Packages
ex_esdb
0.1.1
0.11.0
0.10.0
0.9.0
0.8.0
0.7.8
0.7.7
0.7.6
0.7.5
0.7.4
0.7.3
0.7.2
0.7.1
0.7.0
0.6.1
0.6.0
0.5.1
0.5.0
0.4.8
0.4.7
0.4.6
0.4.5
0.4.4
0.4.3
0.4.2
0.4.1
0.4.0
0.3.3
0.3.2
0.3.1
0.3.0
0.2.5
0.2.4
0.2.3
0.2.2
0.2.1
0.2.0
0.1.7
0.1.6
0.1.5
0.1.4
0.1.3
0.1.2
0.1.1
0.1.0
0.0.20
0.0.19
0.0.18
0.0.17
0.0.16
0.0.15
0.0.14-alpha
0.0.13-alpha
0.0.12-alpha
0.0.11-alpha
0.0.10-alpha
0.0.9-alpha
0.0.8-alpha
0.0.6-alpha
0.0.5-alpha
0.0.4-alpha
0.0.3-alpha
0.0.2-alfa
0.0.1-alfa
ExESDB is a reincarnation of rabbitmq/khepri, specialized for use as a BEAM-native event store.
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Files
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Files
src/subscriptions_store.erl
-module(subscriptions_store).
-include_lib("khepri/include/khepri.hrl").
-export([get_subscription/2, put_subscription/2, delete_subscription/2, key/1,
update_subscription/2, exists/2]).
get_subscription(Store, Key) when is_binary(Key) ->
Path = [subscriptions, Key],
get_subscription(Store, Path);
get_subscription(Store, Path) when is_list(Path) ->
case khepri:get(Store, Path) of
{ok, Subscription} ->
Subscription;
{error, _Reason} ->
nil
end.
key(KeyT) when is_tuple(KeyT) ->
integer_to_binary(erlang:phash2(KeyT));
key(Subscription) when is_map(Subscription) ->
#{type := Type,
selector := Selector,
subscription_name := SubscriptionName} =
Subscription,
key({Type, Selector, SubscriptionName}).
-spec exists(atom(), map()) -> boolean().
exists(Store, Subscription) ->
Key = key(Subscription),
khepri:exists(Store, [subscriptions, Key]).
-spec put_subscription(atom(), map()) -> ok.
put_subscription(Store, Subscription) ->
Key = key(Subscription),
case khepri:exists(Store, [subscriptions, Key]) of
true ->
ok = khepri:update(Store, [subscriptions, Key], Subscription),
ok;
false ->
ok = khepri:put(Store, [subscriptions, Key], Subscription),
ok
end.
-spec delete_subscription(atom(), map()) -> ok.
delete_subscription(Store, Subscription) ->
Key = key(Subscription),
case khepri:exists(Store, [subscriptions, Key]) of
true ->
ok = khepri:delete(Store, [subscriptions, Key]),
ok;
false ->
ok
end.
-spec update_subscription(atom(), map()) -> ok.
update_subscription(Store, Subscription) ->
Key = key(Subscription),
case khepri:exists(Store, [subscriptions, Key]) of
true ->
ok = khepri:update(Store, [subscriptions, Key], Subscription),
ok;
false ->
ok = khepri:put(Store, [subscriptions, Key], Subscription),
ok
end.