Java Projects - Second Edition

Logging practice

The practice of logging is very simple. If you do not want to spend too much time experimenting with different logging solutions and you do not have a particular requirement, then simply go with slf4j, add the JAR to the dependency list as a compile dependency, and start using logging in the source code.

Since logging is not instance-specific, and loggers implement thread safety, the log objects that we usually use are stored in a static field, and since they are used as long as the class is used, the field is also final. For example, using the slf4j façade, we can get a logger with the following command:

private static final Logger log =
           LoggerFactory.getLogger(MastermindHandler.class);

To get the logger, the logger factory ...