[keycloak-user] Opening Transactions

[Marek Posolda]

Hello,

atm we don't support multiple transactions for the same session. If we 
would ever support it, we will need to traverse the "afterCompletion" 
list in DefaultKeycloakTransactionManager.begin (and also similarly in 
DefaultKeycloakTransactionManager.isRollbackOnly() ). Maybe you can 
create JIRA and we can take a look later? Another thing is that all 
enlisted transactions would also need to support multiple transactions 
per session (for example in case of JPA it is multiple transactions per 
single EntityManager, which JPA supports, but there might be some 
performance issues with it)

Note that until than, you can use pattern where each transaction will 
run in it's own KeycloakSession. So defacto multiple KeycloakSession per 
request. If you already have any KeycloakSession you can retrieve 
KeycloakSessionFactory with:
KeycloakSessionFactory factory = session.getKeycloakSessionFactory();

And then you can use for example: KeycloakModelUtils.runJobInTransaction 
to use separate KeycloakSession and transaction for your task. Does it 
work for your usecase?

Marek

On 19.9.2014 00:13, Rodrigo Sasaki wrote:
> Hello,
>
> I have created some custom endpoints for my project, and in one of 
> them I need to use multiple transactions on a single request. I ran 
> into some issues, even though I call
>
> session.getTransaction().begin()
>
> It didn't work correctly saying that I didn't have an opened 
> transaction. I look a little deeper and saw that there are 2 lists of 
> transactions inside 
> org.keycloak.services.DefaultKeycloakTransactionManager.
>
> One is called *transactions* and the other is *afterCompletion*
>
> when commit() is called, both lists are traversed committing every 
> single transaction in them, but when begin() is called, only the 
> *transactions* list is traversed, and the one I needed was inside 
> *afterCompletion*, which remained closed.
>
> Is this supposed to be this way? I'm not sure what these lists do, but 
> maybe the other one should be opened too.
>
> Is there a problem on opening the transactions on *afterCompletion* 
> list as well?
>
> Thanks!
>
> -- 
> Rodrigo Sasaki
>
>
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