Accessing the same database with 2 access methods

["Vladimir R. Bossicard" <vl...@bossicard.com>]

Hi all,

I'm currently accessing the same database with the embed and xmlrpc
drivers.  I have my Tomcat server running and I can view the content of
the database.

But when I create a collection using the xindice command in local mode
(-l -d) (i.e. using the embed driver) it doesn't appear on my Tomcat
browser (XMLRPC).  However the collection is indeed in the db's physical 
folder.

Restarting Tomcat does not solve the problem so I think that collections 
are handled somewhat differently when the database is accessed 
simultaneously.

I haven't had the time to dig too much the problem but if someone can 
give an explanation, it would be great.

-Vladimir

-- 
Vladimir R. Bossicard
www.bossicard.com

Re: Accessing the same database with 2 access methods

["Vladimir R. Bossicard" <vl...@bossicard.com>]

> Vladimir.. what you've done is wrong..  The database should not be 
> accessed simultaneously!!!!!

Well I don't think that it's soo wrong.  I know that it's not common but 
apparently I'm not the only one who tried it :-)

Maybe it could be a nice feature to have a "-force" flag for having the 
server refresh the database structure before each call.

-Vladimir

-- 
Vladimir R. Bossicard
www.bossicard.com

Re: Accessing the same database with 2 access methods

[Fernando Padilla <fe...@interdimensions.com>]

Vladimir.. what you've done is wrong..  The database should not be 
accessed simultaneously!!!!!

The code does no sort of file-level locking or refresh... most of the 
datbase structure might be kept in memory, so though your embedded version 
modified the database, the tomcat version ( in memory ) was not updated, 
and when you closed the tomcat version, it probably overwrote some global 
meta-data which could be why the collection is "gone" after that..

the database should not be accessed simultaneously.. either embedded, or 
not.


On Fri, 25 Oct 2002, Vladimir R. Bossicard wrote:

> Hi all,
> 
> I'm currently accessing the same database with the embed and xmlrpc
> drivers.  I have my Tomcat server running and I can view the content of
> the database.
> 
> But when I create a collection using the xindice command in local mode
> (-l -d) (i.e. using the embed driver) it doesn't appear on my Tomcat
> browser (XMLRPC).  However the collection is indeed in the db's physical 
> folder.
> 
> Restarting Tomcat does not solve the problem so I think that collections 
> are handled somewhat differently when the database is accessed 
> simultaneously.
> 
> I haven't had the time to dig too much the problem but if someone can 
> give an explanation, it would be great.
> 
> -Vladimir
> 
>