I'm using a cache, to fetch and save data from 3rd party data integartor
server. I have written an app for this purpose and it is working perfectly.
It fetches the latest data from the server at specified intervals and
writes to ETS for the time being. I have a util module that fetches the
latest data from the cache and dispalys it.
In the util:
--------------------
read_record(UserId) ->
case gen_server:call(my_cache, {reading, UserId}) of %Works fine%
{error, not_found} ->
jsx:encode([{ok, not_found}]);
{ok, Reading} ->
io:format("For the user : ~n~p~n",[UserId]),
io:format("The Latest Readings are : ~n~p~n",[Reading])
end.
-----------------------------
In my_cache I have:
-----------------------
handle_call({reading, UserId}, _From, #state{user_id=UserId,
last_reading=_, last_status=_}) ->
case my_reading(UserId) of %call the function that looks up ETS with
UserId%
{error, not_found} ->
{reply, {error, not_found}, #state{user_id=undefined,
last_reading=undefined, last_status=not_found}};
{ok, Reading} ->
{reply, {ok, Reading}, #state{user_id=UserId, last_reading=Reading,
last_status=ok}}
end;
------------------------
So far so good. My application works perfectly. I also have another cache
my_ws_cache which is wroking fine.
Now I'm calling the same cache from a Websocket.
----------------------------
handle_incoming(ServiceName, WebSocketId, Message, State) ->
error_logger:info_msg("Incoming Message: ~p~n",
[binary_to_list(Message)]),
[Email, UniqueId] = string:tokens(binary_to_list(Message), ":"),
case lists:member(my_sup, erlang:registered()) of
true ->
gen_server:call(my_ws_cache, {savewspidoremail, UniqueId,
WebSocketId, Email})
end,
UserKey = Email ++ "-" ++ ?MYCALL1,
case lists:member(my_sup, erlang:registered()) of
true ->
case gen_server:call(my_cache, {reading, UserKey}) of %this
line raises case_clause error%
{error, not_found} ->
WebSocketId ! {text, "No Data for User"};
{ok, Reading} ->
WebSocketId ! {text, Reading}
end;
false ->
WebSocketId ! {text, "Error Connecting My Sup"}
end,
{noreply, State}.
---------------------------------
And here when I try to connect my_cache from Websocket I get the
case_clause error:
---------------------------------
10:22:28.455 [error] ** Boss Service Handler myapp_priv_my_websocket
terminating in handle_incoming/4
for the reason error:{case_clause,ok}
ServiceUrl: "/websocket/myapp"
WebSocketId: <0.364.0>
SessionId : <<"61472263246cb7f4b321e997ad47ba8e523a36ac">>
Message : <<"[email protected]:Z4cmlu0JdtyDIaACnIjRmiKDP5LtF7SB">>
State : []
** Stacktrace:
[{my_priv_my_websocket,handle_incoming,5,[{file,"/Users/T316538/Documents/beluga_priv/src/websocket/app_priv_my_websocket.erl"},{line,120}]},{boss_service_worker,handle_cast,2,[{file,"src/boss/boss_service_worker.erl"},{line,173}]},{gen_server,handle_msg,5,[{file,"gen_server.erl"},{line,599}]},{proc_lib,init_p_do_apply,3,[{file,"proc_lib.erl"},{line,239}]}]
------------------------------------------------
Why I'm getting {case_clause, ok} error? Any suggestion would be highly
appreciated.
Thanking you all in advance.
--
You received this message because you are subscribed to the Google Groups
"ChicagoBoss" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
Visit this group at http://groups.google.com/group/chicagoboss.
To view this discussion on the web visit
https://groups.google.com/d/msgid/chicagoboss/1b30247e-b93f-4db9-bdf4-d2c5a34aada5%40googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
