[erlang-questions] gen_server:call and hibernate

[ag3nt911]

Ulf,

Thanks! indeed, the gen_server:call is quite simple. I should have traced it
and saw it for myself. Initially i thought a gen_server:cast would make more
sense to use but what I couldn't grasp is why facebook developers would
prefer gen_server:call over gen_server;cast instead. Is there any catch to
using a method where:

TimerRef = erlang:start_timer(60000, self(), {timedout, Data}),
%% gen_server:call(ServerPid, {message, SomeData}),
Ref = erlang:monitor(process, ServerPid),
ServerPid ! {call, {self(), Ref}, SomeData}, 
proc_lib:hibernate(?MODULE, func, [TimerRef]).

as opposed to:

TimerRef = erlang:start_timer(60000, self(), {timedout, Data}),
gen_server:cast(ServerPid, {message, SomeData}),
proc_lib:hibernate(?MODULE, func, [TimerRef]).



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