Package org.apache.sis.referencing.factory

Class ConcurrentAuthorityFactory.ShutdownHook<DAO extends GeodeticAuthorityFactory>

java.lang.Object

java.lang.ref.Reference<T>

java.lang.ref.PhantomReference<ConcurrentAuthorityFactory<DAO>>

org.apache.sis.referencing.factory.ConcurrentAuthorityFactory.ShutdownHook<DAO>

All Implemented Interfaces:

Callable<Object>, Disposable

Enclosing class:

ConcurrentAuthorityFactory<DAO extends GeodeticAuthorityFactory>

private static final class ConcurrentAuthorityFactory.ShutdownHook<DAO extends GeodeticAuthorityFactory>
extends PhantomReference<ConcurrentAuthorityFactory<DAO>>
implements Disposable, Callable<Object>

A hook to be executed either when the ConcurrentAuthorityFactory is collected by the garbage collector, when the Java Virtual Machine is shutdown, or when the module is uninstalled by the OSGi or Servlet container.

Do not keep reference to the enclosing factory - in particular, this class must not be static - otherwise the factory would never been garbage collected.

Field Summary

Fields

Modifier and Type	Field	Description
private final Deque<ConcurrentAuthorityFactory.DataAccessRef<DAO>>	availableDAOs	The ConcurrentAuthorityFactory.availableDAOs queue.

Constructor Summary

Constructors

Constructor	Description
ShutdownHook(ConcurrentAuthorityFactory<DAO> factory)	Creates a new shutdown hook for the given factory.

Method Summary

Modifier and Type	Method	Description
Object	call()	Invoked at JVM shutdown time, or when the container (OSGi or Servlet) uninstall the bundle containing SIS.
void	dispose()	Invoked indirectly by the garbage collector when the ConcurrentAuthorityFactory is disposed.

Methods inherited from class java.lang.ref.PhantomReference

get

Methods inherited from class java.lang.ref.Reference

clear, enqueue, isEnqueued

Methods inherited from class java.lang.Object

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

Field Details

availableDAOs

private final Deque<ConcurrentAuthorityFactory.DataAccessRef<DAO extends GeodeticAuthorityFactory>> availableDAOs

The ConcurrentAuthorityFactory.availableDAOs queue.

Constructor Details

ShutdownHook

ShutdownHook(ConcurrentAuthorityFactory<DAO> factory)

Creates a new shutdown hook for the given factory.

Method Details

dispose

public void dispose()

Invoked indirectly by the garbage collector when the ConcurrentAuthorityFactory is disposed.

Specified by:

dispose in interface Disposable

call

public Object call()
            throws Exception

Invoked at JVM shutdown time, or when the container (OSGi or Servlet) uninstall the bundle containing SIS.

Specified by:

call in interface Callable<DAO extends GeodeticAuthorityFactory>

Throws:

Exception