All Known Implementing Classes:

StandardOutLogger
```
public interface Logger
```

Method Summary

All Methods Static Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method	Description
`static java.lang.String`	`appendError(java.lang.String message, java.lang.Throwable error)`
`default void`	`debug(java.lang.String message)`	Logs a message with the `DEBUG` level.
`default void`	`debug(java.lang.String message, java.lang.Throwable error)`	Logs a message with the `DEBUG` level.
`default void`	`debug(java.util.function.Supplier<java.lang.String> message)`	Logs a message with the `DEBUG` level.
`default void`	`debug(java.util.function.Supplier<java.lang.String> message, java.lang.Throwable error)`	Logs a message with the `DEBUG` level.
`default void`	`error(java.lang.String message)`	Logs a message with the `ERROR` level.
`default void`	`error(java.lang.String message, java.lang.Throwable error)`	Logs a message with the `ERROR` level.
`default void`	`error(java.util.function.Supplier<java.lang.String> message)`	Logs a message with the `ERROR` level.
`default void`	`error(java.util.function.Supplier<java.lang.String> message, java.lang.Throwable error)`	Logs a message with the `ERROR` level.
`default void`	`info(java.lang.String message)`	Logs a message with the `INFO` level.
`default void`	`info(java.lang.String message, java.lang.Throwable error)`	Logs a message with the `INFO` level.
`default void`	`info(java.util.function.Supplier<java.lang.String> message)`	Logs a message with the `INFO` level.
`default void`	`info(java.util.function.Supplier<java.lang.String> message, java.lang.Throwable error)`	Logs a message with the `INFO` level.
`boolean`	`isDebugEnabled()`	`true` if the logger instance is enabled for the `DEBUG` level.
`boolean`	`isErrorEnabled()`	`true` if the logger instance is enabled for the `ERROR` level.
`boolean`	`isInfoEnabled()`	`true` if the logger instance is enabled for the `INFO` level.
`boolean`	`isTraceEnabled()`	`true` if the logger instance is enabled for the `TRACE` level.
`boolean`	`isWarnEnabled()`	`true` if the logger instance is enabled for the `WARN` level.
`void`	`output(LogLevel level, java.lang.String message)`	Outputs a log message at the specified level
`void`	`output(LogLevel level, java.lang.String message, java.lang.Throwable error)`	Outputs a log message at the specified level
`default void`	`trace(java.lang.String message)`	Logs a message with the `TRACE` level.
`default void`	`trace(java.lang.String message, java.lang.Throwable error)`	Logs a message with the `TRACE` level.
`default void`	`trace(java.util.function.Supplier<java.lang.String> message)`	Logs a message with the `TRACE` level.
`default void`	`trace(java.util.function.Supplier<java.lang.String> message, java.lang.Throwable error)`	Logs a message with the `TRACE` level.
`default void`	`warn(java.lang.String message)`	Logs a message with the `WARN` level.
`default void`	`warn(java.lang.String message, java.lang.Throwable error)`	Logs a message with the `WARN` level.
`default void`	`warn(java.util.function.Supplier<java.lang.String> message)`	Logs a message with the `WARN` level.
`default void`	`warn(java.util.function.Supplier<java.lang.String> message, java.lang.Throwable error)`	Logs a message with the `WARN` level.

- Method Detail
  - isTraceEnabled
```
boolean isTraceEnabled()
```
    `true` if the logger instance is enabled for the `TRACE` level.
    
    Returns:
    
    whether TRACE level is enabled
  - isDebugEnabled
```
boolean isDebugEnabled()
```
    `true` if the logger instance is enabled for the `DEBUG` level.
    
    Returns:
    
    whether DEBUG level is enabled
  - isInfoEnabled
```
boolean isInfoEnabled()
```
    `true` if the logger instance is enabled for the `INFO` level.
    
    Returns:
    
    whether INFO level is enabled
  - isWarnEnabled
```
boolean isWarnEnabled()
```
    `true` if the logger instance is enabled for the `WARN` level.
    
    Returns:
    
    whether WARN level is enabled
  - isErrorEnabled
```
boolean isErrorEnabled()
```
    `true` if the logger instance is enabled for the `ERROR` level.
    
    Returns:
    
    whether ERROR level is enabled
  - trace
```
default void trace(java.lang.String message)
```
    Logs a message with the `TRACE` level.
    
    Parameters:
    
    message - the message to log
  - trace
```
default void trace(java.util.function.Supplier<java.lang.String> message)
```
    Logs a message with the `TRACE` level.
    
    Parameters:
    
    message - the supplier of the message to log
  - trace
```
default void trace(java.lang.String message,
                   java.lang.Throwable error)
```
    Logs a message with the `TRACE` level.
    
    Parameters:
    
    message - the message to log
    
    error - the associated exception
  - trace
```
default void trace(java.util.function.Supplier<java.lang.String> message,
                   java.lang.Throwable error)
```
    Logs a message with the `TRACE` level.
    
    Parameters:
    
    message - the supplier of the message to log
    
    error - the associated exception
  - debug
```
default void debug(java.lang.String message)
```
    Logs a message with the `DEBUG` level.
    
    Parameters:
    
    message - the message to log
  - debug
```
default void debug(java.util.function.Supplier<java.lang.String> message)
```
    Logs a message with the `DEBUG` level.
    
    Parameters:
    
    message - the supplier of the message to log
  - debug
```
default void debug(java.lang.String message,
                   java.lang.Throwable error)
```
    Logs a message with the `DEBUG` level.
    
    Parameters:
    
    message - the message to log
    
    error - the associated exception
  - debug
```
default void debug(java.util.function.Supplier<java.lang.String> message,
                   java.lang.Throwable error)
```
    Logs a message with the `DEBUG` level.
    
    Parameters:
    
    message - the supplier of the message to log
    
    error - the associated exception
  - info
```
default void info(java.lang.String message)
```
    Logs a message with the `INFO` level.
    
    Parameters:
    
    message - the message to log
  - info
```
default void info(java.util.function.Supplier<java.lang.String> message)
```
    Logs a message with the `INFO` level.
    
    Parameters:
    
    message - the supplier of the message to log
  - info
```
default void info(java.lang.String message,
                  java.lang.Throwable error)
```
    Logs a message with the `INFO` level.
    
    Parameters:
    
    message - the message to log
    
    error - the associated exception
  - info
```
default void info(java.util.function.Supplier<java.lang.String> message,
                  java.lang.Throwable error)
```
    Logs a message with the `INFO` level.
    
    Parameters:
    
    message - the supplier of the message to log
    
    error - the associated exception
  - warn
```
default void warn(java.lang.String message)
```
    Logs a message with the `WARN` level.
    
    Parameters:
    
    message - the message to log
  - warn
```
default void warn(java.util.function.Supplier<java.lang.String> message)
```
    Logs a message with the `WARN` level.
    
    Parameters:
    
    message - the supplier of the message to log
  - warn
```
default void warn(java.lang.String message,
                  java.lang.Throwable error)
```
    Logs a message with the `WARN` level.
    
    Parameters:
    
    message - the message to log
    
    error - the associated exception
  - warn
```
default void warn(java.util.function.Supplier<java.lang.String> message,
                  java.lang.Throwable error)
```
    Logs a message with the `WARN` level.
    
    Parameters:
    
    message - the supplier of the message to log
    
    error - the associated exception
  - error
```
default void error(java.lang.String message)
```
    Logs a message with the `ERROR` level.
    
    Parameters:
    
    message - the message to log
  - error
```
default void error(java.util.function.Supplier<java.lang.String> message)
```
    Logs a message with the `ERROR` level.
    
    Parameters:
    
    message - the supplier of the message to log
  - error
```
default void error(java.lang.String message,
                   java.lang.Throwable error)
```
    Logs a message with the `ERROR` level.
    
    Parameters:
    
    message - the message to log
    
    error - the associated exception
  - error
```
default void error(java.util.function.Supplier<java.lang.String> message,
                   java.lang.Throwable error)
```
    Logs a message with the `ERROR` level.
    
    Parameters:
    
    message - the message to log
    
    error - the associated exception
  - output
```
void output(LogLevel level,
            java.lang.String message)
```
    Outputs a log message at the specified level
    
    Parameters:
    
    level - the level to log at
    
    message - the message to log
  - output
```
void output(LogLevel level,
            java.lang.String message,
            java.lang.Throwable error)
```
    Outputs a log message at the specified level
    
    Parameters:
    
    level - the level to log at
    
    message - the message to log
    
    error - the associated exception
  - appendError
```
static java.lang.String appendError(java.lang.String message,
                                    java.lang.Throwable error)
```

Interface Logger

Method Summary

Method Detail

isTraceEnabled

isDebugEnabled

isInfoEnabled

isWarnEnabled

isErrorEnabled

trace

trace

trace

trace

debug

debug

debug

debug

info

info

info

info

warn

warn

warn

warn

error

error

error

error

output

output

appendError