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eventstore
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Event store using PostgreSQL for persistence.
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lib/event_store/supervisor.ex
defmodule EventStore.Supervisor do
@moduledoc false
use Supervisor
alias EventStore.{
AdvisoryLocks,
Config,
MonitoredServer,
Notifications,
Registration,
Subscriptions
}
@doc """
Starts the event store supervisor.
"""
def start_link(event_store, otp_app, serializer, registry, name, opts) do
Supervisor.start_link(
__MODULE__,
{event_store, otp_app, serializer, registry, name, opts},
name: name
)
end
@doc """
Retrieves the compile time configuration.
"""
def compile_config(event_store, opts) do
otp_app = Keyword.fetch!(opts, :otp_app)
config = Config.get(event_store, otp_app)
{otp_app, config}
end
@doc """
Retrieves the runtime configuration.
"""
def runtime_config(event_store, otp_app, opts) do
config =
Application.get_env(otp_app, event_store, [])
|> Keyword.merge(opts)
|> Keyword.put(:otp_app, otp_app)
case event_store_init(event_store, config) do
{:ok, config} ->
config = Config.parse(config)
{:ok, config}
:ignore ->
:ignore
end
end
## Supervisor callbacks
@doc false
def init({event_store, otp_app, serializer, registry, name, opts}) do
case runtime_config(event_store, otp_app, opts) do
{:ok, config} ->
advisory_locks_name = Module.concat([name, AdvisoryLocks])
advisory_locks_postgrex_name = Module.concat([advisory_locks_name, Postgrex])
subscriptions_name = Module.concat([name, Subscriptions.Supervisor])
subscriptions_registry_name = Module.concat([name, Subscriptions.Registry])
children =
[
{Postgrex, Config.postgrex_opts(config, name)},
MonitoredServer.child_spec(
mfa: {Postgrex, :start_link, [Config.sync_connect_postgrex_opts(config)]},
name: advisory_locks_postgrex_name
),
{AdvisoryLocks, conn: advisory_locks_postgrex_name, name: advisory_locks_name},
{Subscriptions.Supervisor, name: subscriptions_name},
Supervisor.child_spec(
{Registry, keys: :unique, name: subscriptions_registry_name},
id: subscriptions_registry_name
),
{Highlander, {Notifications.Supervisor, {name, registry, serializer, config}}}
] ++ Registration.child_spec(name, registry)
Supervisor.init(children, strategy: :one_for_all)
:ignore ->
:ignore
end
end
## Private helpers
defp event_store_init(event_store, config) do
if Code.ensure_loaded?(event_store) and function_exported?(event_store, :init, 1) do
event_store.init(config)
else
{:ok, config}
end
end
end