137 lines
5.0 KiB
Erlang
137 lines
5.0 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% @author anlicheng
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%%% @copyright (C) 2025, <COMPANY>
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%%% @doc
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%%%
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%%% @end
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%%% Created : 09. 5月 2025 16:45
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%%%-------------------------------------------------------------------
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-module(efka_inetd_task_log).
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-author("anlicheng").
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-behaviour(gen_server).
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%% API
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-export([start_link/0]).
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-export([stash/2, flush/1, get_logs/1]).
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%% gen_server callbacks
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-export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2, code_change/3]).
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-define(SERVER, ?MODULE).
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-record(state, {
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%% #{task_id => queue:new()}
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pending_map = #{}
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}).
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%%%===================================================================
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%%% API
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%%%===================================================================
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-spec stash(TaskId :: integer(), Items :: binary() | [binary()]) -> no_return().
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stash(TaskId, Log) when is_integer(TaskId), is_binary(Log) ->
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stash(TaskId, [Log]);
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stash(TaskId, Items) when is_integer(TaskId), is_list(Items) ->
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{{Y, M, D}, {H, I, S}} = calendar:local_time(),
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TimePrefix = iolist_to_binary(io_lib:format("[~b-~2..0b-~2..0b ~2..0b:~2..0b:~2..0b]", [Y, M, D, H, I, S])),
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Log = iolist_to_binary([TimePrefix, <<" ">>, lists:join(<<" ">>, Items)]),
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gen_server:cast(?SERVER, {stash, TaskId, Log}).
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-spec flush(TaskId :: integer()) -> no_return().
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flush(TaskId) when is_integer(TaskId) ->
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gen_server:cast(?SERVER, {flush, TaskId}).
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-spec get_logs(TaskId :: integer()) -> {ok, Logs :: list()}.
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get_logs(TaskId) when is_integer(TaskId) ->
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gen_server:call(?SERVER, {get_logs, TaskId}).
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%% @doc Spawns the server and registers the local name (unique)
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-spec(start_link() ->
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{ok, Pid :: pid()} | ignore | {error, Reason :: term()}).
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start_link() ->
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gen_server:start_link({local, ?SERVER}, ?MODULE, [], []).
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%%%===================================================================
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%%% gen_server callbacks
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%%%===================================================================
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%% @private
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%% @doc Initializes the server
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-spec(init(Args :: term()) ->
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{ok, State :: #state{}} | {ok, State :: #state{}, timeout() | hibernate} |
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{stop, Reason :: term()} | ignore).
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init([]) ->
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{ok, #state{}}.
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%% @private
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%% @doc Handling call messages
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-spec(handle_call(Request :: term(), From :: {pid(), Tag :: term()},
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State :: #state{}) ->
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{reply, Reply :: term(), NewState :: #state{}} |
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{reply, Reply :: term(), NewState :: #state{}, timeout() | hibernate} |
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{noreply, NewState :: #state{}} |
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{noreply, NewState :: #state{}, timeout() | hibernate} |
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{stop, Reason :: term(), Reply :: term(), NewState :: #state{}} |
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{stop, Reason :: term(), NewState :: #state{}}).
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handle_call({get_logs, TaskId}, _From, State = #state{pending_map = PendingMap}) ->
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case maps:find(TaskId, PendingMap) of
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error ->
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Logs = task_log_model:get_logs(TaskId),
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{reply, {ok, Logs}, State};
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{ok, Q} ->
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Logs = queue:to_list(Q),
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{reply, {ok, Logs}, State}
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end.
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%% @private
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%% @doc Handling cast messages
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-spec(handle_cast(Request :: term(), State :: #state{}) ->
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{noreply, NewState :: #state{}} |
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{noreply, NewState :: #state{}, timeout() | hibernate} |
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{stop, Reason :: term(), NewState :: #state{}}).
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handle_cast({stash, TaskId, Log}, State = #state{pending_map = PendingMap}) ->
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Q = maps:get(TaskId, PendingMap, queue:new()),
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NQ = queue:in(Log, Q),
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{noreply, State#state{pending_map = maps:put(TaskId, NQ, PendingMap)}};
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handle_cast({flush, TaskId}, State = #state{pending_map = PendingMap}) ->
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case maps:take(TaskId, PendingMap) of
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error ->
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{noreply, State};
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{Q, NPendingMap} ->
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Logs = queue:to_list(Q),
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ok = task_log_model:insert(TaskId, Logs),
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{noreply, State#state{pending_map = NPendingMap}}
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end.
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%% @private
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%% @doc Handling all non call/cast messages
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-spec(handle_info(Info :: timeout() | term(), State :: #state{}) ->
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{noreply, NewState :: #state{}} |
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{noreply, NewState :: #state{}, timeout() | hibernate} |
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{stop, Reason :: term(), NewState :: #state{}}).
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handle_info(_Info, State = #state{}) ->
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{noreply, State}.
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%% @private
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%% @doc This function is called by a gen_server when it is about to
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%% terminate. It should be the opposite of Module:init/1 and do any
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%% necessary cleaning up. When it returns, the gen_server terminates
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%% with Reason. The return value is ignored.
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-spec(terminate(Reason :: (normal | shutdown | {shutdown, term()} | term()),
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State :: #state{}) -> term()).
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terminate(_Reason, _State = #state{}) ->
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ok.
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%% @private
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%% @doc Convert process state when code is changed
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-spec(code_change(OldVsn :: term() | {down, term()}, State :: #state{},
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Extra :: term()) ->
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{ok, NewState :: #state{}} | {error, Reason :: term()}).
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code_change(_OldVsn, State = #state{}, _Extra) ->
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{ok, State}.
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%%%===================================================================
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%%% Internal functions
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%%%===================================================================
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