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From "Emmanuel Lecharny (JIRA)" <directory-...@incubator.apache.org>
Subject [jira] Commented: (DIREVE-330) Allow the installation of the shutdown handler to be optional for embedded servers
Date Fri, 27 Jan 2006 11:52:34 GMT
    [ http://issues.apache.org/jira/browse/DIREVE-330?page=comments#action_12364204 ] 

Emmanuel Lecharny commented on DIREVE-330:
------------------------------------------

Ok, I get your point.

What you need, is a shutdown service that allows two things :
- Stop accepting new requests, but achieves the current requests
- Allow a kind of ShutDown user to send some last requests to ADS if needed, just before shutdowning
the server smoothly (for instance, it could be "clean this specific context...")

Don't forget that ADS? at this point, is not transactionnal. Operations cannot be encapsulated
into database like transaction, with a commit and rollback (this is a cool feature we need,
however). So your users won't be aware if the server just shutdown. This could be a problem
if you want the users to be able to rollback themself their actions before the server shutown.
Also consider that if the server just crash, you are exactly in the same situation ;)

At least, the GracefulShutdown command is much better than any other slution, in that way
it works smoothly, and can also be extended in a way that allows users to obtain the result
of a time consuming request before the shutdown.

Their are many path to explore, many improvment to develop. But this is pretty much something
to put in the 1.1, 1.2 or 2.0 roadmap. 

I don't know if this answer is acceptable regarding your timeframe, may be Alex has a different
point of view. However, this is really interesting to go farther in your direction, I think.

> Allow the installation of the shutdown handler to be optional for embedded servers
> ----------------------------------------------------------------------------------
>
>          Key: DIREVE-330
>          URL: http://issues.apache.org/jira/browse/DIREVE-330
>      Project: Directory Server
>         Type: Improvement
>   Components: server main
>     Versions: 0.9.4
>  Environment: Windows/UNIX JDK 1.4 - Embedded server within JBoss
>     Reporter: Simon Temple
>     Assignee: Alex Karasulu
>     Priority: Minor

>
> I am using the directory embedded in JBoss.  When we shutdown JBoss our
> application services need to remove certain entries from the directory.
> Unfortunately the shutdown handler in DefaultDirectoryServices closes Eve
> out before we get chance to finish and we get errors:
> org.apache.ldap.common.exception.LdapServiceUnavailableException:
> Context operation unavailable when invoked after Eve provider has been
> shutdown
> When our services finally stop, we stop the directory using the
> ShutdownConfiguration class so we don't really need the additional shutdown
> thread.
> I've commented out the shutdown hook code and our server is now behaving
> how we want but I don't like running with patched source...

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