CM Bug?

[Michael Gentry <mg...@masslight.net>]

Can anyone else confirm this?  It has happened to me twice today so far.

I have a local data source defined (in CM preferences).  If I change
models, the local data source goes away.  Permanently.  It isn't even
there if I open up the original model I had been using where I know I
had the data source.  Also, the ClassPath setting in CM preferences
gets nuked, too.  Maybe more.

Re: CM Bug?

[Andrus Adamchik <an...@objectstyle.org>]

Some preferences are indeed per project, with the key tied to the  
absolute filesystem path.

Andrus

On Sep 29, 2009, at 4:48 PM, Michael Gentry wrote:

> H2 might be worth trying, but it seems to me that CM resets the
> preferences when you open or create a new model.  I'd have to dig in
> the code a bit, but it sure felt that way the past few days ...
>
> On Tue, Sep 29, 2009 at 3:29 AM, Andrus Adamchik <andrus@objectstyle.org 
> > wrote:
>>
>> On Sep 29, 2009, at 10:23 AM, Adrian A. wrote:
>>
>>> Wouldn't simply replacing HSQLDB with H2 (http:// 
>>> www.h2database.com/)
>>> solve the problem with far less effort?
>>
>> Possibly. H2 option had been discussed, but I guess nobody ever  
>> tried it.
>> Thanks for the hint.
>>
>> Andrus
>>
>>
>

Re: CM Bug?

[Michael Gentry <mg...@masslight.net>]

H2 might be worth trying, but it seems to me that CM resets the
preferences when you open or create a new model.  I'd have to dig in
the code a bit, but it sure felt that way the past few days ...

On Tue, Sep 29, 2009 at 3:29 AM, Andrus Adamchik <an...@objectstyle.org> wrote:
>
> On Sep 29, 2009, at 10:23 AM, Adrian A. wrote:
>
>> Wouldn't simply replacing HSQLDB with H2 (http://www.h2database.com/)
>> solve the problem with far less effort?
>
> Possibly. H2 option had been discussed, but I guess nobody ever tried it.
> Thanks for the hint.
>
> Andrus
>
>

Re: CM Bug?

[Andrus Adamchik <an...@objectstyle.org>]

On Sep 29, 2009, at 10:23 AM, Adrian A. wrote:

> Wouldn't simply replacing HSQLDB with H2 (http:// 
> www.h2database.com/) solve the problem with far less effort?

Possibly. H2 option had been discussed, but I guess nobody ever tried  
it. Thanks for the hint.

Andrus

Re: CM Bug?

["Adrian A." <a....@gmail.com>]

> This could be due to the long standing preferences stability bug. Check 
> ~/.cayenne/prefs/1.2 directory. If you see a bunch of db1.XXX, db2.XXX 
> files, it means the prefs db is in a bad state. In this case my 
> suggestion is to stop the Modeler and rm -rf the entire 
> ~/.cayenne/prefs/1.2 folder.
Isn't this maybe because of the used HSQLDB?

> I hope Olga may have some time to look at Modeler preferences rework for 
> 3.0 to use built-in Java preferences API instead of relying on the 
> embeddable DB's.
Wouldn't simply replacing HSQLDB with H2 (http://www.h2database.com/) 
solve the problem with far less effort?
I guess it could also bring some nice performance improvements since H2 
is faster - besides missing features from HSQLDB such as:
   - Transaction Isolation
   - Encrypted Database
   - Updatable Result Sets, etc.

Adrian.

Re: CM Bug?

[Andrus Adamchik <an...@objectstyle.org>]

This could be due to the long standing preferences stability bug.  
Check ~/.cayenne/prefs/1.2 directory. If you see a bunch of db1.XXX,  
db2.XXX files, it means the prefs db is in a bad state. In this case  
my suggestion is to stop the Modeler and rm -rf the entire ~/.cayenne/ 
prefs/1.2 folder.

I hope Olga may have some time to look at Modeler preferences rework  
for 3.0 to use built-in Java preferences API instead of relying on the  
embeddable DB's.

Andrus


On Sep 28, 2009, at 10:28 PM, Michael Gentry wrote:
> Can anyone else confirm this?  It has happened to me twice today so  
> far.
>
> I have a local data source defined (in CM preferences).  If I change
> models, the local data source goes away.  Permanently.  It isn't even
> there if I open up the original model I had been using where I know I
> had the data source.  Also, the ClassPath setting in CM preferences
> gets nuked, too.  Maybe more.
>