TimeUnit;
/**
* Implementation of the {@link ApiClock} interface, which uses {@link System#currentTimeMillis()}
* as time source.
*/
public final class CurrentMillisClock implements ApiClock, Serializable {
private static final long serialVersionUID = -6019259882852183285L;
private static final ApiClock DEFAULT_CLOCK = new CurrentMillisClock();
public static ApiClock getDefaultClock() {
return DEFAULT_CLOCK;
}
private CurrentMillisClock() {}
@Override
public long nanoTime() {
return TimeUnit.NANOSECONDS.convert(millisTime(), TimeUnit.MILLISECONDS);
}
@Override
public long millisTime() {
return System.currentTimeMillis();
}
private Object readResolve() throws ObjectStreamException {
return DEFAULT_CLOCK;
}
}