Hi all,

I have this question regarding rolling back and I thought it is handled by Transaction Manager of the EJB 3.0 but it doesnot seem so.
The problem is I have method in a Stateless session bean that trying to remove some rows in 1 table first and and then insert some rows in the other table. I want to make sure if the insertion failed in the second step, all of those removals would be rolled back. I use the EntityManager to do the delete and insert. Here are the pseudocode of my method

void updateDB (){

 removeRows();
 addRows();
}
void removeRows(){
 //use EntityManager to remove
}

void addRows(){
 //use EntityManager to insert some rows
}

Could anyone tell me how to make sure if the call to addRows failed, such as insert a duplicate row, would cause the removeRows rolledback?

Thank you very much in advance,

LNgo