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macula
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5.2.0
5.1.0
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4.8.0
4.7.1
4.7.0
4.6.0
4.5.0
4.4.10
4.4.9
4.4.8
4.4.7
4.4.6
4.4.5
4.4.4
4.4.3
4.4.2
4.4.1
4.4.0
4.3.1
4.3.0
4.2.9
4.2.8
4.2.7
4.2.6
4.2.5
4.2.4
4.2.3
4.2.2
4.2.1
4.2.0
4.1.1
4.1.0
4.0.0
3.16.0
3.15.3
3.15.2
3.15.1
3.14.0
3.13.0
3.12.1
3.12.0
3.11.1
3.11.0
3.10.3
3.10.2
3.10.1
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3.3.0
3.2.0
3.1.0
3.0.0
2.1.1
2.1.0
2.0.0
1.5.2
1.5.1
1.4.30
1.4.29
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1.4.16
1.4.15
1.4.14
1.4.13
1.4.11
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1.4.9
1.4.8
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1.4.6
1.4.5
1.4.4
1.4.3
1.4.2
1.4.1
1.4.0
1.3.1
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1.0.10
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1.0.5
1.0.4
1.0.3
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1.0.1
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0.48.6
0.48.5
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0.48.3
0.48.2
0.48.1
0.48.0
0.47.1
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0.46.3
0.46.1
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0.44.1
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0.43.3
0.43.2
0.43.1
0.43.0
0.42.9
0.42.8
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0.42.6
0.42.5
0.42.4
0.42.3
0.42.2
0.42.1
0.42.0
0.41.1
0.41.0
0.40.1
0.40.0
0.39.9
0.39.8
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0.39.6
0.39.5
0.39.4
0.39.3
0.39.2
0.39.1
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0.38.8
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0.38.6
0.38.5
0.38.4
0.38.3
0.38.2
0.38.1
0.38.0
0.37.7
0.37.6
0.37.5
0.37.4
0.37.3
0.37.2
0.37.1
0.37.0
0.36.6
0.36.5
0.36.4
0.36.3
0.36.2
0.36.1
0.36.0
0.35.4
0.35.3
0.35.2
0.35.1
0.35.0
0.34.1
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0.33.1
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0.32.5
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0.32.2
0.32.1
0.32.0
0.31.9
0.31.8
0.31.7
0.31.6
0.31.5
0.31.4
0.31.3
0.31.2
0.31.1
0.31.0
0.30.10
0.30.9
0.30.8
0.30.7
0.30.6
0.30.5
0.30.4
0.30.3
0.30.2
0.30.1
0.30.0
0.29.0
0.28.3
0.28.2
0.28.1
0.28.0
0.27.1
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0.26.1
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0.25.6
0.25.5
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0.25.1
0.25.0
0.24.6
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0.24.3
0.24.2
0.24.1
0.24.0
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0.22.12
0.22.11
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0.22.6
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0.22.0
0.21.7
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0.20.25
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0.20.0
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0.19.1
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0.18.1
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0.17.4
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0.16.0
0.15.1
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0.14.3
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0.14.1
0.14.0
0.12.6
0.12.5
0.12.3
0.11.3
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0.10.1
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0.9.2
0.9.1
0.9.0
0.8.25
0.8.24
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0.8.21
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0.8.9
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0.4.4
0.4.3
0.4.2
0.4.1
0.4.0
0.3.4
0.3.3
0.3.2
0.3.1
Macula HTTP/3 Mesh SDK — connect, subscribe, publish, call, advertise
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Files
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Files
src/macula_pubsub_system/macula_pubsub_cache.erl
%%%-------------------------------------------------------------------
%%% @doc
%%% LRU cache for remote subscriber lists.
%%% Caches DHT query results to avoid repeated lookups.
%%% Wraps macula_cache with subscriber-specific logic.
%%% @end
%%%-------------------------------------------------------------------
-module(macula_pubsub_cache).
%% API
-export([
new/1,
put/3,
put_with_timestamp/4,
get/2,
invalidate/2,
clear/1,
is_expired/3,
size/1,
max_size/1
]).
%% Types
-type cache() :: macula_cache:cache().
-export_type([cache/0]).
%%%===================================================================
%%% API Functions
%%%===================================================================
%% @doc Create new cache with max size.
-spec new(pos_integer()) -> cache().
new(MaxSize) ->
macula_cache:new(MaxSize).
%% @doc Put entry in cache.
-spec put(cache(), binary(), [map()]) -> cache().
put(Cache, Pattern, Subscribers) ->
Timestamp = erlang:system_time(millisecond),
put_with_timestamp(Cache, Pattern, Subscribers, Timestamp).
%% @doc Put entry with custom timestamp (for testing).
-spec put_with_timestamp(cache(), binary(), [map()], integer()) -> cache().
put_with_timestamp(Cache, Pattern, Subscribers, Timestamp) ->
macula_cache:put(Cache, Pattern, Subscribers, Timestamp).
%% @doc Get entry from cache.
%% Returns {ok, Subscribers, UpdatedCache} or not_found.
%% The updated cache has the entry moved to front (LRU).
-spec get(cache(), binary()) -> {ok, [map()], cache()} | not_found.
get(Cache, Pattern) ->
macula_cache:get(Cache, Pattern).
%% @doc Invalidate (remove) entry.
-spec invalidate(cache(), binary()) -> cache().
invalidate(Cache, Pattern) ->
macula_cache:remove(Cache, Pattern).
%% @doc Clear all entries.
-spec clear(cache()) -> cache().
clear(Cache) ->
macula_cache:clear(Cache).
%% @doc Check if entry is expired based on TTL.
%% This checks if entry exists and its age exceeds TTL.
-spec is_expired(cache(), binary(), pos_integer()) -> boolean().
is_expired(Cache, Pattern, TTL) ->
case macula_cache:get(Cache, Pattern) of
{ok, _Subscribers, UpdatedCache} ->
%% Get the entry's timestamp
case get_entry_timestamp(UpdatedCache, Pattern) of
{ok, Timestamp} ->
Now = erlang:system_time(millisecond),
Age = Now - Timestamp,
Age > (TTL * 1000); % TTL in seconds, Age in milliseconds
not_found ->
true % Should not happen, but treat as expired
end;
not_found ->
true % Missing entry is considered expired
end.
%% @doc Get number of entries.
-spec size(cache()) -> non_neg_integer().
size(Cache) ->
macula_cache:size(Cache).
%% @doc Get max size.
-spec max_size(cache()) -> pos_integer().
max_size(Cache) ->
macula_cache:max_size(Cache).
%%%===================================================================
%%% Internal Functions
%%%===================================================================
%% @doc Get timestamp of entry (internal helper for is_expired).
-spec get_entry_timestamp(cache(), binary()) -> {ok, integer()} | not_found.
get_entry_timestamp(#{entries := Entries}, Pattern) ->
case lists:search(fun(E) -> maps:get(key, E) =:= Pattern end, Entries) of
{value, Entry} ->
{ok, maps:get(timestamp, Entry)};
false ->
not_found
end.