"[Erl_Question00]:gen_server:reply/2
---
genserver:reply/2
reply(Client, Reply) –> Result
Types:
Client - see below
Reply =
term()
Result = term()
This function can be
used by a gen
server to explicitly send a reply to a client that called call/2,3 or
multicall/2,3,4, when the reply cannot be defined in the return value of
Module:handlecall/3.
Client must be the From argument provided to
the callback function. Reply is an arbitrary term, which will be given back to
the client as the return value of call/2,3 or multicall/2,3,4.
The
return value Result is not further defined, and should always be ignored.
Result :
if exchange the
timer:sleep(3000) and timer:sleep(1000) the Result will be "gen
server:reply"
so the from process only receive the fast reply ,but
the genserver will execute both!
Why?
genserver:reply/2
design as :
