Merge pull request #1981 from mguludag/v1.x

added mongodb sink

include/spdlog/sinks/mongo_sink.h

+// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+
+#pragma once
+
+//
+// Custom sink for mongodb
+// Building and using requires mongocxx library.
+// For building mongocxx library check the url below
+// http://mongocxx.org/mongocxx-v3/installation/
+// 
+
+#include "spdlog/common.h"
+#include "spdlog/details/log_msg.h"
+#include "spdlog/pattern_formatter.h"
+#include "spdlog/sinks/base_sink.h"
+#include <spdlog/details/synchronous_factory.h>
+
+#include <bsoncxx/builder/stream/document.hpp>
+#include <bsoncxx/types.hpp>
+#include <bsoncxx/view_or_value.hpp>
+
+#include <mongocxx/client.hpp>
+#include <mongocxx/instance.hpp>
+#include <mongocxx/uri.hpp>
+
+namespace spdlog {
+namespace sinks {
+template <typename Mutex> class mongo_sink : public base_sink<Mutex> {
+public:
+  mongo_sink(const std::string &db_name, const std::string &collection_name,
+             const std::string &uri = "mongodb://localhost:27017") {
+    try {
+      client_ = std::make_unique<mongocxx::client>(mongocxx::uri{uri});
+      db_name_ = db_name;
+      coll_name_ = collection_name;
+      set_pattern("%v");
+    } catch (const std::exception &e) {
+      throw spdlog_ex("Error opening database");
+    }
+  }
+
+  ~mongo_sink() { flush_(); }
+
+protected:
+  void sink_it_(const details::log_msg &msg) {
+    using bsoncxx::builder::stream::document;
+    using bsoncxx::builder::stream::finalize;
+
+    if (client_ != nullptr) {
+      memory_buf_t formatted;
+      base_sink<Mutex>::formatter_->format(msg, formatted);
+      auto doc = document{}
+                 << "timestamp" << bsoncxx::types::b_date(msg.time) << "level"
+                 << level::to_string_view(msg.level).data() << "message"
+                 << std::string(formatted.begin(), formatted.end())
+                 << "logger_name"
+                 << std::string(msg.logger_name.begin(), msg.logger_name.end())
+                 << "thread_id" << static_cast<int>(msg.thread_id) << finalize;
+      client_->database(db_name_).collection(coll_name_).insert_one(doc.view());
+    }
+  }
+
+  void flush_() {}
+
+  void set_pattern_(const std::string &pattern) {
+    formatter_ = std::unique_ptr<spdlog::pattern_formatter>(
+        new spdlog::pattern_formatter(pattern, pattern_time_type::local, ""));
+  }
+
+  void set_formatter_(std::unique_ptr<spdlog::formatter> sink_formatter) {}
+
+private:
+  static mongocxx::instance instance_;
+  std::string db_name_;
+  std::string coll_name_;
+  std::unique_ptr<mongocxx::client> client_ = nullptr;
+};
+mongocxx::instance mongo_sink<std::mutex>::instance_{};
+
+#include "spdlog/details/null_mutex.h"
+#include <mutex>
+using mongo_sink_mt = mongo_sink<std::mutex>;
+using mongo_sink_st = mongo_sink<spdlog::details::null_mutex>;
+
+} // namespace sinks
+  
+  template <typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger>
+mongo_logger_mt(const std::string &logger_name, const std::string &db_name,
+                const std::string &collection_name,
+                const std::string &uri = "mongodb://localhost:27017") {
+  return Factory::template create<sinks::mongo_sink_mt>(logger_name, db_name,
+                                                        collection_name, uri);
+}
+
+template <typename Factory = spdlog::synchronous_factory>
+inline std::shared_ptr<logger>
+mongo_logger_st(const std::string &logger_name, const std::string &db_name,
+                const std::string &collection_name,
+                const std::string &uri = "mongodb://localhost:27017") {
+  return Factory::template create<sinks::mongo_sink_st>(logger_name, db_name,
+                                                        collection_name, uri);
+}
+  
+} // namespace spdlog
+