Read / Write XPages with Managed Beans patterns after Submit

Read / Write XPages with Managed Beans patterns after Submit

Transitioning to XPage development with Java only. I've successfully put
together a XPage with a form and bound all UI components to a managed
bean. I created a save method in the bean. I am able to Submit the XPage,
a document is created and the browser displays the XPage after the full
refresh with the current values in the Bean. If I click Save repeatedly, a
new document is always created, the first document that was created was
never updated. My question, what is the proper way to map the XPage to the
current document so the bean always updates the document rather than
always creating a new one? Should I create a Bean member Document so the
first time the document is saved, I keep a handle to it? or should I
lookup the doc every time when saving the unid? does that mean I do not
recycle the doc object after creation? Any one have a good programming
pattern? Using Notes 9, no data source defined on the page.