Log4j Concepts: Difference between revisions

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:This class has been deprecated and replaced with the [[#Logger|Logger]] subclass. There is no need for new client code to use or refer to the Category class.
:This class has been deprecated and replaced with the [[#Logger|Logger]] subclass. There is no need for new client code to use or refer to the Category class.
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Revision as of 00:03, 8 August 2016

Internal

Logger

Logger is the central class in the log4j package. Most logging operations, except configuration, are done through this class.

Category deprecation note: Logger is a subclass of Category and extends it. Category has been deprecated. Internally, whenever log4j is asked to produce a Category object, it will instead produce a Logger object. In order to preserve backward compatibility, methods that previously accepted category objects still continue to accept category objects.

Creating a Logger Instance

The recommended way to create Logger instance is to request them by name from the LogManager:

Logger log = LogManager.getLogger("some-name");

Log Levels

Category

This class has been deprecated and replaced with the Logger subclass. There is no need for new client code to use or refer to the Category class.

Appender