Useful Object Renderers

[Da...@ubs.com]

Hi all,

I'm wondering whether there are any useful object renderers that I haven't heard about, hopefully downloadable and easily integratable. Things I'd be looking to output without having to have long debugging logic in my code would be beans, JDBC ResultSet rows, and so on. Looking around the log4j codebase all I can see is one jms and one sax renderers, both rather basic.

It seems to me that this would be a very useful feature, improving the quality of usage practice with log4j. Just like layout patterns which allow you to log the locational information and avoid keeping such information in the log messages themselves (and thus having to maintain log messages such as log.debug("entering xyz.foo()") - much better as log.debug("entering")), standard object renderers reduce the complexity of the logging code. For instance, when wanting to output the contents of a bean, it would be nice to be able to just type:

log.debug(myBean);

Given the way object renderers work, that is of course not possible since beans are not subclasses of a particular class. One way to get around that would be for the logger to recognize an org.apache.log4j.BeanWrapper class so that this could be called like:

log.debug(new BeanWrapper(myBean));

In any case, I think the inclusion of more useful standard Object Renderers into the log4j codebase would be a very good thing for log4j, and I'm wondering why this hasn't been done yet. Are there any reasons that I'm not aware of?

Thanks,

Daniel

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