de.fuberlin.wiwiss.d2rq.sql

Class BeanCounter

java.lang.Object

de.fuberlin.wiwiss.d2rq.sql.BeanCounter

All Implemented Interfaces:

Cloneable

public class BeanCounter
extends Object
implements Cloneable

A class for capturing performance information. We grant read/write access to instance variables. TODO: Remove?

Author:

jgarbers

Field Summary

Fields

Modifier and Type	Field and Description
int	numberOfExecutedSQLQueries
int	numberOfReturnedFields
int	numberOfReturnedRows
long	timeMillis
static int	totalNumberOfExecutedSQLQueries
static int	totalNumberOfReturnedFields
static int	totalNumberOfReturnedRows

Constructor Summary

Constructors

Constructor and Description
BeanCounter()

Method Summary

Methods

Modifier and Type	Method and Description
Object	clone()
void	div(int n) This = This / n .
static BeanCounter	instance() Get a copy of the static fields.
static BeanCounter	instanceMinus(BeanCounter minus) Get a difference instance.
BeanCounter	minus(BeanCounter minus) Get a difference instance.
String	sqlInfoString() Convenience method for presenting information.
String	sqlPerformanceString() Convenience method for presenting information.
void	subtract(BeanCounter minus) This = This - minus .
void	update() Updates the instance fields with current static values.

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

totalNumberOfExecutedSQLQueries

public static int totalNumberOfExecutedSQLQueries

totalNumberOfReturnedRows

public static int totalNumberOfReturnedRows

totalNumberOfReturnedFields

public static int totalNumberOfReturnedFields

numberOfExecutedSQLQueries

public int numberOfExecutedSQLQueries

numberOfReturnedRows

public int numberOfReturnedRows

numberOfReturnedFields

public int numberOfReturnedFields

timeMillis

public long timeMillis

Constructor Detail

BeanCounter

public BeanCounter()

Method Detail

update

public void update()

Updates the instance fields with current static values.

subtract

public void subtract(BeanCounter minus)

This = This - minus . The difference between this and a start value.

div

public void div(int n)

This = This / n . Good for averaging over n runs.

clone

public Object clone()

Overrides:

clone in class Object

instance

public static BeanCounter instance()

Get a copy of the static fields.

Returns:

an instance

instanceMinus

public static BeanCounter instanceMinus(BeanCounter minus)

Get a difference instance.

Returns:

a new (static - minus) instance

minus

public BeanCounter minus(BeanCounter minus)

Get a difference instance.

Returns:

a new (this - minus) instance

sqlInfoString

public String sqlInfoString()

Convenience method for presenting information.

sqlPerformanceString

public String sqlPerformanceString()

Convenience method for presenting information.