Logger

a node.js module used for logging and saving application messages and events.

Options

• logDebug Boolean - Defines if debug messages should be logged.
• logDetail Boolean - Defines if detail messages should be logged.
• logGeneral Boolean - Defines if general messages should be logged.
• logWarning Boolean - Defines if warning messages should be logged.
• logError Boolean - Defines if error messages should be logged.
• prefix String - Prefix each logged message with this string.
• writeLog Boolean - Defines if console messages should also be saved to disk.
  • Note: If writeLog is true, all below options are required.
• fileName String - The base name of the log files.
• filePath String - The Path that the log files should be saved to.
• fileSize String - The maximum size for each log file. Example (100M)
  • Byte = B
  • KiloByte = K
  • MegaByte = M
  • GigaByte = G
• fileAge Integer - The maximum number of days to write to one log file.
• fileCount Integer - The maximum number of log files to keep in rotation.

Functions

• debug(message) - green [year-month-day HH:MM:SS] DEBUG {prefix} message
• general(message) - white [year-month-day HH:MM:SS] GENERAL {prefix} message
• detail(message) - black [year-month-day HH:MM:SS] DETAIL {prefix} message
• warning(message) - yellow [year-month-day HH:MM:SS] WARNING {prefix} message
• error(message, trace?) - red [year-month-day HH:MM:SS] ERROR {prefix} message

if the message is an object, it will be stringified.

Usage

const logger = require('./Logger');

const log = new logger({
    logGeneral:  true,
    logWarning:  true,
    logError:  true,
    writeLog:  true,
    prefix:    'Test App - ',
    fileName: 'testLog.txt',
    filePath: 'c:\\logs\\testing\\',
    fileSize: '300M',
    fileAge: 1,
    fileCount: 5
});

log.general('Starting application...');