Sync with mattermost 3.6.0

vendor/github.com/mattermost/platform/einterfaces/metrics.go

@@ -0,0 +1,41 @@
+// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+package einterfaces
+
+type MetricsInterface interface {
+	StartServer()
+	StopServer()
+
+	IncrementPostCreate()
+	IncrementPostSentEmail()
+	IncrementPostSentPush()
+	IncrementPostBroadcast()
+	IncrementPostFileAttachment(count int)
+
+	IncrementHttpRequest()
+	IncrementHttpError()
+	ObserveHttpRequestDuration(elapsed float64)
+
+	IncrementLogin()
+	IncrementLoginFail()
+
+	IncrementEtagHitCounter(route string)
+	IncrementEtagMissCounter(route string)
+
+	IncrementMemCacheHitCounter(cacheName string)
+	IncrementMemCacheMissCounter(cacheName string)
+
+	AddMemCacheHitCounter(cacheName string, amount float64)
+	AddMemCacheMissCounter(cacheName string, amount float64)
+}
+
+var theMetricsInterface MetricsInterface
+
+func RegisterMetricsInterface(newInterface MetricsInterface) {
+	theMetricsInterface = newInterface
+}
+
+func GetMetricsInterface() MetricsInterface {
+	return theMetricsInterface
+}