ILcdLogger (LuciadFusion API documentation)

```
public interface ILcdLogger
```
Logging interface for LuciadLightspeed. It acts as a wrapper around a concrete logging framework implementation.
You typically don't need to use ILcdLogger directly. Instead, you can use the logging framework of your choice and make sure LuciadLightspeed connects to it by configuring an ILcdLoggerFactory, as illustrated in this tutorial.
Sorted in ascending order of importance, the log levels are:
- trace
- debug
- info
- warn
- error
The methods which take a Supplier<String> as argument can be used to simplify statements like:
```
   //String concatenation only happens when the message will be logged
   //thanks to the if check
   if (logger.isDebugEnabled()){
     logger.debug( "A message with " + "expensive String concatenation");
   }
 
```
to
```
   //String concatenation will still only happen when the message will be logged,
   //but the if check can be avoided
   logger.debug( () -> "A message with " + "expensive String concatenation");
 
```
Since:

9.0

See Also:

ILcdLoggerFactory

Method Summary

All Methods Instance Methods Abstract Methods Default Methods
Modifier and Type	Method and Description
`void`	`debug(String aMessage)` Records a debug message.
`default void`	`debug(String aMessage, Object... aParameters)` Records a debug message and the associated parameters.
`void`	`debug(String aMessage, Object aParameter)` Records a debug message and an associated parameter object.
`void`	`debug(String aMessage, Object aParameter, Throwable aThrowable)` Records a debug message, an associated parameter and a `Throwable` object.
`void`	`debug(String aMessage, Throwable aThrowable)` Records a debug message and a `Throwable` object.
`default void`	`debug(String aMessage, Throwable aThrowable, Object... aParameters)` Records a debug message, the associated parameters and a `Throwable` object.
`default void`	`debug(Supplier<String> aMessageSupplier)` Records a debug message supplier, which is only evaluated when debug messages are enabled.
`default void`	`debug(Supplier<String> aMessageSupplier, Throwable aThrowable)` Records a `Throwable` object and a debug message supplier, which is only evaluated when debug messages are enabled.
`void`	`error(String aMessage)` Records an error message.
`default void`	`error(String aMessage, Object... aParameters)` Records an error message and the associated parameters.
`void`	`error(String aMessage, Object aParameter)` Records an error message and an associated parameter object.
`void`	`error(String aMessage, Object aParameter, Throwable aThrowable)` Records an error message, an associated parameter and a `Throwable` object.
`void`	`error(String aMessage, Throwable aThrowable)` Records an error message and a `Throwable` object.
`default void`	`error(String aMessage, Throwable aThrowable, Object... aParameters)` Records an error message, the associated parameters and a `Throwable` object.
`default void`	`error(Supplier<String> aMessageSupplier)` Records an error message supplier, which is only evaluated when error messages are enabled.
`default void`	`error(Supplier<String> aMessageSupplier, Throwable aThrowable)` Records a `Throwable` object and an error message supplier, which is only evaluated when error messages are enabled.
`void`	`info(String aMessage)` Records an informational message.
`default void`	`info(String aMessage, Object... aParameters)` Records an informational message and the associated parameters.
`void`	`info(String aMessage, Object aParameter)` Records an informational message and an associated parameter object.
`void`	`info(String aMessage, Object aParameter, Throwable aThrowable)` Records an informational message, an associated parameter and a `Throwable` object.
`void`	`info(String aMessage, Throwable aThrowable)` Records an informational message and a `Throwable` object.
`default void`	`info(String aMessage, Throwable aThrowable, Object... aParameters)` Records an informational message, the associated parameters and a `Throwable` object.
`default void`	`info(Supplier<String> aMessageSupplier)` Records an info message supplier, which is only evaluated when info messages are enabled.
`default void`	`info(Supplier<String> aMessageSupplier, Throwable aThrowable)` Records a `Throwable` object and an info message supplier, which is only evaluated when info messages are enabled.
`boolean`	`isDebugEnabled()` Returns true if debug messages are logged.
`boolean`	`isErrorEnabled()` Returns true if error messages are logged.
`boolean`	`isInfoEnabled()` Returns true if informational messages are logged.
`boolean`	`isTraceEnabled()` Returns true if trace messages are logged.
`boolean`	`isWarnEnabled()` Returns true if warning messages are logged.
`void`	`trace(String aMessage)` Records a trace message.
`default void`	`trace(String aMessage, Object... aParameters)` Records a trace message and the associated parameters.
`void`	`trace(String aMessage, Object aParameter)` Records a trace message and an associated parameter object.
`void`	`trace(String aMessage, Object aParameter, Throwable aThrowable)` Records a trace message, an associated parameter and a `Throwable` object.
`void`	`trace(String aMessage, Throwable aThrowable)` Records a trace message and a `Throwable` object.
`default void`	`trace(String aMessage, Throwable aThrowable, Object... aParameters)` Records a trace message, the associated parameters and a `Throwable` object.
`default void`	`trace(Supplier<String> aMessageSupplier)` Records a trace message supplier, which is only evaluated when trace messages are enabled.
`default void`	`trace(Supplier<String> aMessageSupplier, Throwable aThrowable)` Records a `Throwable` object and a trace message supplier, which is only evaluated when trace messages are enabled.
`void`	`warn(String aMessage)` Records a warning message.
`default void`	`warn(String aMessage, Object... aParameters)` Records a warning message and the associated parameters.
`void`	`warn(String aMessage, Object aParameter)` Records a warning message and an associated parameter object.
`void`	`warn(String aMessage, Object aParameter, Throwable aThrowable)` Records a warning message, an associated parameter and a `Throwable` object.
`void`	`warn(String aMessage, Throwable aThrowable)` Records a warning message and a `Throwable` object.
`default void`	`warn(String aMessage, Throwable aThrowable, Object... aParameters)` Records a warning message, the associated parameters and a `Throwable` object.
`default void`	`warn(Supplier<String> aMessageSupplier)` Records a warning message supplier, which is only evaluated when warning messages are enabled.
`default void`	`warn(Supplier<String> aMessageSupplier, Throwable aThrowable)` Records a `Throwable` object and a warning message supplier, which is only evaluated when warning messages are enabled.

- Method Detail
  - isTraceEnabled
```
boolean isTraceEnabled()
```
    Returns true if trace messages are logged.
    
    Returns:
    
    true if trace messages are logged, false otherwise.
  - trace
```
default void trace(Supplier<String> aMessageSupplier)
```
    Records a trace message supplier, which is only evaluated when trace messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log message
    
    Since:
    
    2017.0
  - trace
```
void trace(String aMessage)
```
    Records a trace message.
    
    Parameters:
    
    aMessage - the formatted message.
  - trace
```
default void trace(Supplier<String> aMessageSupplier,
                   Throwable aThrowable)
```
    Records a Throwable object and a trace message supplier, which is only evaluated when trace messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log formatted message.
    
    aThrowable - the Throwable object.
    
    Since:
    
    2017.0
  - trace
```
void trace(String aMessage,
           Throwable aThrowable)
```
    Records a trace message and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aThrowable - the Throwable object.
  - trace
```
void trace(String aMessage,
           Object aParameter)
```
    Records a trace message and an associated parameter object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - a parameter referenced by the message
  - trace
```
default void trace(String aMessage,
                   Object... aParameters)
```
    Records a trace message and the associated parameters.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameters - the parameters referenced by the message
    
    Since:
    
    2019.1
  - trace
```
void trace(String aMessage,
           Object aParameter,
           Throwable aThrowable)
```
    Records a trace message, an associated parameter and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - the associated parameter.
    
    aThrowable - the associated Throwable.
  - trace
```
default void trace(String aMessage,
                   Throwable aThrowable,
                   Object... aParameters)
```
    Records a trace message, the associated parameters and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aThrowable - the associated Throwable.
    
    aParameters - the associated parameters.
    
    Since:
    
    2019.1
  - isDebugEnabled
```
boolean isDebugEnabled()
```
    Returns true if debug messages are logged.
    
    Returns:
    
    true if debug messages are logged, false otherwise.
  - debug
```
default void debug(Supplier<String> aMessageSupplier)
```
    Records a debug message supplier, which is only evaluated when debug messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log message
    
    Since:
    
    2017.0
  - debug
```
void debug(String aMessage)
```
    Records a debug message.
    
    Parameters:
    
    aMessage - the formatted message.
  - debug
```
default void debug(Supplier<String> aMessageSupplier,
                   Throwable aThrowable)
```
    Records a Throwable object and a debug message supplier, which is only evaluated when debug messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log formatted message.
    
    aThrowable - the Throwable object.
    
    Since:
    
    2017.0
  - debug
```
void debug(String aMessage,
           Throwable aThrowable)
```
    Records a debug message and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aThrowable - the Throwable object.
  - debug
```
void debug(String aMessage,
           Object aParameter)
```
    Records a debug message and an associated parameter object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - a parameter referenced by the message
  - debug
```
default void debug(String aMessage,
                   Object... aParameters)
```
    Records a debug message and the associated parameters.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameters - the parameters referenced by the message
    
    Since:
    
    2019.1
  - debug
```
void debug(String aMessage,
           Object aParameter,
           Throwable aThrowable)
```
    Records a debug message, an associated parameter and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - a parameter referenced by the message
    
    aThrowable - the associated Throwable.
  - debug
```
default void debug(String aMessage,
                   Throwable aThrowable,
                   Object... aParameters)
```
    Records a debug message, the associated parameters and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aThrowable - the associated Throwable.
    
    aParameters - the parameters referenced by the message
    
    Since:
    
    2019.1
  - isInfoEnabled
```
boolean isInfoEnabled()
```
    Returns true if informational messages are logged.
    
    Returns:
    
    true if informational messages are logged, false otherwise.
  - info
```
default void info(Supplier<String> aMessageSupplier)
```
    Records an info message supplier, which is only evaluated when info messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log message
    
    Since:
    
    2017.0
  - info
```
void info(String aMessage)
```
    Records an informational message.
    
    Parameters:
    
    aMessage - the informational message.
  - info
```
default void info(Supplier<String> aMessageSupplier,
                  Throwable aThrowable)
```
    Records a Throwable object and an info message supplier, which is only evaluated when info messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log formatted message.
    
    aThrowable - the Throwable object.
    
    Since:
    
    2017.0
  - info
```
void info(String aMessage,
          Throwable aThrowable)
```
    Records an informational message and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aThrowable - the Throwable object.
  - info
```
void info(String aMessage,
          Object aParameter)
```
    Records an informational message and an associated parameter object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - a parameter that can be referenced by the message
  - info
```
default void info(String aMessage,
                  Object... aParameters)
```
    Records an informational message and the associated parameters.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameters - the parameters that can be referenced by the message
    
    Since:
    
    2019.1
  - info
```
void info(String aMessage,
          Object aParameter,
          Throwable aThrowable)
```
    Records an informational message, an associated parameter and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - a parameter that can be referenced by the message
    
    aThrowable - the associated Throwable.
  - info
```
default void info(String aMessage,
                  Throwable aThrowable,
                  Object... aParameters)
```
    Records an informational message, the associated parameters and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aThrowable - the associated Throwable.
    
    aParameters - the parameters that can be referenced by the message
    
    Since:
    
    2019.1
  - isWarnEnabled
```
boolean isWarnEnabled()
```
    Returns true if warning messages are logged.
    
    Returns:
    
    true if warning messages are logged, false otherwise.
  - warn
```
default void warn(Supplier<String> aMessageSupplier)
```
    Records a warning message supplier, which is only evaluated when warning messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log message
    
    Since:
    
    2017.0
  - warn
```
void warn(String aMessage)
```
    Records a warning message.
    
    Parameters:
    
    aMessage - the formatted message.
  - warn
```
default void warn(Supplier<String> aMessageSupplier,
                  Throwable aThrowable)
```
    Records a Throwable object and a warning message supplier, which is only evaluated when warning messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log formatted message.
    
    aThrowable - the Throwable object.
    
    Since:
    
    2017.0
  - warn
```
void warn(String aMessage,
          Throwable aThrowable)
```
    Records a warning message and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aThrowable - the Throwable object.
  - warn
```
void warn(String aMessage,
          Object aParameter)
```
    Records a warning message and an associated parameter object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - a parameter that can be referenced by the message
  - warn
```
default void warn(String aMessage,
                  Object... aParameters)
```
    Records a warning message and the associated parameters.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameters - the parameters that can be referenced by the message
    
    Since:
    
    2019.1
  - warn
```
void warn(String aMessage,
          Object aParameter,
          Throwable aThrowable)
```
    Records a warning message, an associated parameter and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - a parameter that can be referenced by the message
    
    aThrowable - the associated Throwable.
  - warn
```
default void warn(String aMessage,
                  Throwable aThrowable,
                  Object... aParameters)
```
    Records a warning message, the associated parameters and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aThrowable - the associated Throwable.
    
    aParameters - the parameters that can be referenced by the message
    
    Since:
    
    2019.1
  - isErrorEnabled
```
boolean isErrorEnabled()
```
    Returns true if error messages are logged.
    
    Returns:
    
    true if error messages are logged, false otherwise.
  - error
```
default void error(Supplier<String> aMessageSupplier)
```
    Records an error message supplier, which is only evaluated when error messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log message
    
    Since:
    
    2017.0
  - error
```
void error(String aMessage)
```
    Records an error message.
    
    Parameters:
    
    aMessage - the formatted message.
  - error
```
default void error(Supplier<String> aMessageSupplier,
                   Throwable aThrowable)
```
    Records a Throwable object and an error message supplier, which is only evaluated when error messages are enabled. This method can be used to remove the overhead of generating a message (for example String concatenation) when messages will not actually be logged.
    
    Parameters:
    
    aMessageSupplier - A function, which when called, produces the desired log formatted message.
    
    aThrowable - the Throwable object.
    
    Since:
    
    2017.0
  - error
```
void error(String aMessage,
           Throwable aThrowable)
```
    Records an error message and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aThrowable - the Throwable object.
  - error
```
void error(String aMessage,
           Object aParameter)
```
    Records an error message and an associated parameter object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - a parameter that can be referenced by the message
  - error
```
default void error(String aMessage,
                   Object... aParameters)
```
    Records an error message and the associated parameters.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameters - the parameters that can be referenced by the message
    
    Since:
    
    2019.1
  - error
```
void error(String aMessage,
           Object aParameter,
           Throwable aThrowable)
```
    Records an error message, an associated parameter and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameter - a parameter that can be referenced by the message
    
    aThrowable - the associated Throwable.
  - error
```
default void error(String aMessage,
                   Throwable aThrowable,
                   Object... aParameters)
```
    Records an error message, the associated parameters and a Throwable object.
    
    Parameters:
    
    aMessage - the formatted message.
    
    aParameters - the parameters that can be referenced by the message
    
    aThrowable - the associated Throwable.
    
    Since:
    
    2019.1

LuciadFusionInterface ILcdLogger

Method Summary

Method Detail

isTraceEnabled

trace

trace

trace

trace

trace

trace

trace

trace

isDebugEnabled

debug

debug

debug

debug

debug

debug

debug

debug

isInfoEnabled

info

info

info

info

info

info

info

info

isWarnEnabled

warn

warn

warn

warn

warn

warn

warn

warn

isErrorEnabled

error

error

error

error

error

error

error

error