statsd metrics reporting (#496)

added support for reporting metrics via statsd style UDP messaging, which is supported by many monitoring solution providers

this change adds reporting only of three cache related metrics (hit/miss/put) but this should be extended to include more metrics after additional evaluation

1 files changed, 39 insertions, 0 deletions

diff --git a/src/zenserver/stats/statsreporter.h b/src/zenserver/stats/statsreporter.h
new file mode 100644
index 000000000..ed6ec6c55
--- /dev/null
+++ b/src/zenserver/stats/statsreporter.h
@@ -0,0 +1,39 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+#pragma once
+
+#include "config.h"
+
+#include <zencore/thread.h>
+
+namespace zen {
+
+class StatsDaemonClient;
+
+class StatsProvider
+{
+public:
+	virtual void ReportMetrics(StatsDaemonClient& Statsd) = 0;
+};
+
+class StatsReporter
+{
+public:
+	StatsReporter();
+	~StatsReporter();
+
+	StatsReporter& operator=(const StatsReporter&) = delete;
+	StatsReporter(const StatsReporter&)			   = delete;
+
+	void Initialize(const ZenStatsConfig& Config);
+	void Shutdown();
+	void AddProvider(StatsProvider* Provider);
+	void ReportStats();
+
+private:
+	RwLock							   m_Lock;
+	std::unique_ptr<StatsDaemonClient> m_Statsd;
+	std::vector<StatsProvider*>		   m_Providers;
+};
+
+}  // namespace zen