Hi All
I am trying to extend log4j to achieve the following.
I need to log custom information, like action, machine origin in a XML
format, as well as all the other standard information that log4j provides.
An example of this in action is
cat.info ("This is a test", ACTION.test, MACHINE.transmissionEngine1 );
To accomplish this I have written a VineCategory, VineCategoryFactory,
VineLoggingEvent.
To accomplish the XML output, I have written VineInfoLayout and
VineErrorLayout. ( I have different data requirements for reporting errors).
My VineInfoLayout extends layout and I have overwritten the format method.
// example of format method
public String format(LoggingEvent event) {
buf.setLength (0);
if (event instanceof VineLoggingEvent) {
VineLoggingEvent vineEvent = (VineLoggingEvent)event;
buf.append ("<type>"+vineEvent.type+"</type>"); // the rest of code to
follow
} else {
buf.append("Not a vineEvent" ); // would like to format the event as
per normal, a pattern layout
}
return buf.toString();
}
I do have some problems and converns. The main one being, if a 'normal' call
to info is made. I would like a seperate patternLayout to be used. So the
problem is, from the format method in my layout class, how do I now call a
different paternLayout (or a different appender?). Which leads to my
concern ---- Am I on the right track? It doesn't seem what I am doing is
simple or neat. (Sorry if it just means I still do not have a proper
understanding of log4j).
Thanks in advance
Jeff Singer
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