[news.eclipse.newcomer] Who should log an Exception

[Felix Dorner <felix_do@xxxxxx>]

Although this is quite a general question, I think it appears especially 
important in such a diverse environment as the Eclipse Platform:

In my plug-in I invoke some code of another plug-in. This code might 
throw an exception that I'd catch in my plug-in. I log that exception to 
make sure it doesn't get lost. Now it happens to be the case that the 
other plug-in also logged that exception (in this concrete case I refer 
to org.eclipse.core.ant.AntRunner) so I get the same thing twice in the 
error log.

Here are the two approaches that I think of. AntRunner would take the 
first one.

1. Log the exception as soon as possible. So the callee is responsible 
of logging it before passing it to the caller.

2. If you throw it, don't log it.

Any thoughts? I guess there's no 'right' one, but maybe the AntRunner 
case is just the one that's generally been followed?

Thanks.
Felix