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diint_utilites_common_app

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библиотеки для работы с ребитом и протоколы

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diint_utilites_common_app src log file_logger_handler.erl
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src/log/file_logger_handler.erl 

-module(file_logger_handler).

-include("include/types_rabbit.hrl").

-include_lib("kernel/include/logger.hrl").



-export([adding_handler/1, removing_handler/1, log/2]).

-export([init/1, handle_call/3, handle_cast/2, terminate/2]).







adding_handler(Config) ->

    MyConfig = maps:get(config,Config),

    {ok, Pid} = gen_server:start(?MODULE, MyConfig, []),

    {ok, Config#{config => MyConfig#{pid => Pid}}}.



init(#{logFolder := LogFolder}) ->

{ok,#{fileD => [], logFolder => LogFolder}}.



removing_handler(#{config := #{pid := Pid}}) ->

    gen_server:stop(Pid).



terminate(_Reason, #{fileD := FileDescriptors}) ->

    _ = closeFD(FileDescriptors),

    ok.



log(LogEvent,#{config := #{pid := Pid}} = Config) ->

    gen_server:cast(Pid, {log, LogEvent, Config}).



handle_cast({log, LogEvent = #{meta := #{mfa := {MODULE, _FUNCTION_NAME, _FUNCTION_ARITY}}}, Config}, #{logFolder := LogFolder, fileD := FileDescriptors} = State) ->

    FilePath = string:join([LogFolder,MODULE],"/"),

    case find_fd(FileDescriptors,FilePath) of

        none -> NewFD = open_new_fd(FilePath),

        NewFDL = lists:append(FileDescriptors,[{FilePath,NewFD}]),

        do_log(NewFD,LogEvent,Config),

        {noreply, State#{fileD => NewFDL}};

        Fd -> 

            do_log(Fd,LogEvent,Config),

            {noreply, State}

    end.



handle_call(_, _, State) ->

    {reply, {error, bad_request}, State}.



find_fd([], _Name) -> none;

find_fd([{Name,Fd}|_FileDescriptors], Name) ->

    Fd;

find_fd([_|FileDescriptors], Name) ->

find_fd(FileDescriptors,Name).





open_new_fd(File) ->

    {ok, Fd} = file:open(File, [append, {encoding, utf8}]),

    Fd.





do_log(Fd, LogEvent, #{formatter := {FModule, FConfig}}) ->

    String = FModule:format(LogEvent, FConfig),

    io:put_chars(Fd, String).



closeFD([]) -> ok;

closeFD([{_Name,Fd}|FileDescriptors]) ->

    file:close(Fd),

    closeFD(FileDescriptors).