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<a href="../index.html">All files</a> / <a href="index.html">lib</a> logger.js
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<div class='fl pad1y space-right2'>
<span class="strong">79.55% </span>
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<span class='fraction'>35/44</span>
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<span class="strong">25% </span>
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<span class='fraction'>3/12</span>
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<span class="strong">61.54% </span>
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<span class='fraction'>8/13</span>
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<span class="strong">81.4% </span>
<span class="quiet">Lines</span>
<span class='fraction'>35/43</span>
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<span class="cline-any cline-neutral">&nbsp;</span></td><td class="text"><pre class="prettyprint lang-js">/* eslint no-underscore-dangle:0 */
&nbsp;
'use strict';
&nbsp;
const levels = require('./levels');
const EventEmitter = require('events');
&nbsp;
const DEFAULT_CATEGORY = '[default]';
&nbsp;
let logWritesEnabled = true;
&nbsp;
/**
* @name LoggingEvent
* @namespace Log4js
*/
class LoggingEvent {
/**
* Models a logging event.
* @constructor
* @param {String} categoryName name of category
* @param {Log4js.Level} level level of message
* @param {Array} data objects to log
* @param {Logger} logger the associated logger
* @author Seth Chisamore
*/
constructor(categoryName, level, data, logger) {
this.startTime = new Date();
this.categoryName = categoryName;
this.data = data;
this.level = level;
this.logger = logger;
}
}
&nbsp;
/**
* Logger to log messages.
* use {@see log4js#getLogger(String)} to get an instance.
*
* @name Logger
* @namespace Log4js
* @param name name of category to log to
* @param level
*
* @author Stephan Strittmatter
*/
class Logger extends EventEmitter {
constructor(name, level) {
super();
&nbsp;
this.category = name || <span class="branch-1 cbranch-no" title="branch not covered" >DEFAULT_CATEGORY;</span>
&nbsp;
<span class="missing-if-branch" title="if path not taken" >I</span>if (level) {
<span class="cstat-no" title="statement not covered" > this.setLevel(level);</span>
}
}
&nbsp;
<span class="fstat-no" title="function not covered" > se</span>tLevel(level) {
<span class="cstat-no" title="statement not covered" > this.level = levels.toLevel(level, this.level || levels.TRACE);</span>
}
&nbsp;
<span class="fstat-no" title="function not covered" > re</span>moveLevel() {
<span class="cstat-no" title="statement not covered" > delete this.level;</span>
}
&nbsp;
log() {
/* eslint prefer-rest-params:0 */
// todo: once node v4 support dropped, use rest parameter instead
const args = Array.from(arguments);
const logLevel = levels.toLevel(args[0], levels.INFO);
<span class="missing-if-branch" title="if path not taken" >I</span>if (!this.isLevelEnabled(logLevel)) {
<span class="cstat-no" title="statement not covered" > return;</span>
}
this._log(logLevel, args.slice(1));
}
&nbsp;
isLevelEnabled(otherLevel) {
return this.level.isLessThanOrEqualTo(otherLevel);
}
&nbsp;
_log(level, data) {
const loggingEvent = new LoggingEvent(this.category, level, data, this);
this.emit('log', loggingEvent);
}
}
&nbsp;
Logger.DEFAULT_CATEGORY = DEFAULT_CATEGORY;
Logger.prototype.level = levels.TRACE;
&nbsp;
['Trace', 'Debug', 'Info', 'Warn', 'Error', 'Fatal', 'Mark'].forEach(addLevelMethods);
&nbsp;
function addLevelMethods(target) {
const level = levels.toLevel(target);
&nbsp;
const levelStrLower = level.toString().toLowerCase();
const levelMethod = levelStrLower.replace(/_([a-z])/g, <span class="fstat-no" title="function not covered" >g </span>=&gt; <span class="cstat-no" title="statement not covered" >g[1].toUpperCase())</span>;
const isLevelMethod = levelMethod[0].toUpperCase() + levelMethod.slice(1);
&nbsp;
Logger.prototype[`is${isLevelMethod}Enabled`] = <span class="fstat-no" title="function not covered" >fu</span>nction () {
<span class="cstat-no" title="statement not covered" > return this.isLevelEnabled(level.toString());</span>
};
&nbsp;
Logger.prototype[levelMethod] = <span class="fstat-no" title="function not covered" >fu</span>nction () {
/* eslint prefer-rest-params:0 */
// todo: once node v4 support dropped, use rest parameter instead
const args = <span class="cstat-no" title="statement not covered" >Array.from(arguments);</span>
<span class="cstat-no" title="statement not covered" > if (logWritesEnabled &amp;&amp; this.isLevelEnabled(level)) {</span>
<span class="cstat-no" title="statement not covered" > this._log(level, args);</span>
}
};
}
&nbsp;
/**
* Disable all log writes.
* @returns {void}
*/
function disableAllLogWrites() {
logWritesEnabled = false;
}
&nbsp;
/**
* Enable log writes.
* @returns {void}
*/
function enableAllLogWrites() {
logWritesEnabled = true;
}
&nbsp;
module.exports.LoggingEvent = LoggingEvent;
module.exports.Logger = Logger;
module.exports.disableAllLogWrites = disableAllLogWrites;
module.exports.enableAllLogWrites = enableAllLogWrites;
module.exports.addLevelMethods = addLevelMethods;
&nbsp;</pre></td></tr>
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