Class LazyCleaner

java.lang.Object

org.postgresql.util.LazyCleaner

public class LazyCleaner
extends Object

LazyCleaner is a utility class that allows to register objects for deferred cleanup.

Note: this is a driver-internal class

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	LazyCleaner.Cleanable<T extends Throwable>
static interface	LazyCleaner.CleaningAction<T extends Throwable>
private class	LazyCleaner.Node<T extends Throwable>

Field Summary

Fields

Modifier and Type	Field	Description
private LazyCleaner.Node<?>	first
private static final LazyCleaner	instance
private static final Logger	LOGGER
private final ReferenceQueue<Object>	queue
private final ThreadFactory	threadFactory
private boolean	threadRunning
private final long	threadTtl
private int	watchedCount

Constructor Summary

Constructors

Modifier	Constructor	Description
	LazyCleaner(Duration threadTtl, String threadName)
private	LazyCleaner(Duration threadTtl, ThreadFactory threadFactory)

Method Summary

Modifier and Type	Method	Description
private <T extends Throwable> LazyCleaner.Node<T>	add(LazyCleaner.Node<T> node)
private boolean	checkEmpty()
static LazyCleaner	getInstance()	Returns a default cleaner instance.
int	getWatchedCount()
boolean	isThreadRunning()
<T extends Throwable> LazyCleaner.Cleanable<T>	register(Object obj, LazyCleaner.CleaningAction<T> action)
private boolean	remove(LazyCleaner.Node<?> node)
private boolean	startThread()

Methods inherited from class Object

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

Field Details

LOGGER

private static final Logger LOGGER

instance

private static final LazyCleaner instance

queue

private final ReferenceQueue<Object> queue

threadTtl

private final long threadTtl

threadFactory

private final ThreadFactory threadFactory

threadRunning

private boolean threadRunning

watchedCount

private int watchedCount

first

private LazyCleaner.Node<?> first

Constructor Details

LazyCleaner

public LazyCleaner(Duration threadTtl,
 String threadName)

LazyCleaner

private LazyCleaner(Duration threadTtl,
 ThreadFactory threadFactory)

Method Details

getInstance

public static LazyCleaner getInstance()

Returns a default cleaner instance.

Note: this is driver-internal API.

Returns:

the instance of LazyCleaner

register

public <T extends Throwable>
LazyCleaner.Cleanable<T> register(Object obj,
 LazyCleaner.CleaningAction<T> action)

getWatchedCount

public int getWatchedCount()

isThreadRunning

public boolean isThreadRunning()

checkEmpty

private boolean checkEmpty()

add

private <T extends Throwable> LazyCleaner.Node<T> add(LazyCleaner.Node<T> node)

startThread

private boolean startThread()

remove

private boolean remove(LazyCleaner.Node<?> node)