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ex_esdb
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ExESDB is a reincarnation of rabbitmq/khepri, specialized for use as a BEAM-native event store.
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lib/ex_esdb/emitter_pool.ex
defmodule ExESDB.EmitterPool do
@moduledoc """
As part of the ExESDB.System,
"""
use Supervisor
require Logger
alias ExESDB.Themes, as: Themes
def name(store, sub_topic),
do: :"#{store}:#{sub_topic}_emitter_pool"
def start_link({store, sub_topic, subscriber, pool_size, filter}) do
Supervisor.start_link(
__MODULE__,
{store, sub_topic, subscriber, pool_size, filter},
name: name(store, sub_topic)
)
end
@impl Supervisor
def init({store, sub_topic, subscriber, pool_size, filter}) do
emitter_names =
store
|> :emitter_group.setup_emitter_mechanism(sub_topic, filter, pool_size)
children =
for emitter <- emitter_names do
Supervisor.child_spec(
{ExESDB.EmitterWorker, {store, sub_topic, subscriber, emitter}},
id: emitter
)
end
msg = "for [#{name(store, sub_topic)}] started with #{length(emitter_names)} emitters"
IO.puts("#{Themes.emitter_pool(self(), msg)}")
Supervisor.init(children, strategy: :one_for_one)
end
def stop(store, sub_topic), do: Supervisor.stop(name(store, sub_topic))
end