71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
#ifndef _JSON_RPC_CONNECTION_HPP_
|
|
#define _JSON_RPC_CONNECTION_HPP_
|
|
#include <fc/reflect_ptr.hpp>
|
|
#include <fc/json.hpp>
|
|
#include <fc/stream.hpp>
|
|
#include <fc/future.hpp>
|
|
|
|
namespace fc { namespace json {
|
|
namespace detail {
|
|
struct pending_result : virtual public promise_base {
|
|
typedef shared_ptr<pending_result> ptr;
|
|
virtual void handle_result( const fc::string& ) = 0;
|
|
void handle_error( const fc::string& );
|
|
int64_t id;
|
|
pending_result::ptr next;
|
|
};
|
|
template<typename T>
|
|
struct pending_result_impl : virtual public promise<T>, virtual public pending_result {
|
|
virtual void handle_result( const fc::string& s ) {
|
|
set_value( fc::json::from_string<T>(s) );
|
|
}
|
|
};
|
|
template<>
|
|
struct pending_result_impl<void> : virtual public promise<void>, virtual public pending_result {
|
|
virtual void handle_result( const fc::string& ) {
|
|
set_value();
|
|
}
|
|
};
|
|
}
|
|
|
|
/**
|
|
This class is designed to be used like this:
|
|
@code
|
|
class my_api {
|
|
|
|
future<int> function( const string& arg, int arg2 ) {
|
|
_con->invoke<int>( "function", {&arg,&arg2} );
|
|
}
|
|
private:
|
|
rpc_connection* _con;
|
|
};
|
|
@endcode
|
|
|
|
*/
|
|
class rpc_connection : virtual public retainable {
|
|
public:
|
|
rpc_connection();
|
|
rpc_connection( istream& i, ostream& o );
|
|
rpc_connection( rpc_connection&& c );
|
|
~rpc_connection();
|
|
|
|
rpc_connection& operator=(rpc_connection&& m);
|
|
|
|
void init( istream& i, ostream& o );
|
|
|
|
template<typename R, uint16_t N>
|
|
future<R> invoke( const fc::string& method, const cptr (¶ms)[N] ) {
|
|
auto r = new detail::pending_result_impl<R>();
|
|
invoke( detail::pending_result::ptr(r), method, N, params );
|
|
return promise<R>::ptr( r, true );
|
|
}
|
|
|
|
private:
|
|
void invoke( detail::pending_result::ptr&& p, const fc::string& m,
|
|
uint16_t nparam, const cptr* param );
|
|
class rpc_connection_d* my;
|
|
};
|
|
} } // fc::json
|
|
|
|
|
|
#endif // _JSON_RPC_CONNECTION_HPP_
|