udp_sink.h

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// Copyright(c) 2015-present, Gabi Melman & spdlog contributors.
// Distributed under the MIT License (http://opensource.org/licenses/MIT)
 
#pragma once
 
#include <spdlog/common.h>
#include <spdlog/sinks/base_sink.h>
#include <spdlog/details/null_mutex.h>
#ifdef _WIN32
#    include <spdlog/details/udp_client-windows.h>
#else
#    include <spdlog/details/udp_client.h>
#endif
 
#include <mutex>
#include <string>
#include <chrono>
#include <functional>
 
// Simple udp client sink
// Sends formatted log via udp
 
namespace spdlog {
namespace sinks {
 
struct udp_sink_config
{
    std::string server_host;
    uint16_t server_port;
 
    udp_sink_config(std::string host, uint16_t port)
        : server_host{std::move(host)}
        , server_port{port}
    {}
};
 
template<typename Mutex>
class udp_sink : public spdlog::sinks::base_sink<Mutex>
{
public:
    // host can be hostname or ip address
    explicit udp_sink(udp_sink_config sink_config)
        : client_{sink_config.server_host, sink_config.server_port}
    {}
 
    ~udp_sink() override = default;
 
protected:
    void sink_it_(const spdlog::details::log_msg &msg) override
    {
        spdlog::memory_buf_t formatted;
        spdlog::sinks::base_sink<Mutex>::formatter_->format(msg, formatted);
        client_.send(formatted.data(), formatted.size());
    }
 
    void flush_() override {}
    details::udp_client client_;
};
 
using udp_sink_mt = udp_sink<std::mutex>;
using udp_sink_st = udp_sink<spdlog::details::null_mutex>;
 
} // namespace sinks
 
//
// factory functions
//
template<typename Factory = spdlog::synchronous_factory>
inline std::shared_ptr<logger> udp_logger_mt(const std::string &logger_name, sinks::udp_sink_config skin_config)
{
    return Factory::template create<sinks::udp_sink_mt>(logger_name, skin_config);
}
 
} // namespace spdlog