Get or set log record appender function — log_appender • logger

Get or set log record appender function

log_appender(appender = NULL, namespace = "global", index = 1)

Arguments

appender: function delivering a log record to the destination, eg appender_console, appender_file or appender_tee, default NULL
namespace: logger namespace
index: index of the logger within the namespace

See also

logger, log_threshold, log_layout and log_formatter

Examples

if (FALSE) {
## change appender to "tee" that writes to the console and a file as well
t <- tempfile()
log_appender(appender_tee(t))
log_info(42)
log_info(42:44)
readLines(t)

## poor man's tee by stacking loggers in the namespace
t <- tempfile()
log_appender(appender_console)
log_appender(appender_file(t), index = 2)
log_info(42)
readLines(t)
}