Re: Driver Logging

Philip,

Yes this works! Thanks for the help,

Dave

-----Original Message-----
From: pgsql-jdbc-owner(at)postgresql(dot)org
[mailto:pgsql-jdbc-owner(at)postgresql(dot)org] On Behalf Of Philip Crotwell
Sent: October 30, 2001 1:35 PM
To: Dave Cramer
Cc: 'Barry Lind'; pgsql-jdbc(at)postgresql(dot)org
Subject: Re: [JDBC] Driver Logging

Hi

I think the problem is that the property file isn't inside a
"package"???

One thing I often do with log4j properties is put the props file inside
the jar within the same directory as the other .class files, ie in
org/postgresql/. Then use a snippet of code like:

props.load((org.postgresql.Driver.class).getClassLoader().getResourceAsS
tream(
"org/postgresql/postgresql_jdbc.props" ));

That way you are using the same ClassLoader that loaded the
org.postgresql.Driver class.

Maybe helps???

PHilip

On Tue, 30 Oct 2001, Dave Cramer wrote:

> I have been experimenting with adding logging to the driver.
>
> I think it was Gunnar that suggested that I try using log4j. I am
> running into a number of difficulties with this and would like to
> throw them out to see if there are some solutions.
>
> 1) configuring log4j requires an external file to be read, or
> configuration inside the driver at startup time. I have tried putting
> the configuration file log4j.properties into the jar and letting log4j

> initialize itself. This didn't work; it seems the default
> Classloader.getSystemResource("log4j.properties") doesn't find it
> inside the jar?? So I wrote a little code to get it as a resource
> bundle much like the error messages. This worked fine for things that
> load the driver in the usual manner, but then while debugging druid, I

> found that it doesn't load the driver in the "usual" manner but
> instead uses the JarClassLoader. For some reason log4j didn't get
> initialized properly. I am sure I can figure out a way around this,
> but I'm not sure I want to pursue the log4j option much further.
>
> 2)Perceived problems with log4j:
>
> a)we will have to ship another jar with the code.
> b)the log4j.properties file has to be placed somewhere on the
> filesystem and I'm not sure yet where that should be. It may turn out
> that depending on your application the property file has to be
> somewhere different.
> c) I think due to a and b above we are going to make it more
> difficult for new users to get the driver up and running
>
> At this point I am thinking about how to make it default to log
> nothing, and then provide properties for the driver to turn on
> selective logging. My biggest concern is requiring the installation of

> another jar, and the associated problems building the driver
>
> Any suggestions are welcome,
>
> Dave
>
>
>
>
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