As of v4, the BatchConfigurer interface is defined as follows:

public interface BatchConfigurer {

   JobRepository getJobRepository() throws Exception;

   PlatformTransactionManager getTransactionManager() throws Exception;

   JobLauncher getJobLauncher() throws Exception;

   JobExplorer getJobExplorer() throws Exception;

}

The transaction manager is an implementation detail of the job repository. In fact, it is only used to create a transactional proxy around SimpleJobRepository and is not used in the configuration of the JobLauncher and the JobExplorer. The transaction manager is defined here at an incorrect abstraction level.

The method BatchConfigurer#getTransactionManager should be removed. The transaction manager should be configurable at the AbstractJobRepositoryFactoryBean level.