Package index • lgr

Logger

Creates and dispatches LogEvents

Logger Loggers: Loggers

LoggerGlue: LoggerGlue

print(<Logger>) format(<Logger>) print(<ancestry>) format(<ancestry>): Print a Logger Object

logger_tree(): Logger Tree

print(<logger_tree>) format(<logger_tree>): Print Logger Trees

logger_index(): Return a data.frame of all registered loggers

get_log_levels() add_log_levels() remove_log_levels(): Manage Log Levels

log_exception() threshold() console_threshold() add_appender() remove_appender() show_log() show_dt() show_data(): Simple Logging

basic_config(): Basic Setup for the Logging System

get_logger() get_logger_glue(): Get/Create a Logger

logger_config() as_logger_config(): Logger Configuration Objects

default_exception_handler(): Demote an exception to a warning

Appenders

Output LogEvents to a destination

AppenderConsole: Log to the console

AppenderFile AppenderJson: Log to a file

AppenderFileRotating: Log to a rotating file

AppenderFileRotatingDate: Log to a date-stamped rotating file

AppenderFileRotatingTime: Log to a time-stamped rotating file

AppenderBuffer: Log to a memory buffer

print(<Appender>): Print an Appender object

Layouts

Format LogEvents before output

LayoutFormat: Format Log Events as Text

LayoutGlue: Format Log Events as Text via glue

LayoutJson: Format LogEvents as JSON

LogEvent

Contains the Data that is beeing logged

LogEvent LogEvents: LogEvents - The atomic unit of logging

as_LogEvent(): Coerce objects to LogEvent

as.data.frame(<LogEvent>) as.data.table.LogEvent() as_tibble.LogEvent(): Coerce LogEvents to Data Frames

event_list() as_event_list() as.data.table.event_list() as.data.frame(<event_list>): A List of LogEvents

print(<LogEvent>) format(<LogEvent>): Print or Format Logging Data

toString(<LogEvent>): Convert a LogEvent to a character string

Filters

Filter events passed to Appenders or Loggers

.obj(): Event Filters

FilterForceLevel: Override the log level of all events processed by a Logger/Appender

FilterInject: Inject values into all events processed by a Logger/Appender

is_filter(): Check if an R Object is a Filter

Utilities

General utility functions. Some may only be relevant to developers that want to extend lgr.

suspend_logging() unsuspend_logging() without_logging() with_logging(): Suspend All Logging

standardize_threshold() is_threshold() standardize_log_level() is_log_level() standardize_log_levels() is_log_levels(): Standardize User-Input Log Levels to Their Integer Representation

string_repr(): Short string representation for R objects

with_log_level() with_log_value(): Inject Values into Logging Calls

get_caller() get_user(): Information About the System

read_json_lines(): Read a JSON logfile

use_logger(): Setup a Simple Logger for a Package

label_levels() unlabel_levels(): Label/Unlabel Log Levels

colorize_levels(): Colorize Levels

pad_right pad_left: Pad Character Vectors

Abstract Classes

For Package developers that want to build new Appenders, Layouts or Loggers

Appender Appenders: Appenders

Layout Layouts: Abstract Class for Layouts

Filterable: Abstract Class for Filterables

AppenderTable: Abstract class for logging to tabular structures

AppenderMemory: Abstract class for logging to memory buffers

CannotInitializeAbstractClassError(): Logger Error Conditions