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gen_server_proxy
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Invokes call, cast or stop with a GenServer registered via a server ID. Will wait a bit if the GenServer is not yet registered on restarts.
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lib/gen_server/proxy/timer.ex
defmodule GenServer.Proxy.Timer do
use PersistConfig
alias GenServer.Proxy.Log
@timeout get_env(:timeout)
@times get_env(:times)
@spec wait(GenServer.name(), term) :: :ok
def wait(server, reason), do: wait(server, reason, @times)
## Private functions
# On restarts, wait if server not yet registered...
@spec wait(GenServer.name(), term, non_neg_integer) :: :ok
defp wait(server, reason, 0) do
remains_unregistered = {server, @timeout, @times, reason, __ENV__}
:ok = Log.warn(:remains_unregistered, remains_unregistered)
end
defp wait(server, reason, times_left) do
Process.sleep(@timeout)
times_left = times_left - 1
case GenServer.whereis(server) do
pid when is_pid(pid) ->
times = @times - times_left
now_registered = {server, @timeout, times, reason, pid, __ENV__}
:ok = Log.info(:now_registered, now_registered)
nil ->
still_unregistered = {server, @timeout, times_left, reason, __ENV__}
:ok = Log.info(:still_unregistered, still_unregistered)
wait(server, reason, times_left)
end
end
end