com.sun.enterprise.universal.NanoDuration Maven / Gradle / Ivy
/*
* Copyright (c) 2010, 2018 Oracle and/or its affiliates. All rights reserved.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License v. 2.0, which is available at
* http://www.eclipse.org/legal/epl-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception, which is available at
* https://www.gnu.org/software/classpath/license.html.
*
* SPDX-License-Identifier: EPL-2.0 OR GPL-2.0 WITH Classpath-exception-2.0
*/
package com.sun.enterprise.universal;
import com.sun.enterprise.universal.i18n.LocalStringsImpl;
/**
* Convert a nanosec duration into something readable
* @author bnevins
* Thread Safe.
* Immutable
*/
public final class NanoDuration {
public NanoDuration(long nsec) {
// if > 1 minute -- use Duration
if(nsec >= NSEC_PER_MINUTE) {
duration = new Duration(nsec / ((long)NSEC_PER_MILLISECOND));
return;
}
double ns = nsec;
if(ns >= NSEC_PER_SECOND)
numSeconds = ns / NSEC_PER_SECOND;
else if(ns >= NSEC_PER_MILLISECOND)
numMilliSeconds = ns / NSEC_PER_MILLISECOND;
else if(ns >= NSEC_PER_MICROSECOND)
numMicroSeconds = ns / NSEC_PER_MICROSECOND;
else
numNanoSeconds = nsec; // not a double!
}
@Override
public String toString() {
if(duration != null)
return duration.toString();
final String fmt = "%.2f %s";
String s;
if(numSeconds > 0.0)
s = String.format(fmt, numSeconds, "seconds");
else if(numMilliSeconds > 0.0)
s = String.format(fmt, numMilliSeconds, "msec");
else if(numMicroSeconds > 0.0)
s = String.format(fmt, numMicroSeconds, "usec");
else if(numNanoSeconds > 0.0)
s = String.format(fmt, numNanoSeconds, "nsec");
else
s = String.format(fmt, 0.0, "nsec"); // unlikely!
return s;
}
// possibly useful constants
public final static double NSEC_PER_MICROSECOND = 1000;
public final static double NSEC_PER_MILLISECOND = 1000 * 1000;
public final static double NSEC_PER_SECOND = 1000 * 1000 * 1000;
public final static double NSEC_PER_MINUTE = 60 * 1000 * 1000 * 1000;
private double numSeconds = -1.0;
private double numMilliSeconds = -1.0;
private double numMicroSeconds = -1.0;
private double numNanoSeconds = -1.0;
private Duration duration;
}