In my current web application, i use @RestController with CompletableFuture result for all services.
Database operations are asynchronous (CompletableFuture methods), but i would like commit operations only before send result
i would like to commit database modifications after --save-- asynchronous ended (--save-- is a list of future business)
@RestController
public class MyController {
...
@RequestMappping(...)
public CompletableFuture<ResponseEntity<AnyResource>> service(...){
CompletableFuture ...
.thenCompose(--check--)
.thenAsync(--save--)
...ect
.thenApply(
return ResponseEntity.ok().body(theResource);
);
}
}
-> i've tried with @Transactional, but it doesn't work (commit at the method's end but async method partially or not executed
-> Other way with programmatic :
@RequestMappping(...)
public CompletableFuture<ResponseEntity<AnyResource>> service(...){
DefaultTransactionDefinition def = new DefaultTransactionDefinition();
// explicitly setting the transaction name is something that can only be done programmatically
def.setName("SomeTxName");
def.setPropagationBehavior(TransactionDefinition.PROPAGATION_REQUIRED);
TransactionStatus status = this.platformTransactionManager.getTransaction(def);
CompletableFuture ...
.thenCompose(--check--)
.thenAsync(--save--)
...ect
.thenApply(
this.platformTransactionManager.commit(status)
return ResponseEntity.ok().body(theResource);
);
}
An error occured "Cannot deactivate transaction synchronization - not active", supposed because not the same thread.
Is there a proper way, to use transactional with CompletableFuture ?
