4 files changed, 160 insertions, 12 deletions

diff --git a/modules/codec/c++/rpc.hpp b/modules/codec/c++/remote.hpp
index 6b63580..5803154 100644
--- a/modules/codec/c++/rpc.hpp
+++ b/modules/codec/c++/remote.hpp
@@ -1,10 +1,10 @@
 #pragma once
 
 #include <forstio/id.hpp>
-#include <forstio/codec/data.hpp>
 #include <forstio/async/async.hpp>
 
-#include <forstio/codec/interface.hpp>
+#include "data.hpp"
+#include "interface.hpp"
 
 #include <variant>
 
diff --git a/modules/codec/c++/remote_loopback.hpp b/modules/codec/c++/remote_loopback.hpp
index 22ca15f..2949243 100644
--- a/modules/codec/c++/remote_loopback.hpp
+++ b/modules/codec/c++/remote_loopback.hpp
@@ -1,9 +1,9 @@
 #pragma once
 
-#include <forstio/codec/interface.hpp>
-
 #include <variant>
 
+#include "interface.hpp"
+#include "remote.hpp"
 #include "transfer_loopback.hpp"
 
 namespace saw {
@@ -37,7 +37,7 @@ class rpc_client<Iface, Encoding, Storage, rmt::Loopback> {
 	 * request the data from the remote
 	 */
 	template<typename IdT>
-	remote_data<IdT, Encoding, Storage, Remote> request_data(id<IdT> data);
+	remote_data<IdT, Encoding, Storage, rmt::Loopback> request_data(id<IdT> data);
 		
 	/** @todo
 	 * Determine type based on Name
@@ -64,19 +64,23 @@ private:
 	const remote_address<rmt::Loopback>* addr_;
 	InterfaceT iface_;
 public:
-	rpc_server(const remode_address<rmt::Loopback>& addr__, InterfaceT iface__):
+	rpc_server(const remote_address<rmt::Loopback>& addr__, InterfaceT iface__):
 		addr_{&addr__},
 		iface_{std::move(iface__)}
 	{}
+
+	// error_or<id<>>
 };
 
 template<>
 class remote<rmt::Loopback> {
-
+public:
 	/**
 	 * Resolves an address for the remote
 	 */
-	conveyor<remote_address<rmt::Loopback>> resolve_address();
+	error_or<own<remote_address<rmt::Loopback>>> parse_address(){
+		return heap<remote_address<rmt::Loopback>>();
+	}
 
 	/**
 	 * Connect to a remote
diff --git a/modules/codec/c++/transfer.hpp b/modules/codec/c++/transfer.hpp
index 1fb297e..2fdd0b9 100644
--- a/modules/codec/c++/transfer.hpp
+++ b/modules/codec/c++/transfer.hpp
@@ -6,4 +6,16 @@ class data_server;
 
 template<typename Schema, typename Encoding, typename Remote>
 class data_client;
+
+namespace impl {
+template<typename Encoding, typename Storage, typename T>
+struct data_server_redux {
+	using type = std::tuple<>;
+};
+
+template<typename Encoding, typename Storage, typename... Schema>
+struct data_server_redux<Encoding, Storage, tmpl_group<Schema...>> {
+	using type = std::tuple<std::unordered_map<uint64_t, data<Schema, Encoding, Storage>>...>;
+};
+}
 }
diff --git a/modules/codec/c++/transfer_loopback.hpp b/modules/codec/c++/transfer_loopback.hpp
index ec61669..6c81c9c 100644
--- a/modules/codec/c++/transfer_loopback.hpp
+++ b/modules/codec/c++/transfer_loopback.hpp
@@ -1,20 +1,152 @@
 #pragma once
 
+#include <forstio/reduce_templates.hpp>
+
+#include "transfer.hpp"
+
 namespace saw {
 namespace rmt {
 struct Loopback {};
 }
 
-template<typename Schema, typename Encoding>
-class data_server<Schema, Encoding, rmt::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_;
 public:
+	/**
+	 * 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<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;
+	}
 };
 
-template<typename Schema, typename Encoding>
-class data_client<Schema, Encoding, rmt::Loopback> {
+/**
+ * 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;
+	}
+
+	/**
+	 * 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;
+	}
+
 };
 
 }