source: trip-planner-front/node_modules/log4js/lib/logger.js@ fa375fe

Last change on this file since fa375fe was 6a3a178, checked in by Ema <ema_spirova@…>, 3 years ago

initial commit

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1/* eslint no-underscore-dangle:0 */
2const debug = require("debug")("log4js:logger");
3const LoggingEvent = require("./LoggingEvent");
4const levels = require("./levels");
5const clustering = require("./clustering");
6const categories = require("./categories");
7const configuration = require("./configuration");
8
9const stackReg = /at (?:(.+)\s+\()?(?:(.+?):(\d+)(?::(\d+))?|([^)]+))\)?/;
10function defaultParseCallStack(data, skipIdx = 4) {
11 const stacklines = data.stack.split("\n").slice(skipIdx);
12 const lineMatch = stackReg.exec(stacklines[0]);
13 if (lineMatch && lineMatch.length === 6) {
14 return {
15 functionName: lineMatch[1],
16 fileName: lineMatch[2],
17 lineNumber: parseInt(lineMatch[3], 10),
18 columnNumber: parseInt(lineMatch[4], 10),
19 callStack: stacklines.join("\n")
20 };
21 }
22 return null;
23}
24
25/**
26 * Logger to log messages.
27 * use {@see log4js#getLogger(String)} to get an instance.
28 *
29 * @name Logger
30 * @namespace Log4js
31 * @param name name of category to log to
32 * @param level - the loglevel for the category
33 * @param dispatch - the function which will receive the logevents
34 *
35 * @author Stephan Strittmatter
36 */
37class Logger {
38 constructor(name) {
39 if (!name) {
40 throw new Error("No category provided.");
41 }
42 this.category = name;
43 this.context = {};
44 this.parseCallStack = defaultParseCallStack;
45 debug(`Logger created (${this.category}, ${this.level})`);
46 }
47
48 get level() {
49 return levels.getLevel(
50 categories.getLevelForCategory(this.category),
51 levels.TRACE
52 );
53 }
54
55 set level(level) {
56 categories.setLevelForCategory(
57 this.category,
58 levels.getLevel(level, this.level)
59 );
60 }
61
62 get useCallStack() {
63 return categories.getEnableCallStackForCategory(this.category);
64 }
65
66 set useCallStack(bool) {
67 categories.setEnableCallStackForCategory(this.category, bool === true);
68 }
69
70 log(level, ...args) {
71 const logLevel = levels.getLevel(level, levels.INFO);
72 if (this.isLevelEnabled(logLevel)) {
73 this._log(logLevel, args);
74 }
75 }
76
77 isLevelEnabled(otherLevel) {
78 return this.level.isLessThanOrEqualTo(otherLevel);
79 }
80
81 _log(level, data) {
82 debug(`sending log data (${level}) to appenders`);
83 const loggingEvent = new LoggingEvent(
84 this.category,
85 level,
86 data,
87 this.context,
88 this.useCallStack && this.parseCallStack(new Error())
89 );
90 clustering.send(loggingEvent);
91 }
92
93 addContext(key, value) {
94 this.context[key] = value;
95 }
96
97 removeContext(key) {
98 delete this.context[key];
99 }
100
101 clearContext() {
102 this.context = {};
103 }
104
105 setParseCallStackFunction(parseFunction) {
106 this.parseCallStack = parseFunction;
107 }
108}
109
110function addLevelMethods(target) {
111 const level = levels.getLevel(target);
112
113 const levelStrLower = level.toString().toLowerCase();
114 const levelMethod = levelStrLower.replace(/_([a-z])/g, g =>
115 g[1].toUpperCase()
116 );
117 const isLevelMethod = levelMethod[0].toUpperCase() + levelMethod.slice(1);
118
119 Logger.prototype[`is${isLevelMethod}Enabled`] = function() {
120 return this.isLevelEnabled(level);
121 };
122
123 Logger.prototype[levelMethod] = function(...args) {
124 this.log(level, ...args);
125 };
126}
127
128levels.levels.forEach(addLevelMethods);
129
130configuration.addListener(() => {
131 levels.levels.forEach(addLevelMethods);
132});
133
134module.exports = Logger;
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