//$Id: CollectionAction.java 9673 2006-03-22 14:57:59Z [email protected] $
package org.hibernate.action;
import org.hibernate.cache.CacheConcurrencyStrategy.SoftLock;
import org.hibernate.cache.CacheException;
import org.hibernate.cache.CacheKey;
import org.hibernate.collection.PersistentCollection;
import org.hibernate.engine.SessionImplementor;
import org.hibernate.persister.collection.CollectionPersister;
import org.hibernate.pretty.MessageHelper;
import org.hibernate.util.StringHelper;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
/**
* Any action relating to insert/update/delete of a collection
* @author Gavin King
*/
public abstract class CollectionAction implements Executable, Serializable, Comparable {
private transient CollectionPersister persister;
private final Serializable key;
private Serializable finalKey;
private final SessionImplementor session;
private SoftLock lock;
private final String collectionRole;
private final PersistentCollection collection;
public CollectionAction(
final CollectionPersister persister,
final PersistentCollection collection,
final Serializable key,
final SessionImplementor session)
throws CacheException {
this.persister = persister;
this.session = session;
this.key = key;
this.collectionRole = persister.getRole();
this.collection = collection;
}
protected PersistentCollection getCollection() {
return collection;
}
private void readObject(ObjectInputStream ois) throws IOException, ClassNotFoundException {
ois.defaultReadObject();
persister = session.getFactory().getCollectionPersister( collectionRole );
}
public void afterTransactionCompletion(boolean success) throws CacheException {
if ( persister.hasCache() ) {
final CacheKey ck = new CacheKey(
key,
persister.getKeyType(),
persister.getRole(),
session.getEntityMode(),
session.getFactory()
);
persister.getCache().release(ck, lock);
}
}
public boolean hasAfterTransactionCompletion() {
return persister.hasCache();
}
public Serializable[] getPropertySpaces() {
return persister.getCollectionSpaces();
}
protected final CollectionPersister getPersister() {
return persister;
}
protected final Serializable getKey() {
finalKey = key;
if ( key instanceof DelayedPostInsertIdentifier ) {
// need to look it up from the persistence-context
finalKey = session.getPersistenceContext().getEntry( collection.getOwner() ).getId();
if ( finalKey == key ) {
// we may be screwed here since the collection action is about to execute
// and we do not know the final owner key value
}
}
return finalKey;
}
protected final SessionImplementor getSession() {
return session;
}
public final void beforeExecutions() throws CacheException {
// we need to obtain the lock before any actions are
// executed, since this may be an inverse="true"
// bidirectional association and it is one of the
// earlier entity actions which actually updates
// the database (this action is resposible for
// second-level cache invalidation only)
if ( persister.hasCache() ) {
final CacheKey ck = new CacheKey(
key,
persister.getKeyType(),
persister.getRole(),
session.getEntityMode(),
session.getFactory()
);
lock = persister.getCache().lock(ck, null);
}
}
protected final void evict() throws CacheException {
if ( persister.hasCache() ) {
CacheKey ck = new CacheKey(
key,
persister.getKeyType(),
persister.getRole(),
session.getEntityMode(),
session.getFactory()
);
persister.getCache().evict(ck);
}
}
public String toString() {
return StringHelper.unqualify( getClass().getName() ) +
MessageHelper.infoString( collectionRole, key );
}
public int compareTo(Object other) {
CollectionAction action = ( CollectionAction ) other;
//sort first by role name
int roleComparison = collectionRole.compareTo( action.collectionRole );
if ( roleComparison != 0 ) {
return roleComparison;
}
else {
//then by fk
return persister.getKeyType()
.compare( key, action.key, session.getEntityMode() );
}
}
}
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