Logger

All Known Implementing Classes:

NullLogger, Slf4jLoggerFactory.Slf4jLogger, Slf4jLoggerFactory.Slf4jLoggerEx, TestLoggerFactory.TestLogger
```
public interface Logger
```
A simple logger to facilitate emission of diagnostic messages. In general, unrecoverable errors should be reported via exceptions and informational notifications should be reported via events, hence this logger interface focuses on support for tracing.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`debug(java.lang.String msg)`	Emits the specified message.
`void`	`debug(java.lang.String msg, java.lang.Throwable error)`	Emits the specified message along with a stack trace of the given exception.
`boolean`	`isDebugEnabled()`	Indicates whether debug logging is enabled.
`boolean`	`isWarnEnabled()`	Indicates whether warn logging is enabled.
`void`	`warn(java.lang.String msg)`	Emits the specified message.
`void`	`warn(java.lang.String msg, java.lang.Throwable error)`	Emits the specified message along with a stack trace of the given exception.

- Method Detail
  - isDebugEnabled
```
boolean isDebugEnabled()
```
    Indicates whether debug logging is enabled.
    
    Returns:
    
    true if debug logging is enabled, false otherwise.
  - debug
```
void debug(java.lang.String msg)
```
    Emits the specified message.
    
    Parameters:
    
    msg - The message to log, must not be null.
  - debug
```
void debug(java.lang.String msg,
           java.lang.Throwable error)
```
    Emits the specified message along with a stack trace of the given exception.
    
    Parameters:
    
    msg - The message to log, must not be null.
    
    error - The exception to log, may be null.
  - isWarnEnabled
```
boolean isWarnEnabled()
```
    Indicates whether warn logging is enabled.
    
    Returns:
    
    true if warn logging is enabled, false otherwise.
  - warn
```
void warn(java.lang.String msg)
```
    Emits the specified message.
    
    Parameters:
    
    msg - The message to log, must not be null.
  - warn
```
void warn(java.lang.String msg,
          java.lang.Throwable error)
```
    Emits the specified message along with a stack trace of the given exception.
    
    Parameters:
    
    msg - The message to log, must not be null.
    
    error - The exception to log, may be null.