```
public interface Logger
```
Logging abstraction.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`debug(String message)`	Log message with level `DEBUG`.
`void`	`debug(String message, Object arg)`	Log message with level `DEBUG` and with given parameter.
`void`	`debug(String message, Object arg1, Object arg2)`	Log message with level `DEBUG` and with given parameters.
`void`	`debug(String message, Throwable ex)`	Log message with level `DEBUG` and log given exception stacktrace.
`void`	`error(String message)`	Log message with level `ERROR`.
`void`	`error(String message, Object arg)`	Log message with level `ERROR` and with given parameter.
`void`	`error(String message, Object arg1, Object arg2)`	Log message with level `ERROR` and with given parameters.
`void`	`error(String message, Throwable ex)`	Log message with level `ERROR` and log given exception stacktrace.
`void`	`info(String message)`	Log message with level `INFO`.
`void`	`info(String message, Object arg)`	Log message with level `INFO` and with given parameter.
`void`	`info(String message, Object arg1, Object arg2)`	Log message with level `INFO` and with given parameters.
`void`	`info(String message, Throwable ex)`	Log message with level `INFO` and log given exception stacktrace.
`boolean`	`isDebugEnabled()`	Check if `DEBUG` is enabled.
`boolean`	`isErrorEnabled()`	Check if `ERROR` is enabled.
`boolean`	`isInfoEnabled()`	Check if `INFO` is enabled.
`boolean`	`isTraceEnabled()`	Check if `TRACE` is enabled.
`boolean`	`isWarnEnabled()`	Check if `WARN` is enabled.
`void`	`trace(String message)`	Log message with level `TRACE`.
`void`	`trace(String message, Object arg)`	Log message with level `TRACE` and with given parameter.
`void`	`trace(String message, Object arg1, Object arg2)`	Log message with level `TRACE` and with given parameters.
`void`	`trace(String message, Throwable ex)`	Log message with level `TRACE` and log given exception stacktrace.
`void`	`warn(String message)`	Log message with level `WARN`.
`void`	`warn(String message, Object arg)`	Log message with level `WARN` and with given parameter.
`void`	`warn(String message, Object arg1, Object arg2)`	Log message with level `WARN` and with given parameters.
`void`	`warn(String message, Throwable ex)`	Log message with level `WARN` and log given exception stacktrace.

- Method Detail
  - trace
```
void trace(String message)
```
    Log message with level TRACE.
    
    Parameters:
    
    message - Message to log.
  - trace
```
void trace(String message,
           Object arg)
```
    Log message with level TRACE and with given parameter.
    
    Parameters:
    
    message - Message to log.
    
    arg - Log message parameter.
  - trace
```
void trace(String message,
           Object arg1,
           Object arg2)
```
    Log message with level TRACE and with given parameters.
    
    Parameters:
    
    message - Message to log.
    
    arg1 - First log message parameter.
    
    arg2 - Second log message parameter.
  - trace
```
void trace(String message,
           Throwable ex)
```
    Log message with level TRACE and log given exception stacktrace.
    
    Parameters:
    
    message - Message to log.
    
    ex - The exception.
  - debug
```
void debug(String message)
```
    Log message with level DEBUG.
    
    Parameters:
    
    message - Message to log.
  - debug
```
void debug(String message,
           Object arg)
```
    Log message with level DEBUG and with given parameter.
    
    Parameters:
    
    message - Message to log.
    
    arg - Log message parameter.
  - debug
```
void debug(String message,
           Object arg1,
           Object arg2)
```
    Log message with level DEBUG and with given parameters.
    
    Parameters:
    
    message - Message to log.
    
    arg1 - First log message parameter.
    
    arg2 - Second log message parameter.
  - debug
```
void debug(String message,
           Throwable ex)
```
    Log message with level DEBUG and log given exception stacktrace.
    
    Parameters:
    
    message - Message to log.
    
    ex - The exception.
  - info
```
void info(String message)
```
    Log message with level INFO.
    
    Parameters:
    
    message - Message to log.
  - info
```
void info(String message,
          Object arg)
```
    Log message with level INFO and with given parameter.
    
    Parameters:
    
    message - Message to log.
    
    arg - Log message parameter.
  - info
```
void info(String message,
          Object arg1,
          Object arg2)
```
    Log message with level INFO and with given parameters.
    
    Parameters:
    
    message - Message to log.
    
    arg1 - First log message parameter.
    
    arg2 - Second log message parameter.
  - info
```
void info(String message,
          Throwable ex)
```
    Log message with level INFO and log given exception stacktrace.
    
    Parameters:
    
    message - Message to log.
    
    ex - The exception.
  - warn
```
void warn(String message)
```
    Log message with level WARN.
    
    Parameters:
    
    message - Message to log.
  - warn
```
void warn(String message,
          Object arg)
```
    Log message with level WARN and with given parameter.
    
    Parameters:
    
    message - Message to log.
    
    arg - Log message parameter.
  - warn
```
void warn(String message,
          Object arg1,
          Object arg2)
```
    Log message with level WARN and with given parameters.
    
    Parameters:
    
    message - Message to log.
    
    arg1 - First log message parameter.
    
    arg2 - Second log message parameter.
  - warn
```
void warn(String message,
          Throwable ex)
```
    Log message with level WARN and log given exception stacktrace.
    
    Parameters:
    
    message - Message to log.
    
    ex - The exception.
  - error
```
void error(String message)
```
    Log message with level ERROR.
    
    Parameters:
    
    message - Message to log.
  - error
```
void error(String message,
           Object arg)
```
    Log message with level ERROR and with given parameter.
    
    Parameters:
    
    message - Message to log.
    
    arg - Log message parameter.
  - error
```
void error(String message,
           Object arg1,
           Object arg2)
```
    Log message with level ERROR and with given parameters.
    
    Parameters:
    
    message - Message to log.
    
    arg1 - First log message parameter.
    
    arg2 - Second log message parameter.
  - error
```
void error(String message,
           Throwable ex)
```
    Log message with level ERROR and log given exception stacktrace.
    
    Parameters:
    
    message - Message to log.
    
    ex - The exception.
  - isTraceEnabled
```
boolean isTraceEnabled()
```
    Check if TRACE is enabled.
    
    Returns:
    
    true if TRACE level is enabled, false otherwise.
  - isDebugEnabled
```
boolean isDebugEnabled()
```
    Check if DEBUG is enabled.
    
    Returns:
    
    true if DEBUG level is enabled, false otherwise.
  - isInfoEnabled
```
boolean isInfoEnabled()
```
    Check if INFO is enabled.
    
    Returns:
    
    true if INFO level is enabled, false otherwise.
  - isWarnEnabled
```
boolean isWarnEnabled()
```
    Check if WARN is enabled.
    
    Returns:
    
    true if WARN level is enabled, false otherwise.
  - isErrorEnabled
```
boolean isErrorEnabled()
```
    Check if ERROR is enabled.
    
    Returns:
    
    true if ERROR level is enabled, false otherwise.

Interface Logger

Method Summary

Method Detail

trace

trace

trace

trace

debug

debug

debug

debug

info

info

info

info

warn

warn

warn

warn

error

error

error

error

isTraceEnabled

isDebugEnabled

isInfoEnabled

isWarnEnabled

isErrorEnabled