Interface Log
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 public interface LogA simple logging interface abstracting logging APIs. In order to be instantiated successfully by LogFactory, classes that implement this interface must have a constructor that takes a single String parameter representing the "name" of this Log.The six logging levels used by Logare (in order):- trace (the least serious)
- debug
- info
- warn
- error
- fatal (the most serious)
 The mapping of these log levels to the concepts used by the underlying logging system is implementation dependent. The implementation should ensure, though, that this ordering behaves as expected. Performance is often a logging concern. By examining the appropriate property, a component can avoid expensive operations (producing information to be logged). For example, if (log.isDebugEnabled()) { ... do something expensive ... log.debug(theResult); }Configuration of the underlying logging system will generally be done external to the Logging APIs, through whatever mechanism is supported by that system. - Author:
- Scott Sanders, Rod Waldhoff
 
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Method SummaryAll Methods Instance Methods Abstract Methods Modifier and Type Method Description voiddebug(java.lang.Object message)Log a message with debug log level.voiddebug(java.lang.Object message, java.lang.Throwable t)Log an error with debug log level.voiderror(java.lang.Object message)Log a message with error log level.voiderror(java.lang.Object message, java.lang.Throwable t)Log an error with error log level.voidfatal(java.lang.Object message)Log a message with fatal log level.voidfatal(java.lang.Object message, java.lang.Throwable t)Log an error with fatal log level.voidinfo(java.lang.Object message)Log a message with info log level.voidinfo(java.lang.Object message, java.lang.Throwable t)Log an error with info log level.booleanisDebugEnabled()Is debug logging currently enabled?booleanisErrorEnabled()Is error logging currently enabled?booleanisFatalEnabled()Is fatal logging currently enabled?booleanisInfoEnabled()Is info logging currently enabled?booleanisTraceEnabled()Is trace logging currently enabled?booleanisWarnEnabled()Is warn logging currently enabled?voidtrace(java.lang.Object message)Log a message with trace log level.voidtrace(java.lang.Object message, java.lang.Throwable t)Log an error with trace log level.voidwarn(java.lang.Object message)Log a message with warn log level.voidwarn(java.lang.Object message, java.lang.Throwable t)Log an error with warn log level.
 
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Method Detail- 
isDebugEnabledboolean isDebugEnabled() Is debug logging currently enabled? Call this method to prevent having to perform expensive operations (for example, Stringconcatenation) when the log level is more than debug.- Returns:
- trueif debug level logging is enabled, otherwise- false
 
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isErrorEnabledboolean isErrorEnabled() Is error logging currently enabled? Call this method to prevent having to perform expensive operations (for example, Stringconcatenation) when the log level is more than error.- Returns:
- trueif error level logging is enabled, otherwise- false
 
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isFatalEnabledboolean isFatalEnabled() Is fatal logging currently enabled? Call this method to prevent having to perform expensive operations (for example, Stringconcatenation) when the log level is more than fatal.- Returns:
- trueif fatal level logging is enabled, otherwise- false
 
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isInfoEnabledboolean isInfoEnabled() Is info logging currently enabled? Call this method to prevent having to perform expensive operations (for example, Stringconcatenation) when the log level is more than info.- Returns:
- trueif info level logging is enabled, otherwise- false
 
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isTraceEnabledboolean isTraceEnabled() Is trace logging currently enabled? Call this method to prevent having to perform expensive operations (for example, Stringconcatenation) when the log level is more than trace.- Returns:
- trueif trace level logging is enabled, otherwise- false
 
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isWarnEnabledboolean isWarnEnabled() Is warn logging currently enabled? Call this method to prevent having to perform expensive operations (for example, Stringconcatenation) when the log level is more than warn.- Returns:
- trueif warn level logging is enabled, otherwise- false
 
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tracevoid trace(java.lang.Object message) Log a message with trace log level. - Parameters:
- message- log this message
 
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tracevoid trace(java.lang.Object message, java.lang.Throwable t)Log an error with trace log level. - Parameters:
- message- log this message
- t- log this cause
 
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debugvoid debug(java.lang.Object message) Log a message with debug log level. - Parameters:
- message- log this message
 
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debugvoid debug(java.lang.Object message, java.lang.Throwable t)Log an error with debug log level. - Parameters:
- message- log this message
- t- log this cause
 
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infovoid info(java.lang.Object message) Log a message with info log level. - Parameters:
- message- log this message
 
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infovoid info(java.lang.Object message, java.lang.Throwable t)Log an error with info log level. - Parameters:
- message- log this message
- t- log this cause
 
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warnvoid warn(java.lang.Object message) Log a message with warn log level. - Parameters:
- message- log this message
 
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warnvoid warn(java.lang.Object message, java.lang.Throwable t)Log an error with warn log level. - Parameters:
- message- log this message
- t- log this cause
 
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errorvoid error(java.lang.Object message) Log a message with error log level. - Parameters:
- message- log this message
 
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errorvoid error(java.lang.Object message, java.lang.Throwable t)Log an error with error log level. - Parameters:
- message- log this message
- t- log this cause
 
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fatalvoid fatal(java.lang.Object message) Log a message with fatal log level. - Parameters:
- message- log this message
 
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fatalvoid fatal(java.lang.Object message, java.lang.Throwable t)Log an error with fatal log level. - Parameters:
- message- log this message
- t- log this cause
 
 
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