Abstract class for logging to memory buffers
AppenderMemory is extended by Appenders that retain an in-memory event
buffer, such as AppenderBuffer and AppenderPushbullet from the
lgrExtra package.
lgr::Filterable -> lgr::Appender -> AppenderMemory
flush_on_exitA logical scalar. Should the buffer be flushed if
the Appender is destroyed (e.g. because the R session is terminated)?
flush_on_rotateA logical scalar. Should the buffer be flushed when it is
rotated because $buffer_size is exceeded?
should_flushA function with exactly one arguments: event.
$append() calls this function internally on the current LogEvent
and flushes the buffer if it evaluates to TRUE.
buffer_sizeinteger scalar >= 0. Maximum number of LogEvents
to buffer.
flush_thresholdA numeric or character threshold. LogEvents
with a log_level equal to or lower than this threshold trigger
flushing the buffer.
buffer_eventsA list of LogEvents. Contents of the buffer.
buffer_eventsA data.frame. Contents of the buffer converted
to a data.frame.
buffer_eventsA data.frame. Contents of the buffer converted
to a data.table.
new()
AppenderMemory$new(...)
append()
AppenderMemory$append(event)
flush()
Sends the buffer's contents to all attached Appenders and then clears the Buffer
AppenderMemory$flush()
clear()
Clears the buffer, discarding all buffered Events
AppenderMemory$clear()
set_buffer_size()
Set the maximum size of the buffer
AppenderMemory$set_buffer_size(x)
xan integer scalar >= 0. Number of LogEvents to buffer.
set_should_flush()
Set function that can trigger flushing the buffer
AppenderMemory$set_should_flush(x)
xA function with the single argument event. Setting x to
NULL is a shortcut for function(event) FALSE. See active bindings.
set_flush_on_exit()
Should the buffer be flushed when the Appender is destroyed?
AppenderMemory$set_flush_on_exit(x)
xA logical scalar. See active bindings.
set_flush_on_rotate()
Should the buffer be flushed if buffer_size is exceeded?
AppenderMemory$set_flush_on_rotate(x)
xA logical scalar. See active bindings.
set_flush_threshold()
Set threshold that triggers flushing
AppenderMemory$set_flush_threshold(level)
levelA numeric or character threshold. See
active bindings.
show()
Display the contents of the log table. Relies on the
$format_event method of the Layout attached to this Appender.
AppenderMemory$show(threshold = NA_integer_, n = 20L)
thresholdcharacter or integer scalar. The minimum log level
that should be displayed.
ninteger scalar. Show only the last n log entries that match
threshold.
format()
AppenderMemory$format(color = FALSE, ...)
Other abstract classes:
AppenderTable,
Appender,
Filterable
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