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%% @doc Backend module for mod_jingle_sip for CETS backend |
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-module(mod_jingle_sip_cets). |
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-behaviour(mod_jingle_sip_backend). |
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-include("mongoose.hrl"). |
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-export([init/2]). |
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-export([read_session/1]). |
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-export([write_new_session/2]). |
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-export([update_session/2]). |
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-export([remove_session/1]). |
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-type call_id() :: mod_jingle_sip_session:call_id(). |
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-type session() :: mod_jingle_sip_session:session(). |
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-type update_fun() :: mod_jingle_sip_session:update_fun(). |
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-define(TABLE, cets_jingle_sip_session). |
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-spec init(mongooseim:host_type(), gen_mod:module_opts()) -> ok. |
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init(_Host, _Opts) -> |
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%% We store Erlang records, so keypos is 2 |
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cets:start(?TABLE, #{keypos => 2}), |
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cets_discovery:add_table(mongoose_cets_discovery, ?TABLE). |
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-spec read_session(call_id()) -> [session()]. |
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read_session(CallID) -> |
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ets:lookup(?TABLE, CallID). |
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-spec write_new_session(call_id(), session()) -> |
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ok | {error, conflict}. |
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write_new_session(CallID, Session) -> |
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case read_session(CallID) of |
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[_] -> |
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{error, conflict}; |
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_ -> |
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case cets:insert_new(?TABLE, Session) of |
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true -> |
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ok; |
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false -> |
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{error, conflict} |
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end |
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end. |
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-spec update_session(call_id(), update_fun()) -> ok | {error, _}. |
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update_session(CallID, F) -> |
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case read_session(CallID) of |
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[Session] -> |
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case F(Session) of |
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{error, _} = Err -> Err; |
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Session2 -> cets:insert(?TABLE, Session2) |
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end; |
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_ -> |
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{error, not_found} |
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end. |
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-spec remove_session(call_id()) -> ok. |
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remove_session(CallID) -> |
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cets:delete(?TABLE, CallID). |