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partisan_rpc_backend.erl
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partisan_rpc_backend.erl
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%% -------------------------------------------------------------------
%%
%% Copyright (c) 2018 Christopher S. Meiklejohn. All Rights Reserved.
%% Copyright (c) 2022 Alejandro M. Ramallo. All Rights Reserved.
%%
%% This file is provided to you under the Apache License,
%% Version 2.0 (the "License"); you may not use this file
%% except in compliance with the License. You may obtain
%% a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing,
%% software distributed under the License is distributed on an
%% "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
%% KIND, either express or implied. See the License for the
%% specific language governing permissions and limitations
%% under the License.
%%
%% -------------------------------------------------------------------
-module(partisan_rpc_backend).
-author("Christopher S. Meiklejohn <christopher.meiklejohn@gmail.com>").
-behaviour(gen_server).
%% API
-export([start_link/0]).
%% gen_server callbacks
-export([init/1]).
-export([handle_call/3]).
-export([handle_cast/2]).
-export([handle_info/2]).
-export([terminate/2]).
-export([code_change/3]).
-record(state, {}).
-include("partisan.hrl").
%% =============================================================================
%% API
%% =============================================================================
start_link() ->
gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
%% =============================================================================
%% GEN_SERVER_CALLBACKS
%% =============================================================================
init([]) ->
{ok, #state{}}.
handle_call(_Msg, _From, State) ->
{reply, ok, State}.
handle_cast(_Msg, State) ->
{noreply, State}.
handle_info({call, M, F, A, _Timeout, {origin, Caller}}, State) ->
%% Execute function.
Response =
try
erlang:apply(M, F, A)
catch
_:Reason ->
{badrpc, Reason}
end,
%% Send the response to execution.
Opts = partisan_rpc:prepare_opts(partisan_config:get(forward_options, [])),
ok = partisan:forward_message(Caller, {rpc_response, Response}, Opts),
{noreply, State};
handle_info(_Msg, State) ->
{noreply, State}.
terminate(_Reason, _State) ->
ok.
code_change(_OldVsn, State, _Extra) ->
{ok, State}.