129 lines
4.8 KiB
Erlang
129 lines
4.8 KiB
Erlang
%%%-------------------------------------------------------------------
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%%% @author anlicheng
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%%% @copyright (C) 2024, <COMPANY>
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%%% @doc
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%%%
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%%% @end
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%%% Created : 07. 5月 2024 10:30
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%%%-------------------------------------------------------------------
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-module(endpoint_timer).
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-author("anlicheng").
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-include("endpoint.hrl").
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-behaviour(gen_server).
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%% API
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-export([start_link/1]).
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-export([task/3, ack/2, cleanup/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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-record(state, {
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retry_interval = 0,
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%% 定时器
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timer_map = #{}
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}).
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%%%===================================================================
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%%% API
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%%%===================================================================
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task(Pid, Id, Task) when is_pid(Pid), is_integer(Id), is_function(Task, 0) ->
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gen_server:cast(Pid, {task, Id, Task}).
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ack(Pid, Id) when is_pid(Pid), is_integer(Id) ->
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gen_server:cast(Pid, {ack, Id}).
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cleanup(Pid) when is_pid(Pid) ->
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gen_server:cast(Pid, cleanup).
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%% @doc Spawns the server and registers the local name (unique)
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-spec(start_link(RetryInterval :: integer()) ->
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{ok, Pid :: pid()} | ignore | {error, Reason :: term()}).
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start_link(RetryInterval) when is_integer(RetryInterval) ->
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gen_server:start_link(?MODULE, [RetryInterval], []).
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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([RetryInterval]) ->
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{ok, #state{retry_interval = RetryInterval}}.
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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(_Request, _From, State = #state{}) ->
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{reply, ok, State}.
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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({task, Id, Task}, State = #state{retry_interval = RetryInterval, timer_map = TimerMap}) ->
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TimerRef = erlang:start_timer(RetryInterval, self(), {repost_ticker, {Id, Task}}),
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{noreply, State#state{timer_map = maps:put(Id, TimerRef, TimerMap)}};
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%% 取消
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handle_cast({ack, Id}, State = #state{timer_map = TimerMap}) ->
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case maps:take(Id, TimerMap) of
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error ->
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{noreply, State};
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{TimerRef, NTimerMap} ->
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is_reference(TimerRef) andalso erlang:cancel_timer(TimerRef),
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{noreply, State#state{timer_map = NTimerMap}}
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end;
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handle_cast(cleanup, State = #state{timer_map = TimerMap}) ->
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lists:foreach(fun({_, TimerRef}) -> catch erlang:cancel_timer(TimerRef) end, maps:to_list(TimerMap)),
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{noreply, State#state{timer_map = #{}}}.
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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({timeout, _, {repost_ticker, {Id, Task}}}, State = #state{retry_interval = RetryInterval, timer_map = TimerMap}) ->
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Task(),
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TimerRef = erlang:start_timer(RetryInterval, self(), {repost_ticker, {Id, Task}}),
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{noreply, State#state{timer_map = maps:put(Id, TimerRef, TimerMap)}}.
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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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