[user_events] Configure the provider name via exporter option (open-t…

…elemetry#455)

exporters/user_events/example/logs/main.cc

@@ -19,10 +19,12 @@ namespace user_events_logs = opentelemetry::exporter::user_events::logs;
 namespace
 {
 
+std::string provider_name;
+
 void InitLogger()
 {
   // Create user_events log exporter instance
-  auto exporter_options = user_events_logs::ExporterOptions();
+  auto exporter_options = user_events_logs::ExporterOptions(provider_name);
   auto exporter =
       std::unique_ptr<user_events_logs::Exporter>(new user_events_logs::Exporter(exporter_options));
   auto processor = logs_sdk::SimpleLogRecordProcessorFactory::Create(std::move(exporter));
@@ -58,8 +60,13 @@ std::string get_fruit_name_from_customer()
   }
 }
 
-int main()
+int main(int argc, char * argv[])
 {
+  if (argc > 1)
+  {
+    provider_name = argv[1];
+  }
+
   InitLogger();
 
   while (true)

exporters/user_events/include/opentelemetry/exporters/user_events/logs/exporter.h

@@ -48,16 +48,18 @@ class Exporter final : public opentelemetry::sdk::logs::LogRecordExporter
   const ExporterOptions options_;
   bool is_shutdown_ = false;
   mutable opentelemetry::common::SpinLockMutex lock_;
+
+  const std::array<event_level, 6> event_levels_map = {
+    static_cast<event_level>(6),
+    event_level_verbose,
+    event_level_information,
+    event_level_warning,
+    event_level_error,
+    event_level_critical_error
+  };
 
-  ehd::Provider provider_{"opentelemetry_logs"};
-  std::array<std::shared_ptr<const ehd::EventSet>, 6> event_set_levels_ = {
-      provider_.RegisterSet(static_cast<event_level>(6), 1),
-      provider_.RegisterSet(event_level_verbose, 1),
-      provider_.RegisterSet(event_level_information, 1),
-      provider_.RegisterSet(event_level_warning, 1),
-      provider_.RegisterSet(event_level_error, 1),
-      provider_.RegisterSet(event_level_critical_error, 1)};
-
+  ehd::Provider provider_;
+  std::array<std::shared_ptr<const ehd::EventSet>, 6> event_set_levels_;
 };  // class Exporter
 
 }  // namespace logs

exporters/user_events/include/opentelemetry/exporters/user_events/logs/exporter_options.h

@@ -14,8 +14,33 @@ namespace user_events
 namespace logs
 {
 
+const std::string kDefaultUserEventsLogsProviderName = "opentelemetry_logs";
+
+/**
+ * Struct to hold the options needed for the user_events logs exporter.
+ */
+
 struct ExporterOptions
-{};
+{
+public:
+    ExporterOptions() : ExporterOptions(kDefaultUserEventsLogsProviderName) {}
+
+    ExporterOptions(std::string provider_name)
+    {
+        if (provider_name.empty())
+        {
+            this->provider_name = kDefaultUserEventsLogsProviderName;
+        }
+        else
+        {
+            this->provider_name = provider_name;
+        }
+    }
+
+public:
+    std::string provider_name;
+};
+
 }  // namespace logs
 }  // namespace user_events
 }  // namespace exporter

exporters/user_events/src/logs_exporter.cc

@@ -19,7 +19,14 @@ namespace logs
 
 /*********************** Constructor ***********************/
 
-Exporter::Exporter(const ExporterOptions &options) noexcept : options_(options) {}
+Exporter::Exporter(const ExporterOptions &options) noexcept : options_(options), provider_(options.provider_name)
+{
+  // Initialize the event sets
+  for (int i = 0; i < sizeof(event_levels_map)/sizeof(event_levels_map[0]); i++)
+  {
+    event_set_levels_[i] = provider_.RegisterSet(event_levels_map[i], 1);
+  }
+}
 
 /*********************** Exporter methods ***********************/