com.cedarsoft.test.utils

Class MemoryLeakVerifier<T>

java.lang.Object

com.cedarsoft.test.utils.MemoryLeakVerifier<T>

public class MemoryLeakVerifier<T>
extends Object

A simple utility class that can verify that an object has been successfully garbage collected.

Constructor Summary

Constructors

Constructor and Description
MemoryLeakVerifier(T object)

Method Summary

Modifier and Type	Method and Description
void	assertGarbageCollected() Attempts to perform a full garbage collection so that all weak references will be removed.
Object	getObject()
WeakReference<T>	getReference()

Methods inherited from class java.lang.Object

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

Constructor Detail

MemoryLeakVerifier

public MemoryLeakVerifier(@Nonnull
                          T object)

Method Detail

getReference

@Nonnull
public WeakReference<T> getReference()

getObject

@Nullable
public Object getObject()

assertGarbageCollected

public void assertGarbageCollected()

Attempts to perform a full garbage collection so that all weak references will be removed. Usually only a single GC is required, but there have been situations where some unused memory is not cleared up on the first pass. This method performs a full garbage collection and then validates that the weak reference now has been cleared. If it hasn't then the thread will sleep for 50 milliseconds and then retry up to 10 more times. If after this the object still has not been collected then the assertion will fail.

Based upon the method described in: http://www.javaworld.com/javaworld/javatips/jw-javatip130.html