Logging mechanism

These examples were written in the context of the question Click How can I log the number of documents / bytes I've processed?

counterdemo

##GITHUB:https://github.com/itext/i5js-sandbox/blob/master/src/main/java/sandbox/logging/CounterDemoSyso.java##

##GITHUB:https://github.com/itext/i7ns-samples/blob/develop/itext/itext.samples/itext/samples/sandbox/logging/CounterDemo.cs##