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// --- BEGIN COPYRIGHT BLOCK ---
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; version 2 of the License.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
//
// (C) 2007 Red Hat, Inc.
// All rights reserved.
// --- END COPYRIGHT BLOCK ---
package com.netscape.certsrv.util;
import java.util.Enumeration;
import java.util.Vector;
/**
* A statistics transaction.
* <P>
*
* @author thomask
* @version $Revision$, $Date$
*/
public class StatsEvent
{
private String mName = null;
private long mMin = -1;
private long mMax = -1;
private long mTimeTaken = 0;
private long mTimeTakenSqSum = 0;
private long mNoOfOperations = 0;
private Vector mSubEvents = new Vector();
private StatsEvent mParent = null;
public StatsEvent(StatsEvent parent)
{
mParent = parent;
}
public void setName(String name)
{
mName = name;
}
/**
* Retrieves Transaction name.
*/
public String getName()
{
return mName;
}
public void addSubEvent(StatsEvent st)
{
mSubEvents.addElement(st);
}
/**
* Retrieves a list of sub transaction names.
*/
public Enumeration getSubEventNames()
{
Vector names = new Vector();
Enumeration e = mSubEvents.elements();
while (e.hasMoreElements()) {
StatsEvent st = (StatsEvent)e.nextElement();
names.addElement(st.getName());
}
return names.elements();
}
/**
* Retrieves a sub transaction.
*/
public StatsEvent getSubEvent(String name)
{
Enumeration e = mSubEvents.elements();
while (e.hasMoreElements()) {
StatsEvent st = (StatsEvent)e.nextElement();
if (st.getName().equals(name)) {
return st;
}
}
return null;
}
public void resetCounters()
{
mMin = -1;
mMax = -1;
mNoOfOperations = 0;
mTimeTaken = 0;
mTimeTakenSqSum = 0;
Enumeration e = getSubEventNames();
while (e.hasMoreElements()) {
String n = (String)e.nextElement();
StatsEvent c = getSubEvent(n);
c.resetCounters();
}
}
public long getMax()
{
return mMax;
}
public long getMin()
{
return mMin;
}
public void incNoOfOperations(long c)
{
mNoOfOperations += c;
}
public long getTimeTakenSqSum()
{
return mTimeTakenSqSum;
}
public long getPercentage()
{
if (mParent == null || mParent.getTimeTaken() == 0) {
return 100;
} else {
return (mTimeTaken * 100 / mParent.getTimeTaken());
}
}
public long getStdDev()
{
if (getNoOfOperations() == 0) {
return 0;
} else {
long a = getTimeTakenSqSum();
long b = (-2 * getAvg() *getTimeTaken());
long c = getAvg() * getAvg() * getNoOfOperations();
return (long)Math.sqrt((a + b + c)/getNoOfOperations());
}
}
public long getAvg()
{
if (mNoOfOperations == 0) {
return -1;
} else {
return mTimeTaken/mNoOfOperations;
}
}
/**
* Retrieves number of operations performed.
*/
public long getNoOfOperations()
{
return mNoOfOperations;
}
public void incTimeTaken(long c)
{
if (mMin == -1) {
mMin = c;
} else {
if (c < mMin) {
mMin = c;
}
}
if (mMax == -1) {
mMax = c;
} else {
if (c > mMax) {
mMax = c;
}
}
mTimeTaken += c;
mTimeTakenSqSum += (c * c);
}
/**
* Retrieves total time token in msec.
*/
public long getTimeTaken()
{
return mTimeTaken;
}
}
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