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| dmitryme |
 Posted: Tue Jul 28, 2009 6:42 pm |
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Joined: 21 Jan 2009
Posts: 3
Location: Russia
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Is it possible to call get_server:call({global, some_reg_process}, some_data) inside client spawn receive end block loop. E.g.:
Code:
start() ->
register(client, spawn(?MODULE, loop, []),
client ! hello.
loop() ->
receive
hello -> Res = gen_server:call({global, some_server}, hello),
io:format("~p~n", [Res]),
loop();
stop -> unregister(client)
end.
Server is very simple:
Code:
handle_call(hello, {Pid, _}, State) ->
{reply, hello_response, State}.
My client silently die, w/o any error. At least I don't see any registered process as 'client'. If send hello not from spawned process all work fine. Client and server run on different computers.
[/code] |
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| Michal Ptaszek |
| Posted: Fri Aug 07, 2009 1:37 pm |
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User
Joined: 01 May 2008
Posts: 35
Location: Krakow
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Do your nodes see one another?
Check if you have your server node among nodes() at the client node (if not, check if the nodes share the same cookie set and try to connect them by invoking net_adm:ping(server_node@some_host)). |
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| Mazen |
| Posted: Mon Aug 10, 2009 5:56 am |
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User
Joined: 20 Jul 2006
Posts: 164
Location: London
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Tip:
It helps if you use spawn_link and do application:start(sasl). It will give you more information.
You should also return the Pid of the process you spawn and then do erlang:is_process_alive/1 and erlang:process_info/1 to get more info about the process you spawned. Also try erlang:whereis(RegisteredName). where RegisteredName in your case would be: client
if you want to trace the messages that the process receive then do the following in the shell after you get the pid:
Code:
dbg:tracer().
dbg:p(Pid, [r]).
this will give you all traces on incoming messages to the process Pid (see http://www.erlang.org/doc/man/dbg.html function p/2). You can turn it of by calling
Also make sure that loop/0 in your module is exported.
Anyway.... to answer your original question: Yes, you can do gen_server:call/2 in a receive statement.
Good luck.
/Mazz |
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| baryluk |
| Posted: Tue Aug 18, 2009 10:11 am |
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User
Joined: 05 Aug 2009
Posts: 48
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| If you are registering as {global, atom()}, remember to have nodes see each other, befor you are starting gen_server. |
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| wuji |
| Posted: Tue Sep 11, 2012 3:39 am |
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User
Joined: 10 Aug 2012
Posts: 654
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