javax.persistence.spi

Class PersistenceProviderResolverHolder.PersistenceProviderResolverPerClassLoader

java.lang.Object

javax.persistence.spi.PersistenceProviderResolverHolder.PersistenceProviderResolverPerClassLoader

All Implemented Interfaces:

PersistenceProviderResolver

Enclosing class:

PersistenceProviderResolverHolder

private static class PersistenceProviderResolverHolder.PersistenceProviderResolverPerClassLoader
extends java.lang.Object
implements PersistenceProviderResolver

Cache PersistenceProviderResolver per classloader and use the current classloader as a key. Use CachingPersistenceProviderResolver for each PersistenceProviderResolver instance.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
private static class	PersistenceProviderResolverHolder.PersistenceProviderResolverPerClassLoader.CachingPersistenceProviderResolver Resolve the list of Persistence providers for a given classloader and cache the results.

Field Summary

Fields

Modifier and Type	Field and Description
private short	barrier
private java.util.WeakHashMap<java.lang.ClassLoader,PersistenceProviderResolver>	resolvers

Constructor Summary

Constructors

Modifier	Constructor and Description
private	PersistenceProviderResolverPerClassLoader()

Method Summary

Modifier and Type	Method and Description
void	clearCachedProviders() Clear cache of providers.
private static java.lang.ClassLoader	getContextualClassLoader()
java.util.List<PersistenceProvider>	getPersistenceProviders() Returns a list of the PersistenceProvider implementations available in the runtime environment.

Methods inherited from class java.lang.Object

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

Field Detail

resolvers

private final java.util.WeakHashMap<java.lang.ClassLoader,PersistenceProviderResolver> resolvers

barrier

private volatile short barrier

Constructor Detail

PersistenceProviderResolverPerClassLoader

private PersistenceProviderResolverPerClassLoader()

Method Detail

getPersistenceProviders

public java.util.List<PersistenceProvider> getPersistenceProviders()

Returns a list of the PersistenceProvider implementations available in the runtime environment.

Specified by:

getPersistenceProviders in interface PersistenceProviderResolver

Returns:

list of the persistence providers available in the environment

clearCachedProviders

public void clearCachedProviders()

Clear cache of providers.

Specified by:

clearCachedProviders in interface PersistenceProviderResolver

getContextualClassLoader

private static java.lang.ClassLoader getContextualClassLoader()