If I understand you correctly, your job is is put the information gotten to a database. Someone else's job is to get that info. Right?
It shouldn't really matter how the information gets to you (very OO). What you two need to decide on is how you will transfer that info intially. Will s/he pass you a string (this is how it comes from a com port, usually) that you have to parse? Maybe a better idea is to pass you an Object, or an .xml file. That way you two can program to a well-know standard.
Anyway, once you decide, you can
test your end by creating test objects/text strings/xml and pass them to yourself. I do this all the time.
Not really sure if this helps. Let me know.