Loggers

Loggers show you what is happening in the system at any given moment. One Network SDK provides a logging service based on the popular log4j framework.

There are several log files which are kept as the server runs. The display used most widely by developers is simply the server window display itself. You need physical or remote desktop access to the computer where the server is running to view this console window.

The same logging data is recorded in text files on servers running in test and production environments. The log level refers to the level of detail used in logging. You can change the settings along a gamut ranging from extremely verbose logs down to a setting which only records the worst production stopping error messages. You might think verbosity is the default and most desirable setting, however the settings at those levels are very detailed and tend to slow the execution of the server, as well as make it very difficult to locate the messages you are interested in. Fortunately there are a number of useful "intermediate" settings which allow you to focus on particular types of messages common to the development process.

• Setting Log Levels for a Specific Class

• Setting the Log Level on Multiple Classes

• Adding Logger Calls to Your Code