Fixes gh-1563

[tiarebalbi]

Simple integration of a SimpleAsyncTaskExecutor.

[snicoll]

Actually, you're creating that bean unconditionally in practice: SimpleAsyncTaskExecutor is in spring-core so it will always be available. The condition is still good IMO but you should add a condition that checks if @EnableAsync has been specified in the configuration.

Usually, when an @EnableXyz annotation is added, a post processor is registered in the context. You should look for that.

[tiarebalbi]

I saw what you told about the original issue, i reviewed the other points and i'll be working to improve this implementation for than be able to resolve the original issue.

[philwebb]

Thanks for the PR but there are complexities that we need to consider carefully before we do this. I think we'll probably try to take this on ourselves later in the year.