Log to a memory buffer
An Appender that Buffers LogEvents in-memory and and redirects them to other Appenders once certain conditions are met.
appenders, set_appenders()
Like for a Logger. Buffered events will be passed on to these Appenders once a flush is triggered
flush_on_exit, set_flush_on_exit(x)TRUE or FALSE: Whether the
buffer should be flushed when the Appender is garbage collected (f.e when
you close R)
flush_on_rotate, set_flush_on_rotateTRUE or FALSE: Whether
the buffer should be flushed when the Buffer is full (f.e when you close
R). Setting this to off can have slightly negative performance impacts.
lgr::Filterable -> lgr::Appender -> lgr::AppenderMemory -> AppenderBuffer
new()
The Layout for this Appender is used only to format console output of
its $show() method.
AppenderBuffer$new(
threshold = NA_integer_,
layout = LayoutFormat$new(fmt = "%L [%t] %m", timestamp_fmt = "%H:%M:%S",
colors = getOption("lgr.colors")),
appenders = NULL,
buffer_size = 1000,
flush_threshold = NULL,
flush_on_exit = TRUE,
flush_on_rotate = TRUE,
should_flush = NULL,
filters = NULL
)flush()
Sends the buffer's contents to all attached Appenders and then clears the Buffer
AppenderBuffer$flush()
clear()
Clears the buffer, discarding all buffered Events
AppenderBuffer$clear()
set_appenders()
Exactly like A Logger, an AppenderBuffer can have an arbitrary amount of Appenders attached. When the buffer is flushed, the buffered events are dispatched to these Appenders.
AppenderBuffer$set_appenders(x)
xsingle Appender or a list thereof. Appenders control the
output of a Logger. Be aware that a Logger also inherits the Appenders
of its ancestors (see vignette("lgr", package = "lgr") for more info
about Logger inheritance).
add_appender()
Add an Appender to the AppenderBuffer
Add or remove an Appender. Supplying a name is optional but
recommended. After adding an Appender with
appender$add_appender(AppenderConsole$new(), name = "console") you can
refer to it via appender$appenders$console. remove_appender() can
remove an Appender by position or name.
AppenderBuffer$add_appender(appender, name = NULL)
appendera single Appender
namea character scalar. Optional but recommended.
remove_appender()
remove an appender
AppenderBuffer$remove_appender(pos)
posinteger index or character name of the Appender(s) to
remove
format()
AppenderBuffer$format(...)
Other Appenders:
AppenderConsole,
AppenderFileRotatingDate,
AppenderFileRotatingTime,
AppenderFileRotating,
AppenderFile,
AppenderTable,
Appender
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