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public interface ILogger
The logging interface, that specifies the methods available for logging.
The six logging levels are (in order):
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);
}
LoggerFactory
Nested Class Summary | |
---|---|
static class |
ILogger.Level
The logging levels available in the logging system. |
Method Summary | |
---|---|
void |
debug(Object message)
Log a message with debug log level. |
void |
debug(Object message,
Throwable t)
Log an error with debug log level. |
void |
error(Object message)
Log a message with error log level. |
void |
error(Object message,
Throwable t)
Log an error with error log level. |
void |
fatal(Object message)
Log a message with fatal log level. |
void |
fatal(Object message,
Throwable t)
Log an error with fatal log level. |
ILogger.Level |
getLevel()
Returns the current minimum logging level logged by this instance. |
void |
info(Object message)
Log a message with info log level. |
void |
info(Object message,
Throwable t)
Log an error with info log level. |
boolean |
isDebugEnabled()
Is debug logging currently enabled? |
boolean |
isErrorEnabled()
Is error logging currently enabled? |
boolean |
isFatalEnabled()
Is fatal logging currently enabled? |
boolean |
isInfoEnabled()
Is info logging currently enabled? |
boolean |
isWarnEnabled()
Is warn logging currently enabled? |
void |
setLevel(ILogger.Level level)
Sets the minimum logging level logged by this logger instance. |
void |
warn(Object message)
Log a message with warn log level. |
void |
warn(Object message,
Throwable t)
Log an error with warn log level. |
Method Detail |
---|
boolean isDebugEnabled()
Is debug logging currently enabled?
Call this method to prevent having to perform expensive operations
(for example, String
concatenation)
when the log level is more than debug.
boolean isErrorEnabled()
Is error logging currently enabled?
Call this method to prevent having to perform expensive operations
(for example, String
concatenation)
when the log level is more than error.
boolean isFatalEnabled()
Is fatal logging currently enabled?
Call this method to prevent having to perform expensive operations
(for example, String
concatenation)
when the log level is more than fatal.
boolean isInfoEnabled()
Is info logging currently enabled?
Call this method to prevent having to perform expensive operations
(for example, String
concatenation)
when the log level is more than info.
boolean isWarnEnabled()
Is warn logging currently enabled?
Call this method to prevent having to perform expensive operations
(for example, String
concatenation)
when the log level is more than warn.
void debug(Object message)
Log a message with debug log level.
message
- log this messagevoid debug(Object message, Throwable t)
Log an error with debug log level.
message
- log this messaget
- log this causevoid info(Object message)
Log a message with info log level.
message
- log this messagevoid info(Object message, Throwable t)
Log an error with info log level.
message
- log this messaget
- log this causevoid warn(Object message)
Log a message with warn log level.
message
- log this messagevoid warn(Object message, Throwable t)
Log an error with warn log level.
message
- log this messaget
- log this causevoid error(Object message)
Log a message with error log level.
message
- log this messagevoid error(Object message, Throwable t)
Log an error with error log level.
message
- log this messaget
- log this causevoid fatal(Object message)
Log a message with fatal log level.
message
- log this messagevoid fatal(Object message, Throwable t)
Log an error with fatal log level.
message
- log this messaget
- log this causeILogger.Level getLevel()
void setLevel(ILogger.Level level)
level
- the priority level.
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