On Monday 30 May 2005 23:00, Sakesun Roykiattisak wrote:
> I have a large set of database logics in python. All of them are in
> similar forms like this:
> >>> inven = Inventory(dbconnection)
> >>> inven.getBillOfMaterial(itemId='10020')
> [('1134', 12), ('23522', 32)]
> I'm now investigating the best way to to publish them via zope3.
> I need some suggestion on these question.
You might want to have a look at SQLOS. See http://codespeak.net/z3/sqlos
> 1. How can I get the "dbconection" ? My database is Microsoft SQL
> Server. My dbapi is adodbapi.
> Should I study gadflyda code and try to implement adodbapida for this ?
You need to implement a Database Adapter for adodbapi. See
for examples. It is pretty easy.
> 2. Since zope.app.rdb.ZopeDatabaseAdapter is to be used as a local
> service, that mean there will be
> one instance per thread like other zodb object; is that correct ? Will
> the connection be flushed away
> after a transaction finished ? If yes, how to avoid that ?
No, the connection is kept as far as I can tell.
> 3. What I should do in case that sometime my database might be
> unavailable, and I want my connection
> to be reestablished where it come back. How can I detect those events
> and reestablish the connection
> when the certain type of exception was raised (like connection closed by
> network error)
You would have to write special application-level code to handle this. For
example, you could try to send a test query to check for the connection. If
no response is received, you create a new connection.
CBU Physics & Chemistry (B.S.) / Tufts Physics (Ph.D. student)
Web2k - Web Software Design, Development and Training
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