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From Emmanuel Lecharny <elecha...@apache.org>
Subject Re: Problem of JDBM being hard(impossible) to reconfigure once it is initialized
Date Wed, 16 May 2012 06:44:05 GMT
hi Göktürk, I'll check that tonite. I'm a bit on hold atm, dealing with
some familly stuff.

thanks
Le 16 mai 2012 05:58, "Göktürk Gezer" <gokturk.gezer@gmail.com> a écrit :

> Hi Everyone,
>
> As i told you in OSGI branch update, JDBM is so immutable in runtime.
> Almost every setter calls checkInitialized() method first which throws an
> exception when its already initialized.
>
> We have to change that behavior in as much aspects of it as we can.
> Otherwise there is no point in going into OSGI. However i can't always be
> sure what my changes might lead on runtime. I need some serious help here,
> especially from those are actively working on JDBM, otherwise i'll jump
> into trial and error cycle which will probably last long.
>
> Here is the current configuration points for JdbmPartition:
>
>    - cacheSize(int)
>    - optimizerEnabled(boolean)
>    - partitionPath(File)
>    - suffixDn(Dn)
>    - syncOnWrite(boolean)
>    - indexedAttributes(List<Index>)
>
> Currently none of them is reconfigurable, once the partition is
> initialized. However i need to know which are actually reconfigurable among
> these ones. And which are not really reconfigurable and why?
>
> Every reconfiguration will invoke some setter method at desired
> configuration point. So i guess we can make this reconfigurations work
> actually based on it's initialized or not, rather than throwing an
> exception blindly.
>
> For your information, as we have the lifecycle control capability of
> components created from within ApacheDS, we can implement some fancy stuff.
> Like re-instantiating a component when one of its immutable property is
> changed, or stop it and remove from DirectoryService when one of its
> immutable property is changed to prevent accepting operations while
> reconfiguring. These migtht be implemented in case there is " no
> possibility! " to handle reconfigurations in live and initialized
> JdbmPartition reference.
>
> I appreciate every single idea on this matter !
>
> Thanks,
> Gokturk
>

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