move testing and observability code to zenhttp (#266)

1 files changed, 62 insertions, 0 deletions

diff --git a/src/zenhttp/monitoring/httpstats.cpp b/src/zenhttp/monitoring/httpstats.cpp
new file mode 100644
index 000000000..a873b4977
--- /dev/null
+++ b/src/zenhttp/monitoring/httpstats.cpp
@@ -0,0 +1,62 @@
+// Copyright Epic Games, Inc. All Rights Reserved.
+
+#include "zenhttp/httpstats.h"
+
+namespace zen {
+
+HttpStatsService::HttpStatsService() : m_Log(logging::Get("stats"))
+{
+}
+
+HttpStatsService::~HttpStatsService()
+{
+}
+
+const char*
+HttpStatsService::BaseUri() const
+{
+	return "/stats/";
+}
+
+void
+HttpStatsService::RegisterHandler(std::string_view Id, IHttpStatsProvider& Provider)
+{
+	RwLock::ExclusiveLockScope _(m_Lock);
+	m_Providers.insert_or_assign(std::string(Id), &Provider);
+}
+
+void
+HttpStatsService::UnregisterHandler(std::string_view Id, IHttpStatsProvider& Provider)
+{
+	ZEN_UNUSED(Provider);
+
+	RwLock::ExclusiveLockScope _(m_Lock);
+	m_Providers.erase(std::string(Id));
+}
+
+void
+HttpStatsService::HandleRequest(HttpServerRequest& Request)
+{
+	using namespace std::literals;
+
+	std::string_view Key = Request.RelativeUri();
+
+	switch (Request.RequestVerb())
+	{
+		case HttpVerb::kHead:
+		case HttpVerb::kGet:
+			{
+				RwLock::SharedLockScope _(m_Lock);
+				if (auto It = m_Providers.find(std::string{Key}); It != end(m_Providers))
+				{
+					return It->second->HandleStatsRequest(Request);
+				}
+			}
+
+			[[fallthrough]];
+		default:
+			return;
+	}
+}
+
+}  // namespace zen