/
winston.js
89 lines (75 loc) · 1.89 KB
/
winston.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
/*
* moleculer
* Copyright (c) 2019 MoleculerJS (https://github.com/moleculerjs/moleculer)
* MIT Licensed
*/
"use strict";
const BaseLogger = require("./base");
const _ = require("lodash");
/**
* Winston logger for Moleculer
*
* https://github.com/winstonjs/winston
*
* @class WinstonLogger
* @extends {BaseLogger}
*/
class WinstonLogger extends BaseLogger {
/**
* Creates an instance of WinstonLogger.
* @param {Object} opts
* @memberof WinstonLogger
*/
constructor(opts) {
super(opts);
this.opts = _.defaultsDeep(this.opts, {
winston: {
level: "silly",
},
createLogger: null
});
}
/**
* Initialize logger.
*
* @param {LogFactory} logFactory
*/
init(logFactory) {
super.init(logFactory);
try {
this.winston = require("winston").createLogger(this.opts.winston);
} catch(err) {
/* istanbul ignore next */
this.broker.fatal("The 'winston' package is missing! Please install it with 'npm install winston --save' command!", err, true);
}
}
/**
*
* @param {object} bindings
*/
getLogHandler(bindings) {
let level = this.getLogLevel(bindings ? bindings.mod : null);
if (!level)
return null;
const levelIdx = BaseLogger.LEVELS.indexOf(level);
const logger = _.isFunction(this.opts.createLogger) ? this.opts.createLogger(level, bindings) : this.winston.child({ level, ...bindings });
return (type, args) => {
const typeIdx = BaseLogger.LEVELS.indexOf(type);
if (typeIdx > levelIdx) return;
switch(type) {
case "info": return logger.info(...args);
case "fatal":
case "error": return logger.error(...args);
case "warn": return logger.warn(...args);
case "debug": return logger.debug(...args);
case "trace": return logger.log("silly", ...args);
default: {
if (logger[type])
return logger[type](...args);
return logger.info(...args);
}
}
};
}
}
module.exports = WinstonLogger;