Performs a pessimistic lock upgrade on a given entity, if needed.
if ( requestedLockMode.greaterThan( entry.getLockMode() ) ) {
// The user requested a "greater" (i.e. more restrictive) form of
// pessimistic lock
if ( entry.getStatus() != Status.MANAGED ) {
throw new ObjectDeletedException(
"attempted to lock a deleted instance",
entry.getId(),
entry.getPersister().getEntityName()
);
}
final EntityPersister persister = entry.getPersister();
if ( log.isTraceEnabled() )
log.trace(
"locking " +
MessageHelper.infoString( persister, entry.getId(), source.getFactory() ) +
" in mode: " +
requestedLockMode
);
final CacheConcurrencyStrategy.SoftLock lock;
final CacheKey ck;
if ( persister.hasCache() ) {
ck = new CacheKey(
entry.getId(),
persister.getIdentifierType(),
persister.getRootEntityName(),
source.getEntityMode(),
source.getFactory()
);
lock = persister.getCache().lock( ck, entry.getVersion() );
}
else {
ck = null;
lock = null;
}
try {
if ( persister.isVersioned() && requestedLockMode == LockMode.FORCE ) {
// todo : should we check the current isolation mode explicitly?
Object nextVersion = persister.forceVersionIncrement(
entry.getId(), entry.getVersion(), source
);
entry.forceLocked( object, nextVersion );
}
else {
persister.lock( entry.getId(), entry.getVersion(), object, requestedLockMode, source );
}
entry.setLockMode(requestedLockMode);
}
finally {
// the database now holds a lock + the object is flushed from the cache,
// so release the soft lock
if ( persister.hasCache() ) {
persister.getCache().release(ck, lock );
}
}
}
