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#pragma once
#include "clickhouse_config.h"
#include <base/types.h>
#include <memory>
#include <string>
namespace DB
{
class GRPCServer;
class TCPServer;
/// Provides an unified interface to access a protocol implementing server
/// no matter what type it has (HTTPServer, TCPServer, MySQLServer, GRPCServer, ...).
class ProtocolServerAdapter
{
friend class ProtocolServers;
public:
ProtocolServerAdapter(ProtocolServerAdapter && src) = default;
ProtocolServerAdapter & operator =(ProtocolServerAdapter && src) = default;
ProtocolServerAdapter(const std::string & listen_host_, const char * port_name_, const std::string & description_, std::unique_ptr<TCPServer> tcp_server_);
#if USE_GRPC && !defined(CLICKHOUSE_KEEPER_STANDALONE_BUILD)
ProtocolServerAdapter(const std::string & listen_host_, const char * port_name_, const std::string & description_, std::unique_ptr<GRPCServer> grpc_server_);
#endif
/// Starts the server. A new thread will be created that waits for and accepts incoming connections.
void start() { impl->start(); }
/// Stops the server. No new connections will be accepted.
void stop() { impl->stop(); }
bool isStopping() const { return impl->isStopping(); }
/// Returns the number of currently handled connections.
size_t currentConnections() const { return impl->currentConnections(); }
/// Returns the number of current threads.
size_t currentThreads() const { return impl->currentThreads(); }
/// Returns the port this server is listening to.
UInt16 portNumber() const { return impl->portNumber(); }
const std::string & getListenHost() const { return listen_host; }
const std::string & getPortName() const { return port_name; }
const std::string & getDescription() const { return description; }
private:
class Impl
{
public:
virtual ~Impl() = default;
virtual void start() = 0;
virtual void stop() = 0;
virtual bool isStopping() const = 0;
virtual UInt16 portNumber() const = 0;
virtual size_t currentConnections() const = 0;
virtual size_t currentThreads() const = 0;
};
class TCPServerAdapterImpl;
class GRPCServerAdapterImpl;
std::string listen_host;
std::string port_name;
std::string description;
std::unique_ptr<Impl> impl;
};
}
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