/**
* Loads/caches the persistence provider adapter
*
* @param adapterModule may specify the adapter module name (can be null to use noop provider)
* @return the persistence provider adaptor for the provider class
* @throws ModuleLoadException
*/
public static PersistenceProviderAdaptor loadPersistenceAdapterModule(String adapterModule)
throws ModuleLoadException {
final ModuleLoader moduleLoader = Module.getBootModuleLoader();
if (adapterModule == null) {
return noopAdaptor;
}
PersistenceProviderAdaptor persistenceProviderAdaptor = null;
Module module = moduleLoader.loadModule(ModuleIdentifier.fromString(adapterModule));
final ServiceLoader<PersistenceProviderAdaptor> serviceLoader =
module.loadService(PersistenceProviderAdaptor.class);
if (serviceLoader != null) {
for (PersistenceProviderAdaptor adaptor : serviceLoader) {
if (persistenceProviderAdaptor != null) {
throw MESSAGES.multipleAdapters(adapterModule);
}
persistenceProviderAdaptor = adaptor;
JPA_LOGGER.debugf("loaded persistence provider adapter %s", adapterModule);
}
if (persistenceProviderAdaptor != null) {
persistenceProviderAdaptor.injectJtaManager(JtaManagerImpl.getInstance());
}
}
return persistenceProviderAdaptor;
}
/**
* Loads the persistence provider adapter
*
* @param persistenceProvider classloader will be used to load the persistence provider adapter
* @return the persistence provider adaptor for the provider class
*/
public static PersistenceProviderAdaptor loadPersistenceAdapter(
PersistenceProvider persistenceProvider) {
PersistenceProviderAdaptor persistenceProviderAdaptor = null;
final ServiceLoader<PersistenceProviderAdaptor> serviceLoader =
ServiceLoader.load(
PersistenceProviderAdaptor.class, persistenceProvider.getClass().getClassLoader());
if (serviceLoader != null) {
for (PersistenceProviderAdaptor adaptor : serviceLoader) {
if (persistenceProviderAdaptor != null) {
throw MESSAGES.classloaderHasMultipleAdapters(
persistenceProvider.getClass().getClassLoader().toString());
}
persistenceProviderAdaptor = adaptor;
JPA_LOGGER.debugf(
"loaded persistence provider adapter %s from classloader %s",
persistenceProviderAdaptor.getClass().getName(),
persistenceProvider.getClass().getClassLoader().toString());
}
if (persistenceProviderAdaptor != null) {
persistenceProviderAdaptor.injectJtaManager(JtaManagerImpl.getInstance());
}
}
return persistenceProviderAdaptor == null ? noopAdaptor : persistenceProviderAdaptor;
}