tcp_sink implementation for fluentbit

include/spdlog/tcp_sink.h

@@ -0,0 +1,47 @@
+
+#include <spdlog/spdlog.h>
+#include <spdlog/sinks/base_sink.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <unistd.h>
+using namespace std;
+template<typename Mutex>
+class tcp_sink : public spdlog::sinks::base_sink <Mutex>
+{
+public:
+    tcp_sink(std::string address,int port)
+    {
+        if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0)
+        {
+            printf("\n Socket creation error \n");
+        }
+        serv_addr.sin_family = AF_INET;
+        serv_addr.sin_port = htons(port);
+        if(inet_pton(AF_INET, address.c_str(), &serv_addr.sin_addr)<=0)
+        {
+            printf("\nInvalid address/ Address not supported \n");
+        }
+        if (connect(sock, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
+        {
+            printf("\nConnection Failed \n");
+        }
+
+    }
+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);
+        std::string message = fmt::to_string(formatted);
+        send(sock , message.c_str() , message.size() , 0 );
+    }
+
+    void flush_() override
+    {
+    }
+private:
+    int sock;
+    struct sockaddr_in serv_addr;
+};
+using tcp_sink_mt = tcp_sink<std::mutex>;
+using tcp_sink_st = tcp_sink<spdlog::details::null_mutex>;