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http://issues.apache.org/jira/browse/DERBY-1275?page=comments#action_12417497 ] 

Knut Anders Hatlen commented on DERBY-1275:
-------------------------------------------

Hi Kathey, I think your approach sounds reasonable. It is definitely good to 
have some simple way (documented or undocumented) to enable client-side 
tracing. By not documenting it, we don't commit to support it in case we find a 
better way in the future. However, I think it's a good idea that we maintain a 
list of such undocumented features somewhere. Otherwise, I fear that they will 
be forgotten and just make the code less maintainable. What about creating a 
wiki page with undocumented properties/features (clearly labelled as 
unsupported, of course)?

> Provide a way to enable client tracing without changing the application
> -----------------------------------------------------------------------
>
>          Key: DERBY-1275
>          URL: http://issues.apache.org/jira/browse/DERBY-1275
>      Project: Derby
>         Type: Improvement

>   Components: Network Client
>     Versions: 10.2.0.0, 10.1.2.3
>     Reporter: Kathey Marsden
>     Priority: Minor

>
> Currently  the client tracing can be enabled by  setting attributes on the 
> client url, setXXX methods on the DataSource or calling 
> DriverManager.setLogWriter(), but it often cannot be enabled in a deployed 
> client application  because all of these API's require modification of the 
> application or its configuration files.
> It would be good to have a global way to turn on client tracing.  A system 
> property pointing to a property file is  one possibility but probably not 
> ideal because of the impact in class loader contexts.    I am not sure what 
> the other possiblities are,

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