Log4j: Difference between revisions
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=Concepts= | =Concepts= | ||
Log4j has four fundamental objects: categories, priorities, appenders and layouts. | Log4j has four fundamental objects: categories, priorities, appenders and layouts. | ||
==Category== | |||
A category is a like java named entity. There exists a special root category that simply is, but has no name. | |||
==Priority== | |||
Priority objects have both a string name and an integer value. The name is simply a mnemonic label for the priority. The integer value defines a relative order amongst priorities. | |||
=Configuration= | =Configuration= | ||
Revision as of 10:47, 4 January 2010
Concepts
Log4j has four fundamental objects: categories, priorities, appenders and layouts.
Category
A category is a like java named entity. There exists a special root category that simply is, but has no name.
Priority
Priority objects have both a string name and an integer value. The name is simply a mnemonic label for the priority. The integer value defines a relative order amongst priorities.
Configuration
Properties can be defined by a properties file or by an XML file.
Logging Level are:
- ALL
- DEBUG
- ERROR
- FATAL
- INFO
- OFF
- TRACE
- WARN