pelias-logger/index.js

The centralized logger package for Pelias.

/**
 * The main module of the logger package.
 */

'use strict';

var winston = require( 'winston' );
var peliasConfig = require( 'pelias-config' );

var pkgConfig = peliasConfig.generate().logger;

function CreateLogger( name, loggerOpts ){
  if( loggerOpts === undefined ){
    loggerOpts = {
      transports: [
        new winston.transports.Console( {
          colorize: pkgConfig.colorize,
          json: pkgConfig.json,
          stringify: true,
          timestamp: pkgConfig.timestamp,
          level: pkgConfig.level,
          label: name,
          stderrLevels: ["emerg", "alert", "crit", "error"]
        })
      ]
    };
  }

  return new winston.Logger( loggerOpts );
}

var loggers = {};

/**
 * If a logger named `name` exists, return it; otherwise, create a new one.
 */
function getLogger( name, loggerOpts ){
  if( name in loggers ){
    return loggers[ name ];
  }
  else {
    var logger = new CreateLogger( name, loggerOpts );
    loggers[ name ] = logger;
    return logger;
  }
}

module.exports = {
  get: getLogger,
  winston: winston
};