IBM SG24-7645-00 manual 7645install.fm, Debug –Info –Warn –Error –Fatal

Draft Document for Review May 23, 2008 10:14 am 7645install.fm

example: log4j.logger.maximo.sql. Loggers form a hierarchy. A logger is defined as an ancestor of another logger if its name followed by a dot is a prefix of the descendant logger name. A logger becomes the parent of a child logger if there are no ancestors between itself and the descendant logger. For example, log4j.logger.maximo.sql is the parent of log4j.logger.maximo.sql.WORKORDER. You can assign the following levels to loggers:

–DEBUG

–INFO

–WARN

–ERROR

–FATAL

2.A level indicates a type of event that the system logs.

3.Appenders: You can send logging requests to multiple destinations. An output destination is called an appender. Appenders can exist for consoles or files. You can associate one or more loggers with a given appender. Alternatively, you can associate a single logger with multiple appenders.

4.Layouts: A layout determines the output format of a log statement. A layout is always associated with an appender. For example, a conversion pattern such as %d{dd MMM yyyy HH:mm:ss:SSS} [%-2p] %m%n results in the following log statement: 2007-05-07 14:07:41,508 [main] INFO MyApp - Entering application.

The Logging application supports two types of loggers: Root and Child. One or more child loggers always inherit from one root logger. In the Logging application, a root logger is termed "root logger," while a child logger is termed "logger."

This application can be used to:

￿Create loggers that are components in the product that prepare log statements to be written to console or log file.

￿Associate the appropriate log level with each logger.

￿De-activate loggers except root loggers.

￿Configure appenders that represent a console or log files to which log statements are written.

–Specify an appropriate file name for an appender.

–Specify a log file size for an appender.

–Associate a logger with multiple appenders.

–Associate an appender with multiple loggers.

Chapter 5. Installation 99