org.slf4j.profiler.Util Maven / Gradle / Ivy
/**
* Copyright (c) 2004-2011 QOS.ch
* All rights reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
*/
package org.slf4j.profiler;
import java.text.DecimalFormat;
/**
*
* A collection of utility methods.
*
* @author Ceki Gülcü
*
*/
class Util {
static final long NANOS_IN_ONE_MICROSECOND = 1000;
static final long NANOS_IN_ONE_MILLISECOND = NANOS_IN_ONE_MICROSECOND * 1000;
static final long NANOS_IN_ONE_SECOND =NANOS_IN_ONE_MILLISECOND * 1000;
private static final DecimalFormat DECIMAL_FORMAT = new DecimalFormat("0.000");
static DurationUnit selectDurationUnitForDisplay(StopWatch sw) {
return selectDurationUnitForDisplay(sw.elapsedTime());
}
static DurationUnit selectDurationUnitForDisplay(long durationInNanos) {
if (durationInNanos < 10*NANOS_IN_ONE_MICROSECOND) {
return DurationUnit.NANOSECOND;
} else if (durationInNanos < 10*NANOS_IN_ONE_MILLISECOND) {
return DurationUnit.MICROSECOND;
} else if (durationInNanos < 10*NANOS_IN_ONE_SECOND) {
return DurationUnit.MILLISSECOND;
} else {
return DurationUnit.SECOND;
}
}
static public double convertToMicros(long nanos) {
return (double) nanos / NANOS_IN_ONE_MICROSECOND;
}
static public double convertToMillis(long nanos) {
return (double) nanos / NANOS_IN_ONE_MILLISECOND;
}
static public double convertToSeconds(long nanos) {
return ((double) nanos / NANOS_IN_ONE_SECOND);
}
static String durationInDurationUnitsAsStr(StringBuffer buf, StopWatch sw) {
DurationUnit du = selectDurationUnitForDisplay(sw);
return durationInDurationUnitsAsStr(sw.elapsedTime(), du);
}
static String durationInDurationUnitsAsStr(long nanos, DurationUnit durationUnit) {
StringBuffer buf = new StringBuffer();
switch (durationUnit) {
case NANOSECOND:
buf.append(nanos);
break;
case MICROSECOND:
double micros = convertToMicros(nanos);
buf.append(DECIMAL_FORMAT.format(micros));
break;
case MILLISSECOND:
double millis = convertToMillis(nanos);
buf.append(DECIMAL_FORMAT.format(millis));
break;
case SECOND:
double seconds = convertToSeconds(nanos);
buf.append(DECIMAL_FORMAT.format(seconds));
break;
}
return buf.toString();
}
static void appendDurationUnitAsStr(StringBuffer buf, DurationUnit durationUnit) {
switch (durationUnit) {
case NANOSECOND:
buf.append("nanoseconds.");
break;
case MICROSECOND:
buf.append("microseconds.");
break;
case MILLISSECOND:
buf.append("milliseconds.");
break;
case SECOND:
buf.append(" seconds.");
break;
}
}
}