JTA Transaction Integration
Embedded Process Engine
The process engine transaction management can integrate with JTA. To use JTA transaction manager integration, you need to use the
org.camunda.bpm.engine.impl.cfg.JtaProcessEngineConfigurationfor JTA integration onlyorg.camunda.bpm.engine.cdi.CdiJtaProcessEngineConfigurationfor additional CDI expression resolving support.
The process engine requires access to an implementation of javax.transaction.TransactionManager. Not all application servers provide such an implementation. Most notably, IBM WebSphere and Oracle WebLogic historically did not provide this implementation. To achieve JTA transaction integration on these containers, users should use the Spring Framework Abstraction and configure the process engine using the SpringProcessEngineConfiguration.
When you configure a transaction manager, make sure that it actually manages the data source that you have configured for the process engine. If that is not the case, the data source works in auto-commit mode. This can lead to inconsistencies in the database, because transaction commits and rollbacks are no longer performed.
Shared Process Engine
The shared process engine distributions for Java EE Application Servers (Wildfly, JBoss, IBM WebSphere Application Server, Oracle WebLogic Application Server) provide JTA integration out of the box.