How to get the on exception retry delay from database??

In an on exception cluse how to get the retry delay from database. Here is
the scenario

1. Exception caught in on exception clues. We use retryWhile() with a bean
to get get the number of retries from database.
2. But not sure how to get the retry delay from databse and set in
redeliveryDelay(Long l) because this api only supports property place
holder.

Regards,
PradeepN