Creates Logger object which can be used for logging with different level of verbosity. Log messages are in JSON format.
new()Creates Logger object.
Logger$new(
level = c("info", "fatal", "error", "warn", "debug", "trace", "off", "all"),
name = "ROOT",
printer = NULL
)levelLog level. Allowed values: info, fatal, error, warn, debug, trace, off, all.
nameLogger name.
printerLogger with sink defined by printer function.
It should have signature function(timestamp, level, logger_name, pid, message).
By default when printer = NULL logger writes message in JSON format to stdout.
set_name()Sets logger name.
Logger$set_name(name = "ROOT")nameLogger name.
set_log_level()Sets log level.
Logger$set_log_level(
level = c("info", "fatal", "error", "warn", "debug", "trace", "off", "all")
)levelLog level. Allowed values: info, fatal, error, warn, debug, trace, off, all.
set_printer()Sets function which defines how to print logs.
Logger$set_printer(FUN = NULL)FUNPrinter function. Should be a function with 6 formal arguments: timestamp, level, logger_name, pid, message.
msgLog message.
...Additionals params.
msgLog message.
...Additionals params.
info()Write information message.
Logger$info(msg, ...)msgLog message.
...Additionals params.
warn()Write warning message.
Logger$warn(msg, ...)msgLog message.
...Additionals params.
error()Write error message.
Logger$error(msg, ...)msgLog message.
...Additionals params.
fatal()Write fatal error message.
Logger$fatal(msg, ...)msgLog message.
...Additionals params.
clone()The objects of this class are cloneable with this method.
Logger$clone(deep = FALSE)deepWhether to make a deep clone.
lgr::Logger
# init logger
logger = Logger$new("info")
# write info message
logger$info("hello world")
# write extended log entry
logger$info("", context = list(message = "hello world", code = 0L))
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