WebSphere eXtreme Scale Programming Guide > Access data in WebSphere eXtreme Scale > EntityManager API introduction
EntityTransaction interface
You can use the EntityTransaction interface to demarcate transactions.
Purpose
To demarcate a transaction, you can use the EntityTransaction interface, which is associated with an entity manager instance. Use the EntityManager.getTransaction method to retrieve the EntityTransaction instance for the entity manager. Each EntityManager and EntityTransaction instance are associated with the Session. You can demarcate transactions with either the EntityTransaction or Session. Methods on the EntityTransaction interface do not have any checked exceptions. Only runtime exceptions of type PersistenceException or its subclasses result.
For more information about the EntityTransaction interface, see the API documentation.
Parent topic
EntityManager API introduction
Related concepts
EntityManager API introduction
EntityManager in a distributed environment