Log4j Concepts: Difference between revisions
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[[#Category|Category]] deprecation note: Logger is a subclass of [[#Category|Category]] and extends it. [[#Category|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. | [[#Category|Category]] deprecation note: Logger is a subclass of [[#Category|Category]] and extends it. [[#Category|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: | |||
<pre> | |||
Logger log = LogManager.getLogger("some-name"); | |||
</pre> | |||
=Log Levels= | =Log Levels= | ||
Revision as of 00:02, 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.