Transactions in the CDM Library¶

Information on transactions in the cdm. How transactions are configured and why they are configured in a specific way. Furthermore in future this page can contain also information on transaction boundaries and the like.

The default propagation strategy for service classes is Propagation.SUPPORTS¶

With r8688 Propagation.SUPPORTS as been set as default propagation strategy for all service classes:

@Transactional(readOnly = true, propagation = Propagation.SUPPORTS) 
class ...

This has been only introduced to prevent early commit in Spring Web-flow.

In Forums and blocks the recommendation to set the propagation strategy to Propagation.SUPPORTS, this should increase the performance:

• http://stackoverflow.com/questions/10750445/how-to-apply-transactions-best-practice-for-read-operations-in-spring-mvc-using

• http://forum.springsource.org/showthread.php?61190-Propagation-Support-readOnly-true-vs-no-transactin-at-all

We tested the effect of setting propagation strategy to Propagation.SUPPORTS and could not find a significant difference.

see Propagation.SUPPORTS-vs-Propagation.REQUIRED.ods