BC4J commit/rollback transaction

Question

I'm using the following code (copied from the complete UIX BC4J application) to delete a row:
<event name="removeCaractGrupo">
<bc4j:findRootAppModule name="GruposMineriosAppModule">
<bc4j:findViewObject name="ClasseAtualCaractGrupoMinerioView">
<bc4j:findRowByKey>
<bc4j:keyBinding>
<bc4j:selectionKey name="caractGruposData" key="keyCaractGrupo" />
</bc4j:keyBinding>
<bc4j:handlers>
<bc4j:removeRow />
<bc4j:executeQuery/>
</bc4j:handlers>
</bc4j:findRowByKey>
</bc4j:findViewObject>
<bc4j:commit/>
</bc4j:findRootAppModule>
</event>
It works fine but if the row cannot be removed because of a constraint violation the row is still removed from the viewObjectScope and appears again only if I send a <bc4j:rollback/> command.
The question is: is there any approach like a try/catch within the uiXML event handler??
<ui:try>
<contents>
<bc4j:commit/>
</contents>
<ui:catch>
<bc4j:rollback/>
</ui:catch>
</ui:try>
Or do I have to call a Java class method to do this??

Answer 1

There's nothing like <try>/<catch> in the event handler section. It looks like you'd need to replace the commit handler here with handcoded Java that will rollback in case the commit fails.