* @param event The replicate event to be handled.
*
* @throws TransientObjectException An invalid attempt to replicate a transient entity.
*/
public void onReplicate(ReplicateEvent event) {
final EventSource source = event.getSession();
if ( source.getPersistenceContext().reassociateIfUninitializedProxy( event.getObject() ) ) {
LOG.trace( "Uninitialized proxy passed to replicate()" );
return;
}
Object entity = source.getPersistenceContext().unproxyAndReassociate( event.getObject() );
if ( source.getPersistenceContext().isEntryFor( entity ) ) {
LOG.trace( "Ignoring persistent instance passed to replicate()" );
//hum ... should we cascade anyway? throw an exception? fine like it is?
return;
}
EntityPersister persister = source.getEntityPersister( event.getEntityName(), entity );
// get the id from the object
/*if ( persister.isUnsaved(entity, source) ) {
throw new TransientObjectException("transient instance passed to replicate()");
}*/
Serializable id = persister.getIdentifier( entity, source );
if ( id == null ) {
throw new TransientObjectException( "instance with null id passed to replicate()" );
}
final ReplicationMode replicationMode = event.getReplicationMode();
final Object oldVersion;
if ( replicationMode == ReplicationMode.EXCEPTION ) {
//always do an INSERT, and let it fail by constraint violation
oldVersion = null;
}
else {
//what is the version on the database?
oldVersion = persister.getCurrentVersion( id, source );
}
final boolean traceEnabled = LOG.isTraceEnabled();
if ( oldVersion != null ) {
if ( traceEnabled ) {
LOG.tracev(
"Found existing row for {0}", MessageHelper.infoString(
persister,
id,
source.getFactory()
)
);
}
/// HHH-2378
final Object realOldVersion = persister.isVersioned() ? oldVersion : null;
boolean canReplicate = replicationMode.shouldOverwriteCurrentVersion(
entity,
realOldVersion,
persister.getVersion( entity ),
persister.getVersionType()
);
// if can replicate, will result in a SQL UPDATE
// else do nothing (don't even reassociate object!)
if ( canReplicate ) {
performReplication( entity, id, realOldVersion, persister, replicationMode, source );
}
else if ( traceEnabled ) {
LOG.trace( "No need to replicate" );
}
//TODO: would it be better to do a refresh from db?
}
else {
// no existing row - do an insert
if ( traceEnabled ) {
LOG.tracev(
"No existing row, replicating new instance {0}",
MessageHelper.infoString( persister, id, source.getFactory() )
);
}
final boolean regenerate = persister.isIdentifierAssignedByInsert(); // prefer re-generation of identity!
final EntityKey key = regenerate ? null : source.generateEntityKey( id, persister );
performSaveOrReplicate(
entity,
key,
persister,