[RFC][IcedTea-Web]: Add Logging of applet exceptions.

[Andrew Su]

--Snip--
> > >
> > >> + public static Logger logger;
> > >> +
> > >> + static {
> > >> + try {
> > >> + // If logging is enabled, we create logger.
> > >> + if (enableLogging) {
> > >> + String fn = icedteaLogDir + "Plugin" +
> > >> java.lang.System.currentTimeMillis() + ".log";
> > >> + boolean append = false;
> > >> + FileHandler fh = new FileHandler(fn, append);
> > >> + fh.setFormatter(new XMLFormatter());
> > >
> > > Hmm.. is this line saying that logs should be written in XML?
> > Yes, this is to follow the format of how the proprietary plugin does
> > logging. This will keep any tools being used with those logs to
> > continue
> > with our plugin's logs.
> 
> Is there any real advantage to this? Do you have an example of the
> output
> to see how readable it is? I don't think we should do things just
> because
> some proprietary vendor's product does.

Here is an example of how it would look like.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<!DOCTYPE log SYSTEM "logger.dtd">
<log>
<record>
  <date>2011-01-12T10:14:58</date>
  <millis>1294845298608</millis>
  <sequence>0</sequence>
  <logger>net.sourceforge.jnlp.debug.AppletLog</logger>
  <level>FINE</level>
  <class>net.sourceforge.jnlp.debug.AppletLog</class>
  <method>log</method>
  <thread>10</thread>
  <message>java.lang.NullPointerException
	at Democritus.init(Democritus.java:25)
	at sun.applet.AppletPanel.run(AppletPanel.java:436)
	at net.sourceforge.jnlp.NetxPanel.run(NetxPanel.java:69)
	at java.lang.Thread.run(Thread.java:636)
</message>
</record>
</log>


> 
> > >
> > >> + logger =
> > >> Logger.getLogger(AppletLogger.class.getPackage().getName() + "."
> > >> +
> > >> AppletLogger.class.getName());
> > >> + logger.setLevel(Level.ALL);
> > >> + logger.addHandler(fh);
> > >> + }
> > >> + } catch (IOException e) {
> > >> + e.printStackTrace();
> > >> + }
> > >> + }

--Snip--

Regards,
  Andrew