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Robert Canary wrote:
Is it possible to create an auto-incrementing field in LDAP? I would
like to use it in my uidNumber field from the accoun schema.
It would certain be a wonderfull feature, IMHO.
As somebody already said, it isn't supported in OpenLDAP, but it can be
accomplished at your application layer. I just released code that does
exactly this with an OpenLDAP based weblog application:
The relevant routine is in the file linked with "comment.java" and is
called "getNextIdentifier". When new entries are created in a directory
database with my software, I have a "preCreate" method that enables
internal pre-processing, which for this object includes the creation of
its identifier. Here I call this routine, which when it is first run
will use a simple linear algorithm (I'm sure Howard et al could craft a
better one) to determine the highest identifier value and store it. Any
subsequent creations just increment and pull the next identifier value
from memory. I do this in synchronized blocks to avoid the obvious race
New blog entries should be added to this example on a weekly basis,
starting this weekend. I encourage you and anyone on this list to post
your own comments to see this routine and OpenLDAP in action.