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.
lgr::Filterable -> Appender
destinationThe output destination of the Appender in human-readable form. This
is mainly used when printing information about the Appender itself.
new()Appender$new(layout = Layout$new(), threshold = NA_integer_)
append()Process a LogEvent event. This method is usually not
called by the user, but invoked by a Logger
Appender$append(event)
set_threshold()Set the minimum log level that triggers this Appender. See
threshold() for examples
Appender$set_threshold(level)levelcharacter or integer scalar log level. See log_levels.
set_layout()Set the Layout that this Appender will use for formatting
LogEvents
Appender$set_layout(layout)
format()Appender$format(color = FALSE, ...)
Other abstract classes:
AppenderMemory,
AppenderTable,
Filterable
Other Appenders:
AppenderBuffer,
AppenderConsole,
AppenderFileRotatingDate,
AppenderFileRotatingTime,
AppenderFileRotating,
AppenderFile,
AppenderTable