lib/logger/slf4j.js - Code Metrics - Inspection of "Releasing version 0.3.0" - ama-team/voxengine-sdk - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( f2a0af...598926 )

by Fike

created 2017-08-21 08:36 UTC

lib/logger/slf4j.js B

↳ Parent: Project

Complexity

Total Complexity	39
Complexity/F	1.5

Size

Lines of Code	262
Function Count	26

Duplication

Duplicated Lines	0
Ratio	0 %

Importance

Changes	3
Bugs	0	Features	0

Metric	Value
cc	0
nc	48
dl	0
loc	262
rs	8.2857
c	3
b	0
f	0
wmc	39
mnd	1
bc	36
fnc	26
bpm	1.3846
cpm	1.5
noi	0

4 Functions

Rating	Name	Size	Complexity
A	Object.forEach	3	1
B	slf4j.js ➔ Slf4j	138	4
A	Slf4j.Context	19	1
A	Slf4j.factory	14	3

/**
 * @module logger/slf4j
 */

var C = require('./_common')
var Level = C.Level
var Threshold = C.Threshold
var levelOf = C.level
var toThreshold = C.threshold
var Context = C.Context

/**
 * @class Slf4j
 *
 * @param {string} [name] Logger name.
 * @param {Context} [context] Logger context.
 *
 * @implements IVarArgLogger
 */
function Slf4j (name, context) {
  if (!context) {
    context = DefaultContext
  }
  // backward compatibility for 0.1.x/0.2.x
  if (!(context instanceof Context)) {
    context = new Slf4j.Context(context, arguments[2])
  }
  var mdc = {}

  function substitute (pattern, substitutions) {
    var e = substitutions.filter(function (s) { return s instanceof Error })
    var o = substitutions.filter(function (s) { return !(s instanceof Error) })
    var s = o.reduce(function (carrier, s) {
      return carrier.replace('{}', render(s))
    }, pattern)

    return e.reduce(function (carrier, e) {
      return carrier + '\n' + renderException(e)
    }, s)
  }

  function renderException (e) {
    return e.name + ': ' + e.message + '\nStack:\n' + e.stack
  }

  function render (v) {
    v = typeof v === 'undefined' ? '{undefined}' : v
    // noinspection EqualityComparisonWithCoercionJS
    return v != null && v.constructor === String ? v : JSON.stringify(v)
  }

  function log (level, pattern) {
    level = levelOf(level)
    if (toThreshold(level) < toThreshold(context.getLevel(name))) {
      return
    }
    var prefix = '[' + level.toUpperCase() + ']'
    if (name) {
      prefix += ' ' + name
    }
    var mdcPrefix = Object.keys(mdc).map(function (key) {
      return key + '=' + render(mdc[key])
    }).join(', ')
    if (mdcPrefix) {
      prefix += ' [' + mdcPrefix + ']'
    }
    var subs = [].slice.call(arguments, 2)
    context.getWriter(name).write(substitute(prefix + ': ' + pattern, subs))
  }

  // noinspection JSUnusedGlobalSymbols
  this.log = log

  for (var i = Threshold.TRACE; i <= Threshold.ERROR; i++) {
    this[levelOf(i).toLowerCase()] = (function (self, threshold) {
      return function () {
        log.apply(null, ([threshold].concat([].slice.call(arguments))))
      }
    })(this, i)
  }

  this.getName = function () { return name }

  this.setWriter = function (writer) {
    context.setWriter(name, writer)
    return this
  }

  this.getWriter = function () { return context.getWriter(name) }

  this.setLevel = function (level) {
    context.setLevel(name, level)
    return this
  }

  this.getLevel = function () { return context.getLevel(name) }

  /**
   * @deprecated
   */
  this.setThreshold = this.setLevel

  /**
   * @deprecated
   */
  this.getThreshold = this.getLevel

  this.getContext = function () { return context }

  this.attach = function (name, value) { mdc[name] = value }

  this.detach = function (name) { delete mdc[name] }

  this.attachAll = function (values) { mdc = values }

  this.detachAll = function () {
    var b = mdc
    mdc = {}
    return b
  }

  /**
   * @function Slf4j#trace
   * @param {string} pattern Logging pattern with `{}` as a place for substitution
   * @param {...object} parameters List of pattern parameters
   */

  /**
   * @function Slf4j#debug
   * @param {string} pattern Logging pattern with `{}` as a place for substitution
   * @param {...object} parameters List of pattern parameters
   */

  /**
   * @function Slf4j#notice
   * @param {string} pattern Logging pattern with `{}` as a place for substitution
   * @param {...object} parameters List of pattern parameters
   */

  /**
   * @function Slf4j#info
   * @param {string} pattern Logging pattern with `{}` as a place for substitution
   * @param {...object} parameters List of pattern parameters
   */

  /**
   * @function Slf4j#warn
   * @param {string} pattern Logging pattern with `{}` as a place for substitution
   * @param {...object} parameters List of pattern parameters
   */

  /**
   * @function Slf4j#error
   * @param {string} pattern Logging pattern with `{}` as a place for substitution
   * @param {...object} parameters List of pattern parameters
   */
}

/**
 * @class
 * @extends {Context.<Slf4j>}
 */
Slf4j.Context = function () {
  Context.apply(this, arguments)
  var self = this
  /**
   * @param {string} name
   * @param {Level} [threshold]
   * @param {IWritable} [writer]
   * @return {Slf4j}
   */
  this.create = function (name, threshold, writer) {
    if (threshold) {
      self.setLevel(name, threshold)
    }
    if (writer) {
      self.setWriter(name, writer)
    }
    return new Slf4j(name, self)
  }
}
Slf4j.Context.prototype = Object.create(Context.prototype)
Slf4j.Context.constructor = Slf4j.Context

var DefaultContext = new Slf4j.Context()

/**
 * @function Slf4j.create
 * @param {string} name
 * @param {Level} [level]
 * @param {IWritable} [writer]
 * @return {Slf4j}
 */

/**
 * @function Slf4j.getWriter
 * @param {string} name
 * @return {IWritable}
 */

/**
 * @function Slf4j.setWriter
 * @param {string} name
 * @param {IWritable} writer
 * @return {ILoggerContext.<Slf4j>}
 */

/**
 * @function Slf4j.getLevel
 * @param {string} name
 * @return {Level}
 */

/**
 * @function Slf4j.setLevel
 * @param {string} name
 * @param {Level} level
 * @return {ILoggerContext.<Slf4j>}
 */

/**
 * @deprecated
 * @function Slf4j.getThreshold
 * @param {string} name
 * @return {Level}
 */

/**
 * @deprecated
 * @function Slf4j.setThreshold
 * @param {string} name
 * @param {Level} level
 * @return {ILoggerContext.<Slf4j>}
 */
Object.keys(DefaultContext).forEach(function (method) {
  Slf4j[method] = DefaultContext[method].bind(DefaultContext)
})

/**
 * @param {LoggerOptions} [options]
 * @param {String} [name] Default name to use in case options don't include it
 * @param {Context} [context] Default context
 * @param {Level} [level] Default logging level
 * @return {IVarArgLogger}
 */
Slf4j.factory = function (options, name, context, level) {
  options = options || {}
  if (typeof options.log === 'function') {
    // then instance of logger have been passed
    return options
  }
  if (options.instance) {
    return options.instance
  }
  context = options.context || context || Slf4j
  var logger = context.create(options.name || name, level || options.level)
  logger.attachAll(options.mdc || {})
  return logger
}

module.exports = {
  Slf4j: Slf4j,
  /** @deprecated */
  Context: Slf4j.Context,
  Level: Level
}


1			/**
2			* @module logger/slf4j
3			*/
4
5			var C = require('./_common')
6			var Level = C.Level
7			var Threshold = C.Threshold
8			var levelOf = C.level
9			var toThreshold = C.threshold
10			var Context = C.Context
11
12			/**
13			* @class Slf4j
14			*
15			* @param {string} [name] Logger name.
16			* @param {Context} [context] Logger context.
17			*
18			* @implements IVarArgLogger
19			*/
20			function Slf4j (name, context) {
21			if (!context) {
22			context = DefaultContext
23			}
24			// backward compatibility for 0.1.x/0.2.x
25			if (!(context instanceof Context)) {
26			context = new Slf4j.Context(context, arguments[2])
27			}
28			var mdc = {}
29
30			function substitute (pattern, substitutions) {
31			var e = substitutions.filter(function (s) { return s instanceof Error })
32			var o = substitutions.filter(function (s) { return !(s instanceof Error) })
33			var s = o.reduce(function (carrier, s) {
34			return carrier.replace('{}', render(s))
35			}, pattern)
36
37			return e.reduce(function (carrier, e) {
38			return carrier + '\n' + renderException(e)
39			}, s)
40			}
41
42			function renderException (e) {
43			return e.name + ': ' + e.message + '\nStack:\n' + e.stack
44			}
45
46			function render (v) {
47			v = typeof v === 'undefined' ? '{undefined}' : v
48			// noinspection EqualityComparisonWithCoercionJS
49			return v != null && v.constructor === String ? v : JSON.stringify(v)
50			}
51
52			function log (level, pattern) {
53			level = levelOf(level)
54			if (toThreshold(level) < toThreshold(context.getLevel(name))) {
55			return
56			}
57			var prefix = '[' + level.toUpperCase() + ']'
58			if (name) {
59			prefix += ' ' + name
60			}
61			var mdcPrefix = Object.keys(mdc).map(function (key) {
62			return key + '=' + render(mdc[key])
63			}).join(', ')
64			if (mdcPrefix) {
65			prefix += ' [' + mdcPrefix + ']'
66			}
67			var subs = [].slice.call(arguments, 2)
68			context.getWriter(name).write(substitute(prefix + ': ' + pattern, subs))
69			}
70
71			// noinspection JSUnusedGlobalSymbols
72			this.log = log
73
74			for (var i = Threshold.TRACE; i <= Threshold.ERROR; i++) {
75			this[levelOf(i).toLowerCase()] = (function (self, threshold) {
76			return function () {
77			log.apply(null, ([threshold].concat([].slice.call(arguments))))
78			}
79			})(this, i)
80			}
81
82			this.getName = function () { return name }
83
84			this.setWriter = function (writer) {
85			context.setWriter(name, writer)
86			return this
87			}
88
89			this.getWriter = function () { return context.getWriter(name) }
90
91			this.setLevel = function (level) {
92			context.setLevel(name, level)
93			return this
94			}
95
96			this.getLevel = function () { return context.getLevel(name) }
97
98			/**
99			* @deprecated
100			*/
101			this.setThreshold = this.setLevel
102
103			/**
104			* @deprecated
105			*/
106			this.getThreshold = this.getLevel
107
108			this.getContext = function () { return context }
109
110			this.attach = function (name, value) { mdc[name] = value }
111
112			this.detach = function (name) { delete mdc[name] }
113
114			this.attachAll = function (values) { mdc = values }
115
116			this.detachAll = function () {
117			var b = mdc
118			mdc = {}
119			return b
120			}
121
122			/**
123			* @function Slf4j#trace
124			* @param {string} pattern Logging pattern with `{}` as a place for substitution
125			* @param {...object} parameters List of pattern parameters
126			*/
127
128			/**
129			* @function Slf4j#debug
130			* @param {string} pattern Logging pattern with `{}` as a place for substitution
131			* @param {...object} parameters List of pattern parameters
132			*/
133
134			/**
135			* @function Slf4j#notice
136			* @param {string} pattern Logging pattern with `{}` as a place for substitution
137			* @param {...object} parameters List of pattern parameters
138			*/
139
140			/**
141			* @function Slf4j#info
142			* @param {string} pattern Logging pattern with `{}` as a place for substitution
143			* @param {...object} parameters List of pattern parameters
144			*/
145
146			/**
147			* @function Slf4j#warn
148			* @param {string} pattern Logging pattern with `{}` as a place for substitution
149			* @param {...object} parameters List of pattern parameters
150			*/
151
152			/**
153			* @function Slf4j#error
154			* @param {string} pattern Logging pattern with `{}` as a place for substitution
155			* @param {...object} parameters List of pattern parameters
156			*/
157			}
158
159			/**
160			* @class
161			* @extends {Context.<Slf4j>}
162			*/
163			Slf4j.Context = function () {
164			Context.apply(this, arguments)
165			var self = this
166			/**
167			* @param {string} name
168			* @param {Level} [threshold]
169			* @param {IWritable} [writer]
170			* @return {Slf4j}
171			*/
172			this.create = function (name, threshold, writer) {
173			if (threshold) {
174			self.setLevel(name, threshold)
175			}
176			if (writer) {
177			self.setWriter(name, writer)
178			}
179			return new Slf4j(name, self)
180			}
181			}
182			Slf4j.Context.prototype = Object.create(Context.prototype)
183			Slf4j.Context.constructor = Slf4j.Context
184
185			var DefaultContext = new Slf4j.Context()
186
187			/**
188			* @function Slf4j.create
189			* @param {string} name
190			* @param {Level} [level]
191			* @param {IWritable} [writer]
192			* @return {Slf4j}
193			*/
194
195			/**
196			* @function Slf4j.getWriter
197			* @param {string} name
198			* @return {IWritable}
199			*/
200
201			/**
202			* @function Slf4j.setWriter
203			* @param {string} name
204			* @param {IWritable} writer
205			* @return {ILoggerContext.<Slf4j>}
206			*/
207
208			/**
209			* @function Slf4j.getLevel
210			* @param {string} name
211			* @return {Level}
212			*/
213
214			/**
215			* @function Slf4j.setLevel
216			* @param {string} name
217			* @param {Level} level
218			* @return {ILoggerContext.<Slf4j>}
219			*/
220
221			/**
222			* @deprecated
223			* @function Slf4j.getThreshold
224			* @param {string} name
225			* @return {Level}
226			*/
227
228			/**
229			* @deprecated
230			* @function Slf4j.setThreshold
231			* @param {string} name
232			* @param {Level} level
233			* @return {ILoggerContext.<Slf4j>}
234			*/
235			Object.keys(DefaultContext).forEach(function (method) {
236			Slf4j[method] = DefaultContext[method].bind(DefaultContext)
237			})
238
239			/**
240			* @param {LoggerOptions} [options]
241			* @param {String} [name] Default name to use in case options don't include it
242			* @param {Context} [context] Default context
243			* @param {Level} [level] Default logging level
244			* @return {IVarArgLogger}
245			*/
246			Slf4j.factory = function (options, name, context, level) {
247			options = options \|\| {}
248			if (typeof options.log === 'function') {
249			// then instance of logger have been passed
250			return options
251			}
252			if (options.instance) {
253			return options.instance
254			}
255			context = options.context \|\| context \|\| Slf4j
256			var logger = context.create(options.name \|\| name, level \|\| options.level)
257			logger.attachAll(options.mdc \|\| {})
258			return logger
259			}
260
261			module.exports = {
262			Slf4j: Slf4j,
263			/** @deprecated */
264			Context: Slf4j.Context,
265			Level: Level
266			}
267

ama-team / voxengine-sdk

Push — master ( f2a0af...598926 )

lib/logger/slf4j.js B

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4 Functions

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