add Prometheus library

2025-10-25 18:22:59 +02:00 · 2022-05-17 08:18:54 +02:00
parent 9577af8c6c
commit 3db861083f
103 changed files with 15824 additions and 5 deletions
--- a/Prometheus/src/MetricsServer.cpp
+++ b/Prometheus/src/MetricsServer.cpp
@@ -0,0 +1,118 @@
+//
+// MetricsServer.cpp
+//
+// Library: Prometheus
+// Package: HTTP
+// Module:  MetricsServer
+//
+// Copyright (c) 2022, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "Poco/Prometheus/MetricsServer.h"
+#include "Poco/Prometheus/MetricsRequestHandler.h"
+#include "Poco/Prometheus/Registry.h"
+#include "Poco/Net/HTTPRequestHandlerFactory.h"
+#include "Poco/Net/HTTPServerRequest.h"
+#include "Poco/Net/HTTPServerResponse.h"
+
+
+using namespace std::string_literals;
+
+
+namespace Poco {
+namespace Prometheus {
+
+
+class NotFoundRequestHandler: public Poco::Net::HTTPRequestHandler
+{
+public:
+	void handleRequest(Poco::Net::HTTPServerRequest& request, Poco::Net::HTTPServerResponse& response)
+	{
+		response.setStatusAndReason(Poco::Net::HTTPResponse::HTTP_NOT_FOUND);
+		response.setChunkedTransferEncoding(true);
+		response.setContentType("text/html"s);
+		response.send()
+			<< "<html>"
+			<< "<head><title>404 - Not Found</title></head>"
+			<< "<body><h1>Not Found</h1><p>The requested resource was not found.</p></body>"
+			<< "</html>";
+	}
+};
+
+
+class MetricsRequestHandlerFactory: public Poco::Net::HTTPRequestHandlerFactory
+{
+public:
+	MetricsRequestHandlerFactory(const Registry& registry, const std::string& path):
+		_registry(registry),
+		_path(path)
+	{
+	}
+
+	Poco::Net::HTTPRequestHandler* createRequestHandler(const Poco::Net::HTTPServerRequest& request)
+	{
+		if (request.getURI() == _path)
+		{
+			return new MetricsRequestHandler(_registry);
+		}
+		else
+		{
+			return new NotFoundRequestHandler;
+		}
+	}
+
+private:
+	const Registry& _registry;
+	const std::string _path;
+};
+
+
+const Poco::UInt16 MetricsServer::DEFAULT_PORT{9100};
+const std::string MetricsServer::DEFAULT_PATH{"/metrics"s};
+
+
+MetricsServer::MetricsServer(Poco::UInt16 port, const std::string& path):
+	_httpServer(new MetricsRequestHandlerFactory(Registry::defaultRegistry(), path), port, defaultParams())
+{
+}
+
+
+MetricsServer::MetricsServer(const Registry& registry, Poco::UInt16 port, const std::string& path):
+	_httpServer(new MetricsRequestHandlerFactory(registry, path), port, defaultParams())
+{
+}
+
+
+MetricsServer::MetricsServer(const Registry& registry, Poco::Net::ServerSocket& socket, Poco::Net::HTTPServerParams::Ptr pServerParams, const std::string& path):
+	_httpServer(new MetricsRequestHandlerFactory(registry, path), socket, pServerParams)
+{
+}
+
+
+void MetricsServer::start()
+{
+	_httpServer.start();
+}
+
+
+void MetricsServer::stop()
+{
+	_httpServer.stopAll();
+}
+
+
+Poco::Net::HTTPServerParams::Ptr MetricsServer::defaultParams()
+{
+	Poco::Net::HTTPServerParams::Ptr pParams = new Poco::Net::HTTPServerParams;
+	pParams->setMaxQueued(8);
+	pParams->setMaxThreads(2);
+	pParams->setKeepAlive(false);
+	return pParams;
+}
+
+
+} } // namespace Poco::Prometheus