org.h2.util

类 CloseWatcher

java.lang.Object

java.lang.ref.Reference<T>

java.lang.ref.PhantomReference<Object>

org.h2.util.CloseWatcher

public class CloseWatcher
extends PhantomReference<Object>

A phantom reference to watch for unclosed objects.

构造器概要

构造器

构造器和说明
CloseWatcher(Object referent, ReferenceQueue<Object> q, AutoCloseable closeable)

方法概要

限定符和类型	方法和说明
AutoCloseable	getCloseable()
String	getOpenStackTrace() Get the open stack trace or null if none.
static CloseWatcher	pollUnclosed() Check for an collected object.
static CloseWatcher	register(Object o, AutoCloseable closeable, boolean stackTrace) Register an object.
static void	unregister(CloseWatcher w) Unregister an object, so it is no longer tracked.

从类继承的方法 java.lang.ref.PhantomReference

get

从类继承的方法 java.lang.ref.Reference

clear, enqueue, isEnqueued

从类继承的方法 java.lang.Object

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

构造器详细资料

CloseWatcher

public CloseWatcher(Object referent,
                    ReferenceQueue<Object> q,
                    AutoCloseable closeable)

方法详细资料

pollUnclosed

public static CloseWatcher pollUnclosed()

Check for an collected object.

返回:

the first watcher

register

public static CloseWatcher register(Object o,
                                    AutoCloseable closeable,
                                    boolean stackTrace)

Register an object. Before calling this method, pollUnclosed() should be called in a loop to remove old references.

参数:

o - the object

closeable - the object to close

stackTrace - whether the stack trace should be registered (this is relatively slow)

返回:

the close watcher

unregister

public static void unregister(CloseWatcher w)

Unregister an object, so it is no longer tracked.

参数:

w - the reference

getOpenStackTrace

public String getOpenStackTrace()

Get the open stack trace or null if none.

返回:

the open stack trace

getCloseable

public AutoCloseable getCloseable()