From 00c0036ca5f0a333f315aab584e500f4c3b2d39a Mon Sep 17 00:00:00 2001
From: James Allen <james@sharelatex.com>
Date: Fri, 9 May 2014 13:30:12 +0100
Subject: [PATCH] Add open socket monitoring

---
 libraries/metrics/metrics.coffee      |  1 +
 libraries/metrics/open_sockets.coffee | 19 +++++++++++++++++++
 libraries/metrics/package.json        |  2 +-
 3 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 libraries/metrics/open_sockets.coffee

diff --git a/libraries/metrics/metrics.coffee b/libraries/metrics/metrics.coffee
index 0e6e9908f6..2b3c418046 100644
--- a/libraries/metrics/metrics.coffee
+++ b/libraries/metrics/metrics.coffee
@@ -33,4 +33,5 @@ module.exports =
 
 	mongodb: require "./mongodb"
 	http: require "./http"
+	open_sockets: require "./open_sockets"
 
diff --git a/libraries/metrics/open_sockets.coffee b/libraries/metrics/open_sockets.coffee
new file mode 100644
index 0000000000..d74a781496
--- /dev/null
+++ b/libraries/metrics/open_sockets.coffee
@@ -0,0 +1,19 @@
+URL = require "url"
+seconds = 1000
+
+module.exports = OpenSocketsMonitor =
+	monitor: (logger) ->
+		setInterval () ->
+			OpenSocketsMonitor.gaugeOpenSockets()
+		, 5 * seconds
+
+	gaugeOpenSockets: () ->
+		Metrics = require "./metrics"
+		for url, agents of require('http').globalAgent.sockets
+			url = URL.parse("http://#{url}")
+			hostname = url.hostname?.replace(/\./g, "_")
+			Metrics.gauge "open_connections.http.#{hostname}", agents.length
+		for url, agents of require('https').globalAgent.sockets
+			url = URL.parse("https://#{url}")
+			hostname = url.hostname?.replace(/\./g, "_")
+			Metrics.gauge "open_connections.https.#{hostname}", agents.length
diff --git a/libraries/metrics/package.json b/libraries/metrics/package.json
index a76929f2fa..23d2d2ae75 100644
--- a/libraries/metrics/package.json
+++ b/libraries/metrics/package.json
@@ -4,7 +4,7 @@
   "description": "A drop-in metrics and monitoring module for node.js apps",
   "dependencies": {
     "lynx": "~0.1.1",
-    "coffee-script": "~1.7.1",
+    "coffee-script": "1.6.0",
     "underscore": "~1.6.0"
   }
 }