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From "Anjan" <>
Subject RE: Question about DBCP
Date Tue, 30 Apr 2002 16:42:16 GMT
Hi Eric!,

	I was using poolman in our NON open-source product but eventually
moved to DBCP -- it works fine for me.

	Did you look at in the doc directory ?
This gives a sample of how the DriverManager uses the "jdbc.drivers"

	When DriverManager loads, it looks for the property jdbc.drivers
and then loads all the drivers specified in this property(Be sure to
separate the drivers in this property using COLONs and NOT SEMI-COLONs.
You don't have to use Class.forName() on it since JDBC(1.2 JDK and later)
uses this property to load all the drivers and initialize the
the drivers register with the DriverManager when they are loaded).

If you want to know more, you can look into the source of DriverManager in
the JDK
	You will know that pooling is working by the speed with which the
are obtained when you use DriverManager.getConnection(url);

Best Regards,

-----Original Message-----
From: Eric Pugh []
Sent: Tuesday, April 30, 2002 7:20 AM
To: 'Jakarta Commons Developers List'
Subject: Question about DBCP

Hi all,

Can anyone provide pointers to open source sites using DBCP?  I am trying to
get DBCP to work with DbForms (  DbForms currently uses
Poolman as it's suggested pool for JDBC connections, but it badly needs
something newer and easier to set up!

I have managed to tweak the class ManualPoolingDataSourceExample to work
with MSSql Server.  However, what is confusing to me is how in the example
my jdbc driver is passed in?  I see it goes in from the commandline
as -Djdbc.drivers=oracle.jdbc.driver.OracleDriver, but I never see how it
get's used.  In addition, when i hardcoded my driver, I couldn't get it to
work until I added a
Class.forName("") at the top of
the code in my copy of ManualPoolingDataSourceExample.

Can someone give me some pointers on how the -Djdbc.drivers value actually
get's registered with the DriverManager?

Also, how can I verify that I am actually pooling connections, versus
creating a new one over and over?

I have attached my copy of ManualPoolingDataSourceExample that I have
renamed to ManualPoolingDataSourceTest, and am using under JUnit to test.


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