Logger (Logging Interface API 1.3 API)

All Known Implementing Classes:

NullLogger
```
public interface Logger
```
The main Logger interface.

Author:

Peter Wall

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`void`	`debug(Object message)` Output a debug message.
`default void`	`debug(Supplier<Object> messageSupplier)` Output a debug message supplied by a `Supplier` function.
`void`	`error(Object message)` Output an error message.
`default void`	`error(Supplier<Object> messageSupplier)` Output an error message supplied by a `Supplier` function.
`void`	`error(Throwable throwable, Object message)` Output an error message along with a `Throwable`.
`default void`	`error(Throwable throwable, Supplier<Object> messageSupplier)` Output an error message supplied by a `Supplier` function, along with a `Throwable`.
`default Clock`	`getClock()` Get the `Clock` used by this `Logger` (the default implementation returns the system clock).
`default Level`	`getLevel()` Get the minimum level to be output by this `Logger` (the default implementation returns `INFO`).
`String`	`getName()` Get the name associated with this `Logger`.
`void`	`info(Object message)` Output an info message.
`default void`	`info(Supplier<Object> messageSupplier)` Output an info message supplied by a `Supplier` function.
`default boolean`	`isDebugEnabled()` Test whether debug output is enabled for this `Logger`.
`default boolean`	`isEnabled(Level level)` Test whether the specified level is enabled for this `Logger`.
`default boolean`	`isErrorEnabled()` Test whether error output is enabled for this `Logger`.
`default boolean`	`isInfoEnabled()` Test whether info output is enabled for this `Logger`.
`default boolean`	`isTraceEnabled()` Test whether trace output is enabled for this `Logger`.
`default boolean`	`isWarnEnabled()` Test whether warning output is enabled for this `Logger`.
`default void`	`log(Level level, Object message)` Output a message with a variable level.
`default void`	`log(Level level, Supplier<Object> messageSupplier)` Output a message supplied by a `Supplier` function, with a variable level.
`default void`	`setClock(Clock clock)` Set the `Clock` used by this `Logger` (the default implementation does nothing).
`default void`	`setLevel(Level level)` Set the minimum level to be output by this `Logger` (the default implementation does nothing).
`void`	`trace(Object message)` Output a trace message.
`default void`	`trace(Supplier<Object> messageSupplier)` Output a trace message supplied by a `Supplier` function.
`void`	`warn(Object message)` Output a warning message.
`default void`	`warn(Supplier<Object> messageSupplier)` Output a warning message supplied by a `Supplier` function.

- Method Detail
  - getName
```
String getName()
```
    Get the name associated with this Logger. This is often (but not always) the fully-qualified class name of the class with which this Logger is associated.
    
    Returns:
    
    the name
  - getLevel
```
default Level getLevel()
```
    Get the minimum level to be output by this Logger (the default implementation returns INFO).
    
    Returns:
    
    the Level
  - setLevel
```
default void setLevel(Level level)
```
    Set the minimum level to be output by this Logger (the default implementation does nothing).
    
    Parameters:
    
    level - the new Level
  - getClock
```
default Clock getClock()
```
    Get the Clock used by this Logger (the default implementation returns the system clock).
    
    Returns:
    
    the Clock
  - setClock
```
default void setClock(Clock clock)
```
    Set the Clock used by this Logger (the default implementation does nothing).
    
    Parameters:
    
    clock - the new Clock
  - trace
```
void trace(Object message)
```
    Output a trace message.
    
    Parameters:
    
    message - the message
  - debug
```
void debug(Object message)
```
    Output a debug message.
    
    Parameters:
    
    message - the message
  - info
```
void info(Object message)
```
    Output an info message.
    
    Parameters:
    
    message - the message
  - warn
```
void warn(Object message)
```
    Output a warning message.
    
    Parameters:
    
    message - the message
  - error
```
void error(Object message)
```
    Output an error message.
    
    Parameters:
    
    message - the message
  - error
```
void error(Throwable throwable,
           Object message)
```
    Output an error message along with a Throwable.
    
    Parameters:
    
    throwable - the Throwable
    
    message - the message
  - isTraceEnabled
```
default boolean isTraceEnabled()
```
    Test whether trace output is enabled for this Logger.
    
    Returns:
    
    true if trace output is enabled
  - isDebugEnabled
```
default boolean isDebugEnabled()
```
    Test whether debug output is enabled for this Logger.
    
    Returns:
    
    true if debug output is enabled
  - isInfoEnabled
```
default boolean isInfoEnabled()
```
    Test whether info output is enabled for this Logger.
    
    Returns:
    
    true if info output is enabled
  - isWarnEnabled
```
default boolean isWarnEnabled()
```
    Test whether warning output is enabled for this Logger.
    
    Returns:
    
    true if warning output is enabled
  - isErrorEnabled
```
default boolean isErrorEnabled()
```
    Test whether error output is enabled for this Logger.
    
    Returns:
    
    true if error output is enabled
  - isEnabled
```
default boolean isEnabled(Level level)
```
    Test whether the specified level is enabled for this Logger.
    
    Parameters:
    
    level - the Level
    
    Returns:
    
    true if output of the specified level is enabled
  - trace
```
default void trace(Supplier<Object> messageSupplier)
```
    Output a trace message supplied by a Supplier function. The function will only be called if the logging level is enabled.
    
    Parameters:
    
    messageSupplier - the message supplier
  - debug
```
default void debug(Supplier<Object> messageSupplier)
```
    Output a debug message supplied by a Supplier function. The function will only be called if the logging level is enabled.
    
    Parameters:
    
    messageSupplier - the message supplier
  - info
```
default void info(Supplier<Object> messageSupplier)
```
    Output an info message supplied by a Supplier function. The function will only be called if the logging level is enabled.
    
    Parameters:
    
    messageSupplier - the message supplier
  - warn
```
default void warn(Supplier<Object> messageSupplier)
```
    Output a warning message supplied by a Supplier function. The function will only be called if the logging level is enabled.
    
    Parameters:
    
    messageSupplier - the message supplier
  - error
```
default void error(Supplier<Object> messageSupplier)
```
    Output an error message supplied by a Supplier function. The function will only be called if the logging level is enabled.
    
    Parameters:
    
    messageSupplier - the message supplier
  - error
```
default void error(Throwable throwable,
                   Supplier<Object> messageSupplier)
```
    Output an error message supplied by a Supplier function, along with a Throwable. The function will only be called if the logging level is enabled.
    
    Parameters:
    
    messageSupplier - the message supplier
    
    throwable - the Throwable
  - log
```
default void log(Level level,
                 Object message)
```
    Output a message with a variable level.
    
    Parameters:
    
    level - the Level
    
    message - the message (will be output using toString()
  - log
```
default void log(Level level,
                 Supplier<Object> messageSupplier)
```
    Output a message supplied by a Supplier function, with a variable level. The function will only be called if the logging level is enabled.
    
    Parameters:
    
    level - the Level
    
    messageSupplier - the message supplier

Interface Logger

Method Summary

Method Detail

getName

getLevel

setLevel

getClock

setClock

trace

debug

info

warn

error

error

isTraceEnabled

isDebugEnabled

isInfoEnabled

isWarnEnabled

isErrorEnabled

isEnabled

trace

debug

info

warn

error

error

log

log