Log to the console
An Appender that outputs to the R console. If you have the package crayon installed log levels will be coloured by default (but you can modify this behaviour by passing a custom Layout).
lgr::Filterable -> lgr::Appender -> AppenderConsole
new()
AppenderConsole$new(
threshold = NA_integer_,
layout = LayoutFormat$new(fmt = "%L [%t] %m %f", timestamp_fmt = "%H:%M:%OS3",
colors = getOption("lgr.colors", list())),
filters = NULL
)append()
AppenderConsole$append(event)
Other Appenders:
AppenderBuffer,
AppenderFileRotatingDate,
AppenderFileRotatingTime,
AppenderFileRotating,
AppenderFile,
AppenderTable,
Appender
# create a new logger with propagate = FALSE to prevent routing to the root
# logger. Please look at the section "Logger Hirarchies" in the package
# vignette for more info.
lg <- get_logger("test")$set_propagate(FALSE)
lg$add_appender(AppenderConsole$new())
lg$add_appender(AppenderConsole$new(
layout = LayoutFormat$new("[%t] %c(): [%n] %m", colors = getOption("lgr.colors"))))
# Will output the message twice because we attached two console appenders
lg$warn("A test message")
lg$config(NULL) # reset configPlease choose more modern alternatives, such as Google Chrome or Mozilla Firefox.