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@blueprod/logger

v0.1.9

Published

Logger

Downloads

3

Readme

blueprod Logger

The simple wrapper for Winston logger, just need to import and provide simple configurations under javascript object.

(Note: winston 3.x is used)

Supported transports:

  • console
  • file
  • database (mongodb)
  • http (soon)

How To Use

Example:

const options = {
  "console": {
    "enabled": true,
    "level": "debug"
  },
  "file": {
    "enabled": true,
    "level": "debug",
    "logAppend": true,
    /* 5MB */
    "maxsize": 5*1000000,
    "json": true,
    "prettyPrint": true,
    "depth": 10,
    "tailable": true,
    "zippedArchive": true,
    "datePattern": "yyyy-MM-dd"
  },
  "database": {
    /* @see: https://github.com/winstonjs/winston-mongodb */
    "enabled": true,
    /* url: mongodb://localhost:27017/blueprod_log */
    /* Will remove color attributes from the log entry message, defaults to false. */
    "decolorize": true,
    "leaveConnectionOpen": false,
  },
};

//const logger = require('@blueprod/logger')('MyLogger', options);
const logger = require('../src/Logger')('MyLogger', options);

logger.debug('your debug log message!');
logger.info('your info log message!');
logger.warn('your warn log message!');
logger.error('your error log message!');

Add Hook

TODO not working yet.

This will help us to capture the logger activities when there is a 'warning', 'error' logs.

const hook = {
  level : 'error',
  cb : function(hookInfo) {/* do something */}
};
logger.addHook(hook);

Returned hookInfo will contained propertyName connector(file, console, mongodb), level, message, meta.

Multiple Log Instances

You can use Logger with multiple instances, for each component just create a new instance of Logger with the input parameter is component name. For examples:

const userLogger = require('@blueprod/logger')({name : 'UserDataService'});
const groupLogger = require('@blueprod/logger')({name : 'GroupDataService'});

userLogger.error("Error message"); // error : [IoTDataService] - Error message
userLogger.warn("Warn message");
userLogger.info("Info message");
userLogger.debug("Debug message");
userLogger.verbose("Verbose message");

groupLogger.error("Error message"); // error : [ThingDataService] - Error message
groupLogger.warn("Warn message");
groupLogger.info("Info message");
groupLogger.debug("Debug message");
groupLogger.verbose("Verbose message");

Debug

Logger is built with support the DEBUG environment variable from debug which provides simple conditional logging.

For examples:

todo....

Roadmap

0.1.x

  • Basic functionalities as transports (console/file/database)
  • Debug
  • Hook

0.2.x

  • http support
  • stream support

0.3.x

  • bucket/s3 support
  • Send mail (i.e. on error)

License

MIT license

Author

Developed & maintained by EMSA TECHNOLOGY COMPANY LTD (contact @ emsa-technology dot com).