You are viewing a plain text version of this content. The canonical link for it is here.
Posted to server-user@james.apache.org by "Labib Iskander, Marcus" <ml...@cm4all.com> on 2002/07/12 17:17:00 UTC
RE: GUIDs (Not a JAMES specific question, but the answer might be
)
Hi,
I am not sure, but I think any mailserver relaying a message will provide it
with an id if it yet doesn't have one. Most Clients I think will set one by
itself however.
But in any case I would never trust that. Maybe you will never get two mails
with the same id, but if there is a broken implementation somewhere it could
happen. Don't you want to save the message?
Why dont you simply use incrementing numbers as key. Or more funky ids you
could generate yourself. For reference to other resources or from other
clients you still could maintain the guid as a nonunique key (in the
database design at least; using it in an client application as unique
wouldn't hurt I think).
Cheers,
Marcus
> -----Original Message-----
> From: Gavin Enns [mailto:gavinenns@hotmail.com]
> Sent: Friday, July 12, 2002 4:52 PM
> To: james-user@jakarta.apache.org
> Subject: GUIDs (Not a JAMES specific question, but the answer
> might be)
>
>
> I am currently researching options for a mail system for my
> company. The
> tricky part is that I must find a way to archive messages
> (permanently) in
> such a way that all of the messages are easily accessible
> from an existing
> in-house database. I think that I may have found a solution
> to this problem,
> but I need to figure out what to use as the key for each
> message in the
> database. The obvious choice would be the GUID of a message.
> What I need to
> know is if each message is automatically assigned a GUID and
> if so, where,
> when, how, and how can I access it? If if anyone have any
> suggestions on
> this topic I would greatly appreciate it.
>
> Great Gobs of Thanks,
> Gavin Enns
> Communications Programmer
> Ronneberger Computing Inc.
> Brighton, Ontario, Canada
> (613)475-3946 Ext. 42
>
> _________________________________________________________________
> Send and receive Hotmail on your mobile device: http://mobile.msn.com
>
>
> --
> To unsubscribe, e-mail:
<ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>
--
To unsubscribe, e-mail: <ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>
RE: GUIDs (Not a JAMES specific question, but the answer might be)
Posted by "Noel J. Bergman" <no...@devtech.com>.
If he needs a truely unique key, he can use a hash. For reference, see the
Gnutella/HUGE scheme, and then follow references to SHA, etc.
He can also look at the actual GUID recommendations to see how they can be
computed in a distributed environment.
--- Noel
-----Original Message-----
From: Labib Iskander, Marcus [mailto:ml@cm4all.com]
Sent: Friday, July 12, 2002 11:17
To: 'James Users List'
Subject: RE: GUIDs (Not a JAMES specific question, but the answer might
be)
Hi,
I am not sure, but I think any mailserver relaying a message will provide it
with an id if it yet doesn't have one. Most Clients I think will set one by
itself however.
But in any case I would never trust that. Maybe you will never get two mails
with the same id, but if there is a broken implementation somewhere it could
happen. Don't you want to save the message?
Why dont you simply use incrementing numbers as key. Or more funky ids you
could generate yourself. For reference to other resources or from other
clients you still could maintain the guid as a nonunique key (in the
database design at least; using it in an client application as unique
wouldn't hurt I think).
Cheers,
Marcus
> -----Original Message-----
> From: Gavin Enns [mailto:gavinenns@hotmail.com]
> Sent: Friday, July 12, 2002 4:52 PM
> To: james-user@jakarta.apache.org
> Subject: GUIDs (Not a JAMES specific question, but the answer
> might be)
>
>
> I am currently researching options for a mail system for my
> company. The tricky part is that I must find a way to archive
> messages (permanently) in such a way that all of the messages
> are easily accessible from an existing in-house database. I
> think that I may have found a solution to this problem,
> but I need to figure out what to use as the key for each
> message in the database. The obvious choice would be the GUID
> of a message.
>
> What I need to know is if each message is automatically assigned
> a GUID and if so, where, when, how, and how can I access it? If
> if anyone have any suggestions on this topic I would greatly
> appreciate it.
>
> Great Gobs of Thanks,
> Gavin Enns
> Communications Programmer
> Ronneberger Computing Inc.
> Brighton, Ontario, Canada
> (613)475-3946 Ext. 42
>
> _________________________________________________________________
> Send and receive Hotmail on your mobile device: http://mobile.msn.com
>
>
> --
> To unsubscribe, e-mail:
<ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>
--
To unsubscribe, e-mail: <ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>
--
To unsubscribe, e-mail: <ma...@jakarta.apache.org>
For additional commands, e-mail: <ma...@jakarta.apache.org>