DefaultInitializeCollectionEventListenerpublic class DefaultInitializeCollectionEventListener extends Object implements org.hibernate.event.InitializeCollectionEventListener
Fields Summary |
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private static final Log | log |
Methods Summary |
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private boolean | initializeCollectionFromCache(java.io.Serializable id, org.hibernate.persister.collection.CollectionPersister persister, org.hibernate.collection.PersistentCollection collection, org.hibernate.engine.SessionImplementor source)Try to initialize a collection from the cache
if ( !source.getEnabledFilters().isEmpty() && persister.isAffectedByEnabledFilters( source ) ) {
log.trace( "disregarding cached version (if any) of collection due to enabled filters ");
return false;
}
final boolean useCache = persister.hasCache() &&
source.getCacheMode().isGetEnabled();
if ( !useCache ) {
return false;
}
else {
final SessionFactoryImplementor factory = source.getFactory();
final CacheKey ck = new CacheKey(
id,
persister.getKeyType(),
persister.getRole(),
source.getEntityMode(),
source.getFactory()
);
Object ce = persister.getCache().get( ck, source.getTimestamp() );
if ( factory.getStatistics().isStatisticsEnabled() ) {
if (ce==null) {
factory.getStatisticsImplementor().secondLevelCacheMiss(
persister.getCache().getRegionName()
);
}
else {
factory.getStatisticsImplementor().secondLevelCacheHit(
persister.getCache().getRegionName()
);
}
}
if (ce==null) {
return false;
}
else {
CollectionCacheEntry cacheEntry = (CollectionCacheEntry) persister.getCacheEntryStructure()
.destructure(ce, factory);
final PersistenceContext persistenceContext = source.getPersistenceContext();
cacheEntry.assemble(
collection,
persister,
persistenceContext.getCollectionOwner(id, persister)
);
persistenceContext.getCollectionEntry(collection).postInitialize(collection);
//addInitializedCollection(collection, persister, id);
return true;
}
}
| public void | onInitializeCollection(org.hibernate.event.InitializeCollectionEvent event)called by a collection that wants to initialize itself
PersistentCollection collection = event.getCollection();
SessionImplementor source = event.getSession();
CollectionEntry ce = source.getPersistenceContext().getCollectionEntry(collection);
if (ce==null) throw new HibernateException("collection was evicted");
if ( !collection.wasInitialized() ) {
if ( log.isTraceEnabled() ) {
log.trace(
"initializing collection " +
MessageHelper.collectionInfoString( ce.getLoadedPersister(), ce.getLoadedKey(), source.getFactory() )
);
}
log.trace("checking second-level cache");
final boolean foundInCache = initializeCollectionFromCache(
ce.getLoadedKey(),
ce.getLoadedPersister(),
collection,
source
);
if (foundInCache) {
log.trace("collection initialized from cache");
}
else {
log.trace("collection not cached");
ce.getLoadedPersister().initialize( ce.getLoadedKey(), source );
log.trace("collection initialized");
if ( source.getFactory().getStatistics().isStatisticsEnabled() ) {
source.getFactory().getStatisticsImplementor().fetchCollection(
ce.getLoadedPersister().getRole()
);
}
}
}
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