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#pragma once
#include "remote.hpp"
#include <map>
#include <forstio/codec/schema_hash.hpp>
namespace saw {
namespace rmt {
struct Loopback {};
}
template<>
class remote_address<rmt::Loopback> {
private:
data<schema::UInt64> addr_id_;
public:
remote_address(data<schema::UInt64> addr_id__):
addr_id_{addr_id__}
{}
const data<schema::UInt64>& get_address_id() const {
return addr_id_;
}
};
template<>
class remote<rmt::Loopback> {
private:
struct key_t {
std::array<uint64_t,3> data;
template<typename Schema, typename Encoding>
static key_t create(const remote_address<rmt::Loopback>& addr){
key_t k;
k.data = std::array<uint64_t,3>{addr.get_address_id().get(), schema_hash<Schema>::apply(), schema_hash<Encoding>::apply()};
return k;
}
bool operator<(const key_t& rhs) const {
for(uint64_t i = 0u; i < 3; ++i){
if(data[i] != rhs.data[i]){
return data[i] < rhs.data[i];
}
}
return false;
}
};
std::map<key_t, ptr<i_data_server<rmt::Loopback>>> registered_data_servers_;
std::map<key_t, ptr<i_rpc_server<rmt::Loopback>>> registered_rpc_servers_;
template<typename Iface, typename Encoding, uint64_t I>
error_or<void> find_data_servers_ele(typename rpc_server<Iface,Encoding,rmt::Loopback>::DataServers& ret_val, ref<remote_address<rmt::Loopback>> addr){
using DataTypeGroup = typename rpc_server<Iface,Encoding,rmt::Loopback>::TypeGroup;
if constexpr ( I < DataTypeGroup::size ){
using Schema = typename tmpl_group_pack_type<I,DataTypeGroup>::type;
constexpr auto class_id = data_server<Schema, Encoding, rmt::Loopback>::class_id;
key_t key;
key.data = std::array<uint64_t,3>{addr().get_address_id().get(), class_id.first, class_id.second};
auto find = registered_data_servers_.find(key);
if(find == registered_data_servers_.end()){
return make_error<err::not_found>("Server not found");
}
auto eo_dat_srv = find->second().template cast_to<data_server<Schema, Encoding, rmt::Loopback>>();
if(eo_dat_srv.is_error()){
auto& err = eo_dat_srv.get_error();
return std::move(err);
}
auto dat_srv = eo_dat_srv.get_value();
std::get<I>(ret_val) = dat_srv;
return find_data_servers_ele<Iface,Encoding,I+1u>(ret_val, addr);
}
return make_void();
}
template<typename Iface, typename Encoding>
error_or<typename rpc_server<Iface, Encoding, rmt::Loopback>::DataServers> find_data_servers(ref<remote_address<rmt::Loopback>> addr){
typename rpc_server<Iface,Encoding,rmt::Loopback>::DataServers ret_val;
{
auto eov = find_data_servers_ele<Iface,Encoding,0u>(ret_val,addr);
if(eov.is_error()){
return std::move(eov.get_error());
}
}
return ret_val;
}
public:
/**
* Resolves an address for the remote
*/
error_or<own<remote_address<rmt::Loopback>>> parse_address(data<schema::UInt64> id){
return heap<remote_address<rmt::Loopback>>(id);
}
/**
* Connect to a remote
*/
template<typename Iface, typename Encode>
conveyor<rpc_client<Iface, Encode, rmt::Loopback>> rpc_connect(const remote_address<rmt::Loopback>& addr);
/**
* Start listening
*/
template<typename Iface, typename Encode>
error_or<own<rpc_server<Iface, Encode, rmt::Loopback>>> rpc_listen(remote_address<rmt::Loopback>& addr, typename rpc_server<Iface,Encode,rmt::Loopback>::InterfaceT iface){
auto eo_dat_srvs = find_data_servers<Iface,Encode>(addr);
if(eo_dat_srvs.is_error()){
return std::move(eo_dat_srvs.get_error());
}
auto& dat_srvs = eo_dat_srvs.get_value();
return heap<rpc_server<Iface,Encode,rmt::Loopback>>(*this, addr, std::move(iface), dat_srvs);
}
/**
* Start data server
*/
template<typename Schema, typename Encode>
error_or<own<data_server<Schema, Encode, rmt::Loopback>>> data_listen(const remote_address<rmt::Loopback>& addr){
auto key_v = key_t::template create<Schema,Encode>(addr);
auto find = registered_data_servers_.find(key_v);
if(find != registered_data_servers_.end()){
return make_error<err::already_exists>("Server already bound to this address");
}
auto dat_srv = heap<data_server<Schema, Encode, rmt::Loopback>>(*this, addr);
return dat_srv;
}
/**
* Connect to a data server
*/
template<typename Schema, typename Encode>
conveyor<data_client<Schema, Encode, rmt::Loopback>> data_connect(const remote_address<rmt::Loopback>& addr){
constexpr auto class_id = data_server<Schema, Encode, rmt::Loopback>::class_id;
key_t key;
key.data = std::array<uint64_t,3>{addr.get_address_id().get(), class_id.first, class_id.second};
auto find = registered_data_servers_.find(key);
if(find == registered_data_servers_.end()){
return make_error<err::not_found>("Server not found");
}
auto eo_dat_srv = find->second().template cast_to<data_server<Schema, Encode, rmt::Loopback>>();
if(eo_dat_srv.is_error()){
auto& err = eo_dat_srv.get_error();
return std::move(err);
}
auto dat_srv = eo_dat_srv.get_value();
return data_client<Schema, Encode, rmt::Loopback>{dat_srv};
}
/**
* Internal function
*/
error_or<void> register_data_server(const remote_address<rmt::Loopback>& addr, i_data_server<rmt::Loopback>& srv){
auto class_id = srv.get_class_id();
key_t key;
key.data = std::array<uint64_t,3>{addr.get_address_id().get(), class_id.first, class_id.second};
auto insert = registered_data_servers_.emplace(std::make_pair(key, ptr<i_data_server<rmt::Loopback>>{srv}));
if(insert.second){
return make_error<err::already_exists>("Server already bound to this address");
}
return make_void();
}
error_or<void> deregister_data_server(const remote_address<rmt::Loopback>& addr, i_data_server<rmt::Loopback>& srv){
auto class_id = srv.get_class_id();
key_t key;
key.data = std::array<uint64_t,3>{addr.get_address_id().get(), class_id.first, class_id.second};
auto erase = registered_data_servers_.erase(key);
if(erase == 0u){
return make_error<err::not_found>("Server not found");
}
return make_void();
}
};
}
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