[Biojava-l] Logging in BJ3
Neil Benn
benn at mpi-cbg.de
Tue Oct 21 09:00:44 UTC 2008
Hello,
I'm not sure if I should comment as I have no time to
contribute LOC but I thought I may as well ;).
Mark Schreiber wrote:
> Hi -
>
> I would like to strongly advocate the liberal and extensive use of
> Logging in BioJava3. The lack of this plagued us (me at least) during
> bug fixes in previous versions of BioJava. The default Java logging
> API is very flexible and easily meets our needs. It's also not too
> much effort for developers to put in place (you know you use
> System.println() all over the place anyway).
>
Hmm, that is true but for total completeness you can use
commons-logging, that is very easy to use and much more flexible as it
can encapsulate other logging mechanisms (including JDK1.4 logging
framework). To use it you simply declare a new logger as follows:
private static final Log logger = LogFactory.getLog(<Insert classname
here>);
The rest of it works pretty much the same as below- if you dovetail
commons-logging with log4j then you'll cover the most common case of
logging used in other frameworks - the config files to setup log4j (XML
and preperties fiels) are well documented all over the web.
> <snip>
>
> I know from experience we will definitely get the most value from this
> in the IO parsers and ThingBuilders.
>
> Any thoughts?
>
+1
> - Mark
>
>
>
> private Logger logger = Logger.getLogger("org.biojava.MyClass");
>
> public Object generateObject(String argument){
> logger.entering(""+getClass(), "generateObject", argument);
>
> //expensive logging operation
> if (logger.isLoggable( Level.CONFIG )) {
> logger.config("DB config: "+ getDBConfigInfo());
> }
>
> Object obj = null;
> try{
>
> //do some stuff
> logger.fine("doing stuff");
> obj = new Object();
>
> }catch(Exception ex){
> logger.severe("Failed to do stuff");
> logger.throwing(""+getClass(), "generateObject", ex);
> }
>
> logger.exiting(""+getClass(), "generateObject", obj);
> return obj;
> }
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