All Debug Info Warn Error Fatal Off
Contents |
All Implemented Interfaces: Serializable Direct Known Subclasses: UtilLoggingLevel public class Levelextends log level hierarchy Priorityimplements Serializable Defines the minimum set of
Log4j Debug Levels
levels recognized by the system, that is OFF, FATAL, ERROR, WARN, INFODEBUG and ALL. The Level class may be subclassed to define a larger level set. Author: Ceki Gülcü
Logger Levels Java
See Also:Serialized Form Field Summary staticLevel ALL The ALL has the lowest possible rank and is intended to turn on all logging. staticLevel DEBUG The DEBUG Level designates slf4j log levels fine-grained informational events that are most useful to debug an application. staticLevel ERROR The ERROR level designates error events that might still allow the application to continue running. staticLevel FATAL The FATAL level designates very severe error events that will presumably lead the application to abort. staticLevel INFO The INFO level designates informational messages that highlight the progress of the application at coarse-grained level. staticLevel OFF The OFF has the highest possible rank and is intended to turn off logging. staticLevel TRACE The TRACE Level designates
Pooling(DRCP) IBM Systems Director » Log4J Levels: ALL > TRACE > DEBUG > INFO > WARN > ERROR > FATAL >OFF 2009/11/17 作者:Jesse Hu Loggers may be assigned levels. The set of possible levels,
Log4j Trace
that is DEBUG, INFO, WARN, ERROR and FATAL are defined in the org.apache.log4j.Level class.
Trace Level Definition
If a given logger is not assigned a level, then it inherits one from its closest ancestor with an assigned debug level samsung level. The root logger resides at the top of the logger hierarchy. It always exists and always has an assigned level. The logger is the core component of the logging process. In log4j, there are https://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html 5 normal levels Levels of logger available (not including custom Levels), the following is borrowed from the log4j API (http://jakarta.apache.org/log4j/docs/api/index.html): DEBUG - The DEBUG Level designates fine-grained informational events that are most useful to debug an application. INFO - The INFO level designates informational messages that highlight the progress of the application at coarse-grained level. WARN - The WARN level designates potentially harmful situations. ERROR - The ERROR level https://jessehu.wordpress.com/2009/11/17/log4j-levels-all-trace-debug-info-warn-error-fatal-off/ designates error events that might still allow the application to continue running. TRACE - The TRACE Level designates finer-grained informational events than the DEBUG FATAL - The FATAL level designates very severe error events that will presumably lead the application to abort. In addition, there are two special levels of logging available: (descriptions borrowed from the log4j API http://jakarta.apache.org/log4j/docs/api/index.html): ALL -The ALL Level has the lowest possible rank and is intended to turn on all logging. OFF - The OFF Level has the highest possible rank and is intended to turn off logging. source: http://www.allapplabs.com/log4j/log4j_levels.htm http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Level.html 赞过:赞 正在加载…… 相关 发表在 Uncategorized | Tagged java, log4j, tips | 5条评论 5条回应 于 2013/09/05 在 9:35 下午 | 回复 ERROR, INFO, DEBUG, FATAL ERROR, INFO, DEBUG, FATAL 于 2015/06/14 在 5:50 下午 | 回复 konoron > DEBUG – The DEBUG Level designates fine-grained informational events that are most useful to debug an application. > TRACE – The TRACE Level designates finer-grained informational events than the DEBUG Any examples of their differences? Thank you. 于 2015/10/01 在 12:30 上午 | 回复 bloodgain @konoron: DEBUG - Information the developer might use to debug the application, but is not useful to normal log users. For example: variable values, partial calculatio
log4j - Configuration log4j - Sample Program log4j - Logging Methods log4j - Logging Levels log4j - Log Formatting log4j - Logging in Files log4j https://www.tutorialspoint.com/log4j/log4j_logging_levels.htm - Logging in Database log4j Useful Resources log4j - Questions and Answers log4j - Quick Guide log4j - Useful Resources log4j - Discussion Selected Reading Developer's Best Practices Questions and Answers Effective Resume Writing HR Interview Questions Computer Glossary Who is Who log4j - Logging Levels Advertisements Previous Page Next Page The org.apache.log4j.Level levels. You can also define log level your custom levels by sub-classing the Level class. Level Description ALL All levels including custom levels. DEBUG Designates fine-grained informational events that are most useful to debug an application. ERROR Designates error events that might still allow the application to continue running. FATAL Designates very severe error events that will presumably lead the application to abort. INFO Designates informational all debug info messages that highlight the progress of the application at coarse-grained level. OFF The highest possible rank and is intended to turn off logging. TRACE Designates finer-grained informational events than the DEBUG. WARN Designates potentially harmful situations. How do Levels Works? A log request of level p in a logger with level q is enabled if p >= q. This rule is at the heart of log4j. It assumes that levels are ordered. For the standard levels, we have ALL < DEBUG < INFO < WARN < ERROR < FATAL < OFF. The Following example shows how we can filter all our DEBUG and INFO messages. This program uses of logger method setLevel(Level.X) to set a desired logging level: This example would print all the messages except Debug and Info: import org.apache.log4j.*; public class LogClass { private static org.apache.log4j.Logger log = Logger.getLogger(LogClass.class); public static void main(String[] args) { log.setLevel(Level.WARN); log.trace("Trace Message!"); log.debug("Debug Message!"); log.info("Info Message!"); log.warn("Warn Message!"); log.error("Error Message!"); log.fatal("Fatal Message!"); } } When you compile and run the LogClass program, it would generate the following r