Added heartbeat success checking

src/nlpworker.cpp

@@ -27,8 +27,18 @@ void heartbeat_timer(const boost::system::error_code & /*e*/,
     In our case however it is causing idle workers to be disconneted from RabbitMQ server.
     We can use heartbeat function to send data in order to keep connection alive.
  */
-	connection->heartbeat();
-	//std::cout << "Sent heartbeat\n";
+	std::cout << "Sending heartbeat\n";
+	bool hb_result = connection->heartbeat();
+	if (hb_result)
+	{
+		std::cout << "Heartbeat successful\n";
+	}
+	else
+	{
+		std::cout << "Heartbeat failed\n";
+	}
+	
+
 	t->expires_from_now(HEARTBEAT_TIMEOUT);
 	t->async_wait(boost::bind(heartbeat_timer,
 							  boost::asio::placeholders::error,