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From josh <j...@ink.org>
Subject Re: ibatis and jndi pooling
Date Tue, 27 Jul 2004 21:21:44 GMT
vic,

thanks for the reply.  let me clarify my problem.  When I create a
connection to the db using connection pooling (as illustrated in my
first email) I could do something like the following...

Connection conn = ds.getConnection();

... use this connection to access the database ...

conn.close();

but this doesn't really close anything, rather it returns the connection
back to the pool for later use.  So that is why I always did something
like this in the destroy method of my plugin...

((BasicDataSource) ds).close();

That would actually kill the connection to the DB after my application
was removed or reloaded on the server.  It turns out that this works for
sqlMaps too.  I just get a reference to the datasource and close it in
the destroy method of the plugin.  If I don't do this, and my
application gets reloaded many times, then I leave behind many
connections to the DB forcing me to bring down tomcat in order to close
them (for my DB admin who gets irate).

It makes me think that I am not doing something at the server level that
I should be doing.  Any ideas?

cheers,
josh
On Tue, 2004-07-27 at 14:31, Vic Cekvenich wrote:
> josh wrote:
> > I am trying to figure out how to use sqlmaps and struts.  Before sqlMaps
> > I would create a connection to the database using a plugin.  In my
> > init() I did something like this
> > 
> > this.ds = (DataSource) context.lookup("java:comp/env/" + lookupString);
> > 
> > This gave me a datasource object that I could use for my app, and I
> > could close the connection in the destroy() method of the plugin to be
> > sure that my connections would get closed up if tomcat were to be
> > restarted.
> > 
> > Now that I use sqlMaps I still use a plugin, but there is no equivalent
> > close function to use in the destroy() method of the plugin. 
> 
> It's becuase SQL maps does it for you!
> 
> You should try it just making connections in SQL maps for now.
> Then, if you want move to having container making a DataSourcePool and 
> SQLMaps just using that pool.
> .V
> 
>   This means
> > that if I remove my app from the server or restart it the old DB
> > connection gets orphaned but doesn't die.  And meanwhile my app gets a
> > new connection to the DB.  How do other people deal with this?  Am I
> > doing this completely wrong?  I can't find anything in the sqlMaps
> > documentation about this.
> > 
> >  
> 
> 
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-- 
Joshua Cronemeyer
Developer
accessKansas - a service of the Information Network of Kansas, Inc.
www.accesskansas.org <http://www.accesskansas.org/>
785-296-2816 (phone)
785-296-5563 (fax)
josh@ink.org <mailto:josh@ink.org>

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