moved all metrics to use the module, deleting old metrics file and added different check in err domain

services/filestore/app.coffee

@@ -37,8 +37,9 @@ app.use (req, res, next) ->
 	requestDomain.add req
 	requestDomain.add res
 	requestDomain.on "error", (err)->
+		metrics.inc "err.uncaught"
 		setTimeout(->
-			if !res.finished
+			if !res.headerSent
 				res.send(500)
 		, 3000)
 		logger = require('logger-sharelatex')

services/filestore/app/coffee/FileController.coffee

@@ -2,7 +2,7 @@ PersistorManager = require("./PersistorManager")
 settings = require("settings-sharelatex")
 logger = require("logger-sharelatex")
 FileHandler = require("./FileHandler")
-metrics = require("./metrics")
+metrics = require("metrics-sharelatex")
 oneDayInSeconds = 60 * 60 * 24
 
 module.exports =

services/filestore/app/coffee/FileConverter.coffee

@@ -1,5 +1,5 @@
 _ = require("underscore")
-metrics = require("./metrics")
+metrics = require("metrics-sharelatex")
 logger = require("logger-sharelatex")
 exec = require('child_process').exec
 approvedFormats = ["png"]

services/filestore/app/coffee/LocalFileWriter.coffee

@@ -3,7 +3,7 @@ uuid = require('node-uuid')
 path = require("path")
 _ = require("underscore")
 logger = require("logger-sharelatex")
-metrics = require("./metrics")
+metrics = require("metrics-sharelatex")
 
 module.exports = 
 

services/filestore/app/coffee/metrics.coffee

@@ -1,24 +0,0 @@
-StatsD = require('lynx')
-settings = require('settings-sharelatex')
-statsd = new StatsD('localhost', 8125, {on_error:->})
-
-buildKey = (key)-> "filestore.#{process.env.NODE_ENV}.#{key}"
-
-module.exports =
-	set : (key, value, sampleRate = 1)->
-		statsd.set buildKey(key), value, sampleRate
-
-	inc : (key, sampleRate = 1)->
-		statsd.increment buildKey(key), sampleRate
-
-	Timer : class
-		constructor :(key, sampleRate = 1)->
-			this.start = new Date()
-			this.key = buildKey(key)
-		done:->
-			timeSpan = new Date - this.start
-			statsd.timing(this.key, timeSpan, this.sampleRate)
-
-	gauge : (key, value, sampleRate = 1)->
-		statsd.gauge key, value, sampleRate
-