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Logging and Debugging

Here are a few quick tips on getting logging output from the simulator.

Key concepts

The simulator has a logging system accessed via the static object LOG.
The logging system has a 'level' determining how much output is desired. The level can be set on the command line by the -l NUM switch, where NUM can range from 0 (for the least output) to 8 (for the most output).
The logging levels have names and numbers: NONE(0), ERROR(1), WARNING(2), MESSAGE(3), DEBUG(4), DEBUG1(5), DEBUG2(6), DEBUG3(7), and ALL(8).
The logging code provides direct methods for producing output at levels ERROR, WARNING, MESSAGE, and DEBUG. For example:
```
LOG.Debug("Hi there");
```
prints 'Hi there' to the console and the logging buffer – if the logging level is 4 or larger.
LOG offers simple, internally-implemented 'printf-like' functionality.