Logger (reactor-core 3.4.30)

```
public interface Logger
```
Logger interface designed for internal Reactor usage.

Nested Class Summary

Nested Classes
Modifier and Type	Interface and Description
`static interface`	`Logger.ChoiceOfMessageSupplier` A kind of `Predicate` and `Supplier` mix, provides two variants of a message `String` depending on the level of detail desired.

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`void`	`debug(String msg)` Log a message at the DEBUG level.
`void`	`debug(String format, Object... arguments)` Log a message at the DEBUG level according to the specified format and arguments.
`void`	`debug(String msg, Throwable t)` Log an exception (throwable) at the DEBUG level with an accompanying message.
`void`	`error(String msg)` Log a message at the ERROR level.
`void`	`error(String format, Object... arguments)` Log a message at the ERROR level according to the specified format and arguments.
`void`	`error(String msg, Throwable t)` Log an exception (throwable) at the ERROR level with an accompanying message.
`default void`	`errorOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier)` Convenience method to log a message that is different according to the log level.
`default void`	`errorOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier, Throwable cause)` Convenience method to log an exception (throwable), with an accompanying message that is different according to the log level.
`String`	`getName()` Return the name of this `Logger` instance.
`void`	`info(String msg)` Log a message at the INFO level.
`void`	`info(String format, Object... arguments)` Log a message at the INFO level according to the specified format and arguments.
`void`	`info(String msg, Throwable t)` Log an exception (throwable) at the INFO level with an accompanying message.
`default void`	`infoOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier)` Convenience method to log a message that is different according to the log level.
`default void`	`infoOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier, Throwable cause)` Convenience method to log an exception (throwable), with an accompanying message that is different according to the log level.
`boolean`	`isDebugEnabled()` Is the logger instance enabled for the DEBUG level?
`boolean`	`isErrorEnabled()` Is the logger instance enabled for the ERROR level?
`boolean`	`isInfoEnabled()` Is the logger instance enabled for the INFO level?
`boolean`	`isTraceEnabled()` Is the logger instance enabled for the TRACE level?
`boolean`	`isWarnEnabled()` Is the logger instance enabled for the WARN level?
`void`	`trace(String msg)` Log a message at the TRACE level.
`void`	`trace(String format, Object... arguments)` Log a message at the TRACE level according to the specified format and arguments.
`void`	`trace(String msg, Throwable t)` Log an exception (throwable) at the TRACE level with an accompanying message.
`void`	`warn(String msg)` Log a message at the WARN level.
`void`	`warn(String format, Object... arguments)` Log a message at the WARN level according to the specified format and arguments.
`void`	`warn(String msg, Throwable t)` Log an exception (throwable) at the WARN level with an accompanying message.
`default void`	`warnOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier)` Convenience method to log a message that is different according to the log level.
`default void`	`warnOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier, Throwable cause)` Convenience method to log an exception (throwable), with an accompanying message that is different according to the log level.

- Method Detail
  - getName
```
String getName()
```
    Return the name of this Logger instance.
    
    Returns:
    
    name of this logger instance
  - isTraceEnabled
```
boolean isTraceEnabled()
```
    Is the logger instance enabled for the TRACE level?
    
    Returns:
    
    True if this Logger is enabled for the TRACE level, false otherwise.
  - trace
```
void trace(String msg)
```
    Log a message at the TRACE level.
    
    Parameters:
    
    msg - the message string to be logged
  - trace
```
void trace(String format,
           Object... arguments)
```
    Log a message at the TRACE level according to the specified format and arguments.
    
    This form avoids superfluous string concatenation when the logger is disabled for the TRACE level. However, this variant incurs the hidden (and relatively small) cost of creating an Object[] before invoking the method, even if this logger is disabled for TRACE.
    
    Parameters:
    
    format - the format string
    
    arguments - a list of 3 or more arguments
  - trace
```
void trace(String msg,
           Throwable t)
```
    Log an exception (throwable) at the TRACE level with an accompanying message.
    
    Parameters:
    
    msg - the message accompanying the exception
    
    t - the exception (throwable) to log
  - isDebugEnabled
```
boolean isDebugEnabled()
```
    Is the logger instance enabled for the DEBUG level?
    
    Returns:
    
    True if this Logger is enabled for the DEBUG level, false otherwise.
  - debug
```
void debug(String msg)
```
    Log a message at the DEBUG level.
    
    Parameters:
    
    msg - the message string to be logged
  - debug
```
void debug(String format,
           Object... arguments)
```
    Log a message at the DEBUG level according to the specified format and arguments.
    
    This form avoids superfluous string concatenation when the logger is disabled for the DEBUG level. However, this variant incurs the hidden (and relatively small) cost of creating an Object[] before invoking the method, even if this logger is disabled for DEBUG.
    
    Parameters:
    
    format - the format string
    
    arguments - a list of 3 or more arguments
  - debug
```
void debug(String msg,
           Throwable t)
```
    Log an exception (throwable) at the DEBUG level with an accompanying message.
    
    Parameters:
    
    msg - the message accompanying the exception
    
    t - the exception (throwable) to log
  - isInfoEnabled
```
boolean isInfoEnabled()
```
    Is the logger instance enabled for the INFO level?
    
    Returns:
    
    True if this Logger is enabled for the INFO level, false otherwise.
  - info
```
void info(String msg)
```
    Log a message at the INFO level.
    
    Parameters:
    
    msg - the message string to be logged
  - info
```
void info(String format,
          Object... arguments)
```
    Log a message at the INFO level according to the specified format and arguments.
    
    This form avoids superfluous string concatenation when the logger is disabled for the INFO level. However, this variant incurs the hidden (and relatively small) cost of creating an Object[] before invoking the method, even if this logger is disabled for INFO.
    
    Parameters:
    
    format - the format string
    
    arguments - a list of 3 or more arguments
  - info
```
void info(String msg,
          Throwable t)
```
    Log an exception (throwable) at the INFO level with an accompanying message.
    
    Parameters:
    
    msg - the message accompanying the exception
    
    t - the exception (throwable) to log
  - infoOrDebug
```
default void infoOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier)
```
    Convenience method to log a message that is different according to the log level. In priority, DEBUG level is used if isDebugEnabled(). Otherwise, INFO level is used (unless isInfoEnabled() is false).
    This can be used to log different level of details according to the active log level.
    
    Parameters:
    
    messageSupplier - the Logger.ChoiceOfMessageSupplier invoked in priority with true for the DEBUG level message, or false for INFO level
    
    See Also:
    
    info(String)
  - infoOrDebug
```
default void infoOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier,
                         Throwable cause)
```
    Convenience method to log an exception (throwable), with an accompanying message that is different according to the log level. In priority, DEBUG level is used if isDebugEnabled(). Otherwise, INFO level is used (unless isInfoEnabled() is false).
    This can be used to log different level of details according to the active log level.
    
    Parameters:
    
    messageSupplier - the Logger.ChoiceOfMessageSupplier invoked in priority with true for the DEBUG level message, or false for INFO level
    
    cause - the Throwable the original exception to be logged
    
    See Also:
    
    info(String, Throwable)
  - isWarnEnabled
```
boolean isWarnEnabled()
```
    Is the logger instance enabled for the WARN level?
    
    Returns:
    
    True if this Logger is enabled for the WARN level, false otherwise.
  - warn
```
void warn(String msg)
```
    Log a message at the WARN level.
    
    Parameters:
    
    msg - the message string to be logged
  - warn
```
void warn(String format,
          Object... arguments)
```
    Log a message at the WARN level according to the specified format and arguments.
    
    This form avoids superfluous string concatenation when the logger is disabled for the WARN level. However, this variant incurs the hidden (and relatively small) cost of creating an Object[] before invoking the method, even if this logger is disabled for WARN.
    
    Parameters:
    
    format - the format string
    
    arguments - a list of 3 or more arguments
  - warn
```
void warn(String msg,
          Throwable t)
```
    Log an exception (throwable) at the WARN level with an accompanying message.
    
    Parameters:
    
    msg - the message accompanying the exception
    
    t - the exception (throwable) to log
  - warnOrDebug
```
default void warnOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier)
```
    Convenience method to log a message that is different according to the log level. In priority, DEBUG level is used if isDebugEnabled(). Otherwise, WARN level is used (unless isWarnEnabled() is false).
    This can be used to log different level of details according to the active log level.
    
    Parameters:
    
    messageSupplier - the Logger.ChoiceOfMessageSupplier invoked in priority with true for the DEBUG level message, or false for WARN level
    
    See Also:
    
    warn(String)
  - warnOrDebug
```
default void warnOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier,
                         Throwable cause)
```
    Convenience method to log an exception (throwable), with an accompanying message that is different according to the log level. In priority, DEBUG level is used if isDebugEnabled(). Otherwise, WARN level is used (unless isWarnEnabled() is false).
    This can be used to log different level of details according to the active log level.
    
    Parameters:
    
    messageSupplier - the Logger.ChoiceOfMessageSupplier invoked in priority with true for the DEBUG level message, or false for WARN level
    
    cause - the Throwable the original exception to be logged
    
    See Also:
    
    warn(String, Throwable)
  - isErrorEnabled
```
boolean isErrorEnabled()
```
    Is the logger instance enabled for the ERROR level?
    
    Returns:
    
    True if this Logger is enabled for the ERROR level, false otherwise.
  - error
```
void error(String msg)
```
    Log a message at the ERROR level.
    
    Parameters:
    
    msg - the message string to be logged
  - error
```
void error(String format,
           Object... arguments)
```
    Log a message at the ERROR level according to the specified format and arguments.
    
    This form avoids superfluous string concatenation when the logger is disabled for the ERROR level. However, this variant incurs the hidden (and relatively small) cost of creating an Object[] before invoking the method, even if this logger is disabled for ERROR.
    
    Parameters:
    
    format - the format string
    
    arguments - a list of 3 or more arguments
  - error
```
void error(String msg,
           Throwable t)
```
    Log an exception (throwable) at the ERROR level with an accompanying message.
    
    Parameters:
    
    msg - the message accompanying the exception
    
    t - the exception (throwable) to log
  - errorOrDebug
```
default void errorOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier)
```
    Convenience method to log a message that is different according to the log level. In priority, DEBUG level is used if isDebugEnabled(). Otherwise, ERROR level is used (unless isErrorEnabled() is false).
    This can be used to log different level of details according to the active log level.
    
    Parameters:
    
    messageSupplier - the Logger.ChoiceOfMessageSupplier invoked in priority with true for the DEBUG level message, or false for ERROR level
    
    See Also:
    
    error(String)
  - errorOrDebug
```
default void errorOrDebug(Logger.ChoiceOfMessageSupplier messageSupplier,
                          Throwable cause)
```
    Convenience method to log an exception (throwable), with an accompanying message that is different according to the log level. In priority, DEBUG level is used if isDebugEnabled(). Otherwise, ERROR level is used (unless isErrorEnabled() is false).
    This can be used to log different level of details according to the active log level.
    
    Parameters:
    
    messageSupplier - the Logger.ChoiceOfMessageSupplier invoked in priority with true for the DEBUG level message, or false for ERROR level
    
    cause - the Throwable the original exception to be logged
    
    See Also:
    
    error(String, Throwable)

Interface Logger

Nested Class Summary

Method Summary

Method Detail

getName

isTraceEnabled

trace

trace

trace

isDebugEnabled

debug

debug

debug

isInfoEnabled

info

info

info

infoOrDebug

infoOrDebug

isWarnEnabled

warn

warn

warn

warnOrDebug

warnOrDebug

isErrorEnabled

error

error

error

errorOrDebug

errorOrDebug