From b4fc8ec4a5f895f41b80c45b92c36b6ea6dedf78 Mon Sep 17 00:00:00 2001
From: Sandro Santilli <strk@keybit.net>
Date: Wed, 19 Feb 2014 15:27:20 +0100
Subject: [PATCH] Allow using ":host" as part of statsd.prefix

It'll be replaced with hostname.
Closes #153
---
 NEWS.md                          |  4 ++++
 lib/cartodb/cartodb_windshaft.js | 12 +++++++++++-
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/NEWS.md b/NEWS.md
index 80f2d85b..b35e4018 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,6 +1,10 @@
 1.8.2 -- 2014-MM-DD
 -------------------
 
+Enhancements:
+
+ * Allow using ":host" as part of statsd.prefix (#153)
+
 1.8.1 -- 2014-02-19
 -------------------
 
diff --git a/lib/cartodb/cartodb_windshaft.js b/lib/cartodb/cartodb_windshaft.js
index 9a40725e..8f76ab71 100644
--- a/lib/cartodb/cartodb_windshaft.js
+++ b/lib/cartodb/cartodb_windshaft.js
@@ -7,11 +7,21 @@ var _ = require('underscore')
     , cartoData  = require('cartodb-redis')(global.environment.redis)
     , SignedMaps = require('./signed_maps.js')
     , TemplateMaps = require('./template_maps.js')
-    , Cache = require('./cache_validator');
+    , Cache = require('./cache_validator')
+    , os = require('os')
+;
 
 var CartodbWindshaft = function(serverOptions) {
    var debug = global.environment.debug;
 
+    // Perform keyword substitution in statsd
+    // See https://github.com/CartoDB/Windshaft-cartodb/issues/153
+    if ( global.environment.statsd ) {
+      if ( global.environment.statsd.prefix ) {
+        global.environment.statsd.prefix = global.environment.statsd.prefix.replace(/:host/, os.hostname());
+      }
+    }
+
     if(serverOptions.cache_enabled) {
         console.log("cache invalidation enabled, varnish on ", serverOptions.varnish_host, ' ', serverOptions.varnish_port);
         Cache.init(serverOptions.varnish_host, serverOptions.varnish_port, serverOptions.varnish_secret);