Guidance required on a custom biztalk adapter

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From time to time, we need to create files that we push out to our
customers. I need to write an adapter that wakes up from time to time (as
scheduled), uses our proprietary API to retrieve data, perform some
processing to it, may be update some data back using our API and then
publish corresponding messages back to BizTalk message box. From there some
standard adapters can be used to pick those messages up and publish them out
to files.

My questions are as follows:



1) I am not sure what kind of adapter I need to write. Sounds like I
need to write a "receive" adapter because it would be publishing messages to
the BizTalk server. But I am not really receiving anything. So the trigger
for the adapter is not arrival of a file or something but rather a timed
signal.

2) The source of data is not the arrival of a file but an unsolicited
query executed against the database (through our API because there is other
stuff going on).

3) Is this a request-response or a one-way.



Essentially, can you get some guidance on what kind of adapter should I
consider.

Thanks in advance :-)


.

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