A default logger is instantiated when you create a communicator. The default logger writes its messages to the standard error output. The trace operation accepts a category parameter in addition to the error message; this allows you to separate trace output from different subsystems by sending the output through a filter.
You can obtain the logger that is attached to a communicator using the getLogger operation:
Slice
module Ice {
local interface Communicator {
Logger getLogger();
// ...
};
};