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|
-module(timed_caches_manager).
-behavior(gen_server).
%%%% gen_server exports
-export(
[
init/1,
handle_cast/2,
handle_call/3,
terminate/2,
code_change/3,
format_status/2,
handle_info/2
]
).
%%%% actual interface
-export(
[
add_cache/3,
inherit_cache/3,
delete_cache/2
]
)
.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% LOCAL %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%% Manager %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
delete_cache (DB) ->
ets:delete(DB).
add_cache (DB, Heir) ->
ets:new(
DB,
[
set,
public,
{keypos, 1},
{read_concurrency, true},
{heir, Heir, DB}
]
).
delete_cache (CacheList, DB) ->
case lists:member(DB, CacheList) of
true ->
delete_cache(DB),
lists:delete(DB, CacheList);
false ->
CacheList
end.
add_cache (CacheList, DB, Heir) ->
case lists:member(DB, CacheList) of
true ->
ets:setopts(DB, {heir, Heir, DB}),
CacheList;
false ->
add_cache(DB, Heir),
[DB|CacheList]
end.
inherit_cache (CacheList, DB, Heir) ->
case lists:member(DB, CacheList) of
true ->
ets:setopts(DB, {heir, Heir, DB}),
CacheList;
false ->
[DB|CacheList]
end.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXPORTED %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%% gen_server
init (CacheList) ->
{ok,CacheList}.
handle_call ({delete, CacheName}, _Caller, State) ->
{noreply, delete_cache(State, CacheName)};
handle_call ({add, CacheName, Heir}, _Caller, State)->
{noreply, add_cache(State, CacheName, Heir)};
handle_call ({inherit, CacheName, Heir}, _Caller, State)->
{noreply, inherit_cache(State, CacheName, Heir)};
handle_call (terminate, _, State) ->
{stop, normal, State}.
handle_cast ({delete, CacheName}, State) ->
{noreply, delete_cache(State, CacheName)};
handle_cast ({add, CacheName, Heir}, State)->
{noreply, add_cache(State, CacheName, Heir)};
handle_cast ({inherit, CacheName, Heir}, State)->
{noreply, inherit_cache(State, CacheName, Heir)};
handle_cast (terminate, State) ->
{stop, normal, State}.
terminate (_Reason, []) ->
ok;
terminate (Reason, [CacheName|OtherCaches]) ->
delete_cache(CacheName),
terminate(Reason, OtherCaches).
code_change (_, State, _) ->
{ok, State}.
format_status (_, [_, State]) ->
[{data, [{"State", State}]}].
handle_info(_, State) ->
{noreply, State}.
|
