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From Dirk Verbeeck <>
Subject Re: [dbcp] Monitoring of handed out connections
Date Thu, 11 Mar 2004 21:18:10 GMT
Hi Phil,

What version of tomcat are you using?

-- Dirk wrote:

> Hi,
> to get noticed about the number of connections, which are handed out by the 
> data source, we extended BasicDataSource. getConnection() was overwritten 
> so that everytime a connection is released a log file entry is written. At 
> first we used log4J for Logging, but we had to recognize, that placing our 
> new jar and a jar for log4j into common/lib under the tomcat tree, results 
> in an error of another webapp, which was supposed to use its own log4j but 
> now acts on the one, which is placed in common/lib (<-- this seems to be a 
> mistake in class loading because it is describe just the other way around 
> on tomcat homepage).
> Anyway, we are looking for a new way to do the monitoring. One solution 
> could be using a tomcat FileLogger. But the problem will be the classloader 
> again. Since our data source has to be placed under common/lib, the 
> FileLogger is part of catalina.jar, which is actually under server/lib, we 
> won't be able to make an instance from catalina FileLogger in our extended 
> data source.
> So my question is, has anybody ever faced a similiar problem or does 
> anybody know of a solution to this ?? Monitoring of data sources is a very 
> important task here at the moment.
> Thanks,
> Phil.

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