Need to configure my JPA layer to use a TransactionManager (Spring Cloud Task + Batch register a PlatformTransactionManager unexpectedly)

Question

I am using Spring Cloud Task + Batch in a project. I plan to use different datasources for business data and Spring audit data on the task. So I configured som

Answer 1

The problem comes when SimpleBatchConfiguration+DefaultBatchConfigurer expose a PlatformTransactionManager bean,

As you mentioned, this is indeed what was reported in BATCH-2788. The solution we are exploring is to expose the transaction manager bean only if Spring Batch creates it.

In the meantime you can set the property spring.main.allow-bean-definition-overriding=true to allow bean definition overriding and set the transaction manager you want Spring Batch to use with BatchConfigurer#getTransactionManager. In your case, it would be something like:

@Bean
public BatchConfigurer batchConfigurer() {
    return new DefaultBatchConfigurer(this.singletonNotExposedSpringDatasource()) {
        @Override
        public PlatformTransactionManager getTransactionManager() {
            return new MyTransactionManager();
        }
    };
}

Hope this helps.