# README
logger - A simple logging layer on top of seelog
Implements multiple log channels to a single rotated log file. Log levels are considered a simple hierarchy with each channel having a single limit, below which logs to that channel are skipped.
The makeloggerinterface is a program to generate the interface.go
file to simplify its maintenance.
# Functions
global logging message.
global logging formatted message.
flush all channels and let log message goes to standard out.
flush all channels.
Set up the logging system.
ListLevels - return log level info in json format it's not lock protected, because it should be low frequency to list log levels.
Open a new logging channel with a specified tag.
global logging message + panic.
global logging formatted message + panic.
conditional panic.
UpdateTagLogLevel - update log level for specific tag.
# Constants
the initial level for unknown tags.
the tagname reserved to set the default level for unknown tags.
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# Structs
initial configuration for the logger
example of use (with structure tags for config file parsing) type AppConfiguration struct { … Logging logger.Configuration `libucl:"logging" hcl:"logging" json:"logging"` … }
err := logger.Initialise(conf.Logging) if nil != err { // if failed then display message and exit exitwithstatus.Message("logger error: %s", err) } defer logger.Finalise()
example of ucl/hcl configuration section logging { directory = "/var/lib/app/log" file = "app.log" size = 1048576 count = 50 #console = true # to duplicate messages to console (default false) levels { DEFAULT = "info" system = "error" main = "warn" } }.
The logging channel structure example of use
var log *logger.L log := logger.New("sometag")
log.Debugf("value: %d", value).
Level - log level info.
LogLevels - log levels.