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#pragma once
#include <forstio/reduce_templates.hpp>
#include "transfer.hpp"
namespace saw {
namespace rmt {
struct Loopback {};
}
template<typename... Schema, typename Encoding>
class data_server<tmpl_group<Schema...>, Encoding, rmt::Loopback> {
private:
typename impl::data_server_redux<Encoding, storage::Default, typename tmpl_reduce<tmpl_group<Schema...>>::type>::type values_;
ptr<remote<rmt::Loopback>> remote_;
public:
data_server(remote_address<rmt::Loopback>& addr)
/**
* Get data from client
*/
template<typename Sch>
error_or<void> send(const data<Sch, Encoding, storage::Default>& dat, id<Sch> store_id){
auto& vals = std::get<std::unordered_map<uint64_t, data<Sch,Encoding>>>(values_);
try {
auto insert_res = vals.emplace(std::make_pair(store_id.get_value(), std::move(dat)));
if(!insert_res.second){
return make_error<err::already_exists>();
}
}catch(std::exception& ){
return make_error<err::out_of_memory>();
}
return void_t{};
}
/**
*
*/
template<typename Sch>
error_or<void> allocate(data<typename meta_schema<Sch>::MetaSchema, Encoding> meta, id<Sch> store_id){
auto& vals = std::get<std::unordered_map<uint64_t, data<Sch,Encoding>>>(values_);
try {
auto insert_res = vals.emplace(std::make_pair(store_id.get_value(), data<typename meta_schema<Sch>::MetaSchema, Encoding>{std::move(meta)}));
if(!insert_res.second){
return make_error<err::already_exists>();
}
}catch(std::exception& ){
return make_error<err::out_of_memory>();
}
return make_void();
}
template<typename Sch>
error_or<data<Sch, Encoding, storage::Default>> receive(id<Sch> store_id){
auto& vals = std::get<std::unordered_map<uint64_t, data<Sch,Encoding>>>(values_);
auto find_res = vals.find(store_id.get_value());
if(find_res == vals.end()){
return make_error<err::not_found>();
}
auto& dat = find_res->second;
return dat;
}
template<typename Sch>
error_or<void> erase(id<Sch> store_id){
auto& vals = std::get<std::unordered_map<uint64_t, data<Sch,Encoding>>>(values_);
auto erase_op = vals.erase(store_id.get_value());
if(erase_op == 0u){
return make_error<err::not_found>();
}
return void_t{};
}
template<typename Sch>
error_or<data<Sch, Encoding, storage::Default>*> find(id<Sch> store_id){
auto& vals = std::get<std::unordered_map<uint64_t, data<Sch,Encoding>>>(values_);
auto find_res = vals.find(store_id.get_value());
if(find_res == vals.end()){
return make_error<err::not_found>();
}
auto& dat = find_res->second;
return &dat;
}
};
/**
* Client for transporting data to remote and receiving data back
*/
template<typename... Schema, typename Encoding>
class data_client<tmpl_group<Schema...>, Encoding, rmt::Loopback> {
private:
/**
* Corresponding server for this client
*/
data_server<tmpl_group<Schema...>, Encoding, rmt::Loopback>* srv_;
/**
* The next id for identifying issues on the remote side.
*/
uint64_t next_id_;
public:
/**
* Main constructor
*/
data_client(data_server<tmpl_group<Schema...>, Encoding, rmt::Loopback>& srv__):
srv_{&srv__},
next_id_{0u}
{}
/**
* Send data to the remote.
*/
template<typename Sch>
error_or<id<Sch>> send(const data<Sch, Encoding, storage::Default>& dat){
id<Sch> dat_id{next_id_};
auto eov = srv_->send(dat, dat_id);
if(eov.is_error()){
auto& err = eov.get_error();
return std::move(err);
}
++next_id_;
return dat_id;
}
/**
* Preallocate data
*/
template<typename Sch>
error_or<id<Sch>> allocate(const data<typename meta_schema<Sch>::MetaSchema, Encoding>& meta){
id<Sch> dat_id{next_id_};
auto eov = srv_->allocate(meta, dat_id);
if(eov.is_error()){
auto& err = eov.get_error();
return std::move(err);
}
++next_id_;
return dat_id;
}
/**
* Receive data
*/
template<typename Sch>
conveyor<data<Sch, Encoding, storage::Default>> receive(id<Sch> dat_id){
auto eov = srv_->receive(dat_id);
if(eov.is_error()){
auto& err = eov.get_error();
return std::move(err);
}
auto& val = eov.get_value();
return std::move(val);
}
/**
* Erase data
*/
template<typename Sch>
error_or<void> erase(id<Sch> dat_id){
return srv_->erase(dat_id);
}
/**
* An exception for the Loopback backend. Here we can safely use find from
* the client side.
*/
template<typename Sch>
error_or<data<Sch, Encoding>*> find(id<Sch> dat_id){
auto eov = srv_->find(dat_id);
if(eov.is_error()){
auto& err = eov.get_error();
return std::move(err);
}
auto val = eov.get_value();
return val;
}
};
}
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