Appenders are attached to Loggers and manage the output of the LogEvents to a destination - such as the console or a text file. An Appender has a single Layout that tells it how to format the LogEvent. For details please refer to the documentations of the specific Appenders.

Additional Appenders that support a wide range of output destinations - such as databases, email, push-notifications or Linux syslog - are available from the package lgrExtra.

NOTE: This is an abstract class. Abstract classes cannot be instantiated directly, but are exported for package developers that want to extend lgr - for example by creating their own Appenders or Layouts. Please refer to the see also section for actual implementations of this class.

See also

Super class

lgr::Filterable -> Appender

Active bindings

destination

The output destination of the Appender in human-readable form. This is mainly used when printing information about the Appender itself.

Methods

Public methods

Inherited methods

Method new()

Usage

Appender$new(layout = Layout$new(), threshold = NA_integer_)


Method append()

Process a LogEvent event. This method is usually not called by the user, but invoked by a Logger

Usage

Appender$append(event)


Method set_threshold()

Set the minimum log level that triggers this Appender. See threshold() for examples

Usage

Appender$set_threshold(level)

Arguments

level

character or integer scalar log level. See log_levels.


Method set_layout()

Set the Layout that this Appender will use for formatting LogEvents

Usage

Appender$set_layout(layout)


Method format()

Usage

Appender$format(color = FALSE, ...)