How to use the taskservice ?

I have a usecase ,where I need to retry an operation few times till an expirationTime - if it fails. I thought I can use the taskservice as mentioned in https://wiki.hybris.com/pages/viewpage.action?title=task+-+Technical+Guide&spaceKey=release5

But I can see that there is no setRetry() in TaskModel.I dont see it is psble to set in the constructor also.

Any idea, how this values can be set - so that I can control programmatically the retry counts and time interval between each retries.