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@vysakh0
Last active February 19, 2016 14:04
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The Process that retries itself without monitor, supervisors.
defmodule Hydra do
use GenServer
def run(data) do
{:ok, pid} = GenServer.start(__MODULE__, data, [])
GenServer.cast(pid, :process)
end
def init(data) do
{:ok, data}
end
def process(pid) do
GenServer.cast(pid, :process)
end
def handle_cast(:process, {url, retry} = all) do
if retry !== 0, do: IO.puts "Retrying... #{retry} time"
url |> fetch_data |> save_data
{:noreply, all}
end
def terminate(:normal, _), do: nil
def terminate(:normal, {_url, 3}) do
IO.puts "Tried 3 times. No luck :( "
end
def terminate(_, {url, retry}) do
run({url, retry + 1})
end
defp fetch_data(url) do
IO.puts "Requesting API for #{url}"
1/0
"data"
end
defp save_data(data) do
IO.puts "Storing the data to remote database: #{data}"
Process.exit(self, :normal)
end
end
Hydra.run({"/api/users", 0})
Hydra.run({"/api/posts", 0})
Hydra.run({"/api/comments", 0})
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