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eventstore
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Event store using PostgreSQL for persistence.
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Files
lib/event_store/subscriptions.ex
defmodule EventStore.Subscriptions do
@moduledoc false
alias EventStore.Subscriptions
@all_stream "$all"
def subscribe_to_stream(stream_uuid, subscription_name, subscriber, opts \\ [])
def subscribe_to_stream(stream_uuid, subscription_name, subscriber, opts) do
do_subscribe_to_stream(stream_uuid, subscription_name, subscriber, opts)
end
def subscribe_to_all_streams(subscription_name, subscriber, opts \\ [])
def subscribe_to_all_streams(subscription_name, subscriber, opts) do
do_subscribe_to_stream(@all_stream, subscription_name, subscriber, opts)
end
def unsubscribe_from_stream(stream_uuid, subscription_name) do
do_unsubscribe_from_stream(stream_uuid, subscription_name)
end
def unsubscribe_from_all_streams(subscription_name) do
do_unsubscribe_from_stream(@all_stream, subscription_name)
end
defp do_subscribe_to_stream(stream_uuid, subscription_name, subscriber, opts) do
case Subscriptions.Supervisor.subscribe_to_stream(
stream_uuid,
subscription_name,
subscriber,
opts
) do
{:ok, subscription} ->
{:ok, subscription}
{:error, {:already_started, _subscription}} ->
{:error, :subscription_already_exists}
end
end
defp do_unsubscribe_from_stream(stream_uuid, subscription_name) do
Subscriptions.Supervisor.unsubscribe_from_stream(stream_uuid, subscription_name)
end
end