[Zope] Status of DAs
Christopher Petrilli
petrilli@digicool.com
Thu, 08 Jul 1999 09:59:51 -0400
> THIS MESSAGE IS IN MIME FORMAT. Since your mail reader does not understand
this format, some or all of this message may not be legible.
--MS_Mac_OE_3014272791_53693_MIME_Part
Content-type: text/plain; charset="US-ASCII"
Content-transfer-encoding: 7bit
OK gang, I've been beating my head against all the DAs of late, looking for
thread safety issues (the long and the short is nothing is currently fully
thread safe), however, as you read the attached document, you'll understand
that getting them to work in a functional fashion is not going to be hard.
We will be releasing fixed versions of Oracle, ODBC and perhaps one other in
the very near future (this is my next task).
If you see any glaring errors, please let me know, or if you know of tricks
related to making something work in a thread-safe fashion, please let me
know.
Chris
--
| Christopher Petrilli Python Powered Digital Creations, Inc.
| petrilli@digicool.com http://www.digicool.com
--MS_Mac_OE_3014272791_53693_MIME_Part
Content-type: text/plain; name="state-of-the-DA.stx";
x-mac-creator="414C4641";
x-mac-type="54455854"
Content-disposition: attachment
Content-transfer-encoding: base64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--MS_Mac_OE_3014272791_53693_MIME_Part--