Java EE JTA and transaction rollback

Question

I have a business service method that calls a Repository and i want to know how i can rollback a transaction.Say for example

@Transactionl
public class OrderService {

@inject
OrderRepository orderRepository;

@inject
InventoryRepository inventoryRepository;

@inject
Order order;

@inject
Item item;

public Order createOrder (Order order) {
    orderRepository.save(order);
}
public Item reduceInventory(Item item) {
     inventoryRepository.update(item);

}

What i want is when a checked exception like a SQL Exception occurs then I want both createOrder and reduceInventory should both be rolledback.Say after creating the order when i go reduceInventory if the item count is negative i dont ant the order to be created at all.

Thanks in advance

Steve C Steve C · Accepted Answer · 2016-08-22T01:35:03

I'm assuming that you are using your OrderService from a web tier that has no associated transaction management.

That being the case then you should consider modifying your service code so that a single method executes the code that you need to be atomic:

@Transactional(rollbackOn = { SQLException.class, PersistenceException.class } )
public Order createOrder (Order order) {
    orderRepository.save(order);
    // I'm just guessing your update logic here:
    for (Item item: order.getItems()) {
        inventoryRepository.update(item)
    }
}

If any of the rollbackOn exceptions are thrown then the entire transaction will be rolled back.

Java EE JTA and transaction rollback

2 Answers