Merge pull request #61 from JShabtai/feature/configurable-uri

Made the exposer URI configurable

Author: jupp0r

include/prometheus/exposer.h

@@ -3,6 +3,7 @@
 #include <atomic>
 #include <cstdint>
 #include <memory>
+#include <string>
 
 #include "histogram.h"
 #include "registry.h"
@@ -17,7 +18,8 @@ class MetricsHandler;
 
 class Exposer {
  public:
-  explicit Exposer(const std::string& bind_address);
+  explicit Exposer(const std::string& bind_address,
+                   const std::string& uri = std::string("/metrics"));
   ~Exposer();
   void RegisterCollectable(const std::weak_ptr<Collectable>& collectable);
 
@@ -26,5 +28,6 @@ class Exposer {
   std::vector<std::weak_ptr<Collectable>> collectables_;
   std::shared_ptr<Registry> exposer_registry_;
   std::unique_ptr<detail::MetricsHandler> metrics_handler_;
+  std::string uri_;
 };
 }

lib/exposer.cc

@@ -10,18 +10,17 @@
 
 namespace prometheus {
 
-static const auto uri = std::string{"/metrics"};
-
-Exposer::Exposer(const std::string& bind_address)
+Exposer::Exposer(const std::string& bind_address, const std::string& uri)
     : server_(new CivetServer{{"listening_ports", bind_address.c_str()}}),
       exposer_registry_(std::make_shared<Registry>()),
       metrics_handler_(
-          new detail::MetricsHandler{collectables_, *exposer_registry_}) {
+          new detail::MetricsHandler{collectables_, *exposer_registry_}),
+      uri_(uri) {
   RegisterCollectable(exposer_registry_);
   server_->addHandler(uri, metrics_handler_.get());
 }
 
-Exposer::~Exposer() { server_->removeHandler(uri); }
+Exposer::~Exposer() { server_->removeHandler(uri_); }
 
 void Exposer::RegisterCollectable(
     const std::weak_ptr<Collectable>& collectable) {