org.glassfish.common.util

Class InstanceCounter

java.lang.Object

org.glassfish.common.util.InstanceCounter

public class InstanceCounter
extends Object

Counts instances of a particular class, helpful in leak detection

Example: Put the following line into the class you want counted:

private final InstanceCounter instanceCounter = new InstanceCounter<>(this);

Author:

Cuba Stanley

Constructor Summary

Constructors

Constructor and Description
InstanceCounter(Object counted) triggers instance counting of the specified

Method Summary

Modifier and Type	Method and Description
static int	getInstanceCount(Class<?> countedType, long timeout) Returns instance count of a particular class.
static Set<WeakReference<?>>	getInstances(Class<?> countedType, long timeout) gets actual references to counted objects

Methods inherited from class java.lang.Object

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

Constructor Detail

InstanceCounter

public InstanceCounter(Object counted)

triggers instance counting of the specified

Parameters:

counted - object to be counted

Method Detail

getInstanceCount

public static int getInstanceCount(Class<?> countedType,
                                   long timeout)

Returns instance count of a particular class.

Parameters:

countedType -

timeout - in milliseconds to wait to collect removed instances

Returns:

current instance count

getInstances

public static Set<WeakReference<?>> getInstances(Class<?> countedType,
                                                 long timeout)

gets actual references to counted objects

Parameters:

countedType -

timeout - in milliseconds

Returns:

list of counted objects