[Fedora-directory-users] Use of SLAPI_PLUGIN_BE_POST_MODIFY_FN

[Rich Megginson]

Eric wrote:
> I would like to perform an action if and only if a database operation succeeds,
You can do this.
> as well as revert that database operation if the action fails.
You can't do this.  That is, you can't revert another prior operation.
> From the documentation I understand I should wrap both in a transaction and implement it through these parameters: SLAPI_PLUGIN_BE_POST_MODIFY_FN, SLAPI_PLUGIN_BE_POST_ADD_FN, SLAPI_PLUGIN_BE_POST_DELETE_FN.
>   
It might be possible, but you'd have to hack the database code in order 
to get all of your operations into a single database transaction.  BE 
plugins are called inside the database lock, so you can be assured that 
your code will be called with the database in a consistent state, but 
you can't use them to add other operations to the transaction.
> However I'm not sure how to write that transaction. Is there a code sample? How should I configure the plugin -- nsslapd-plugintype: postperation doesn't seem to be the right type...
>
>
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>   

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