Using @Transactional for Subscriptions data fetcher

[MathisPct]

Hello,

We were wondering whether it’s possible to define an execution strategy (or anything else) that would run the data fetchers for each new message in the subscription flux within a transaction, similar to the following code, which handles this for queries and mutations :

public class TransactionalAsyncExecutionStrategy extends AsyncExecutionStrategy {

    public TransactionalAsyncExecutionStrategy(
            final DataFetcherExceptionHandler handler
    ) {
        super(handler);
    }

    @Override
    @Transactional
    public CompletableFuture<ExecutionResult> execute(
            final ExecutionContext executionContext,
            final ExecutionStrategyParameters parameters
    ) throws NonNullableFieldWasNullException {
        return super.execute(executionContext, parameters);
    }
}

How can we cover this case ?

Thank you by advance

Another sources:

https://github.com/spring-projects/spring-graphql/issues/448#issuecomment-1825502735