How to "roll back" the model if a database update fails

I'd like to know if there's a way to "roll back" the model (the values in the managed beans) if a service call to a database fails during the Invoke Application phase. My understanding of the JSF lifecycle is that the values in the model are updated before a service call to a database would happen. If the database update operation fails, it seems to me that the data in the model and the database would be inconsistent.
For example, say I have a ridiculously simple application that updates a names database. The fields are id, last name, first name. The application has a simple view that allows the user to update a name in the database. The user updates the last name field for a particular record from "Doe" to "Smith" and clicks "submit". The request goes through the lifecycle, the model values are updated from the web form during the Update Model Values phase, then the call to update the database fails during the Invoke Applications phase (the database connection failed). When the Render Response phase completes, the UI would display an error message where I put <h:messages> but the last name value in the UI would show "Smith" instead of "Doe". Is there something I can do to roll the model value back to "Doe" if the database call fails?
I know that I could redirect to a technical error page, but I'd like to avoid it unless it is the best thing to do.
I'd appreciate any advice you can offer.
Thanks.
- Luke

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