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-module(mod_pubsub_cache_backend). |
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-export([start/2, |
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stop/1, |
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upsert_last_item/5, |
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delete_last_item/2, |
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get_last_item/2]). |
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-ignore_xref([stop/1]). |
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-define(MAIN_MODULE, mod_pubsub_cache). |
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%%==================================================================== |
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%% Behaviour callbacks |
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%%==================================================================== |
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%% ------------------------ Backend start/stop ------------------------ |
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-callback start(jid:lserver()) -> ok. |
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-callback stop() -> ok. |
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-callback upsert_last_item(ServerHost :: binary(), |
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Nidx :: mod_pubsub:nodeIdx(), |
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ItemID :: mod_pubsub:itemId(), |
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Publisher :: jid:jid(), |
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Payload :: mod_pubsub:payload()) -> ok | {error, Reason :: term()}. |
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-callback delete_last_item(ServerHost :: binary(), |
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Nidx :: mod_pubsub:nodeIdx()) -> ok | {error, Reason :: term()}. |
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-callback get_last_item(ServerHost :: binary(), |
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Nidx :: mod_pubsub:nodeIdx()) -> |
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{ok, LastItem :: mod_pubsub:pubsubLastItem()} | {error, Reason :: term()}. |
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-spec start(jid:lserver(), gen_mod:module_opts()) -> ok. |
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start(ServerHost, Opts = #{last_item_cache := CacheBackend}) -> |
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% mongoose_backend extracts the "backend" option, but the cache backend is under the "last_item_cache" key |
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% the "backend" from Opts relates to the backend for mod_pubsub |
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:-( |
OptsWithBackend = Opts#{backend => CacheBackend}, |
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:-( |
TrackedFuns = [upsert_last_item, delete_last_item, get_last_item], |
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:-( |
mongoose_backend:init(ServerHost, ?MAIN_MODULE, TrackedFuns, OptsWithBackend), |
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:-( |
Args = [ServerHost], |
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:-( |
mongoose_backend:call(ServerHost, ?MAIN_MODULE, ?FUNCTION_NAME, Args). |
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-spec stop(jid:lserver()) -> ok. |
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stop(ServerHost) -> |
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:-( |
mongoose_backend:call(ServerHost, ?MAIN_MODULE, ?FUNCTION_NAME, []). |
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-spec upsert_last_item(ServerHost :: binary(), |
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Nidx :: mod_pubsub:nodeIdx(), |
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ItemID :: mod_pubsub:itemId(), |
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Publisher :: jid:jid(), |
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Payload :: mod_pubsub:payload()) -> ok | {error, Reason :: term()}. |
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upsert_last_item(ServerHost, Nidx, ItemID, Publisher, Payload) -> |
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:-( |
Args = [ServerHost, Nidx, ItemID, Publisher, Payload], |
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:-( |
mongoose_backend:call_tracked(ServerHost, ?MAIN_MODULE, ?FUNCTION_NAME, Args). |
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-spec delete_last_item(ServerHost :: binary(), |
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Nidx :: mod_pubsub:nodeIdx()) -> ok | {error, Reason :: term()}. |
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delete_last_item(ServerHost, Nidx) -> |
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:-( |
Args = [ServerHost, Nidx], |
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:-( |
mongoose_backend:call_tracked(ServerHost, ?MAIN_MODULE, ?FUNCTION_NAME, Args). |
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-spec get_last_item(ServerHost :: binary(), |
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Nidx :: mod_pubsub:nodeIdx()) -> |
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{ok, LastItem :: mod_pubsub:pubsubLastItem()} | {error, Reason :: term()}. |
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get_last_item(ServerHost, Nidx) -> |
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:-( |
Args = [ServerHost, Nidx], |
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:-( |
mongoose_backend:call_tracked(ServerHost, ?MAIN_MODULE, ?FUNCTION_NAME, Args). |