%%sometimes my loop returns ok because of timeout how to write this code in proper way.when there is a timeout it just returns ok but not my actual value that i am assuming.In handle call i am calling a function loop() in the loop() function i am receiving a message with receive clause .Now i am sending this data to my database using loop2 function returns response from database whether data has been sucessfully saved or not and giving response back to loop().But if there is a timeout my loop function returns ok but not actual value
-module(getAccDataCons).
-behaviour(gen_server).
-include_lib("deps/amqp_client/include/amqp_client.hrl").
-export([start_link/0, stop/0]).
-export([init/1, handle_call/3, handle_cast/2, handle_info/2, code_change/3,
terminate/2]).
-export([get_account/0]).
start_link() ->
gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
stop() ->
gen_server:cast(?MODULE, stop).
get_account() ->
gen_server:call(?MODULE, {get_account}).
init(_Args) ->
{ok, Connection} = amqp_connection:start(#amqp_params_network{host = "localhost"}),
{ok, Channel} = amqp_connection:open_channel(Connection),
{ok, Channel}.
handle_call({get_account}, _From, State) ->
amqp_channel:call(State, #'exchange.declare'{exchange = <<"get">>, type = <<"topic">>}),
amqp_channel:call(State, #'queue.declare'{queue = <<"get_account">>, durable = true}),
Binding =
#'queue.bind'{exchange = <<"get">>,
routing_key = <<"get.account">>,
queue = <<"get_account">>},
#'queue.bind_ok'{} = amqp_channel:call(State, Binding),
io:format(" [*] Waiting for logs. To exit press CTRL+C~n"),
amqp_channel:subscribe(State,#'basic.consume'{queue = <<"get_account">>, no_ack = true},self()),
Returned =loop(),
io:format("~nReti=~p",[Returned]),
{reply, Returned, State};
handle_call(Message, _From, State) ->
io:format("received other handle_call message: ~p~n", [Message]),
{reply, ok, State}.
handle_cast(stop, State) ->
{stop, normal, State};
handle_cast(Message, State) ->
io:format("received other handle_cast call : ~p~n", [Message]),
{noreply, State}.
handle_info(Message, State) ->
io:format("received handle_info message : ~p~n", [Message]),
{noreply, State}.
code_change(_OldVer, State, _Extra) ->
{ok, State}.
terminate(Reason, _State) ->
io:format("server is terminating with reason :~p~n", [Reason]).
loop()->
receive
#'basic.consume_ok'{} ->
loop();
{#'basic.deliver'{}, Msg} ->
#amqp_msg{payload = Payload} = Msg,
Value=loop2(Payload),
Value
after 200->
io:format("timeout")
end.`
