Mnesia migrations with global lock on startup. Refs EventHub/EventHubBack#24
This commit is contained in:
+270
-272
@@ -1,273 +1,271 @@
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%% ===================================================================
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%% EventHub – infra_mnesia (финальная версия с автоочисткой кластера)
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%% ===================================================================
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-module(infra_mnesia).
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-behaviour(gen_server).
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-include("records.hrl").
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-export([start_link/0, init_tables/0, wait_for_tables/0, wait_for_table/1]).
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-export([add_cluster_nodes/1]).
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-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
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terminate/2, code_change/3]).
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-define(TABLES, [
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user, session, verification, admin, admin_session, auth_session,
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calendar, calendar_share, calendar_specialist,
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event, recurrence_exception,
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booking,
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review, report, banned_word,
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ticket, subscription,
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admin_audit, notification,
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stats, node_metric, schema_migration
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]).
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-define(DISC_TABLES, ?TABLES -- [session, verification, admin_session, node_metric]).
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-define(TABLE_WAIT_TIMEOUT, 5000).
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-define(CLEANUP_INTERVAL, 30000). % 30 секунд
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%% ===================================================================
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%% API
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%% ===================================================================
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start_link() ->
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% Счётчики для метрик (сессии, ws-соединения)
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ets:new(eventhub_counters, [named_table, public, set, {write_concurrency, true}]),
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gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
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init_tables() ->
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gen_server:call(?MODULE, init_tables).
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wait_for_tables() ->
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gen_server:call(?MODULE, wait_for_tables).
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add_cluster_nodes(Nodes) ->
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gen_server:call(?MODULE, {add_nodes, Nodes}).
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%% ===================================================================
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%% gen_server callbacks
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%% ===================================================================
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init([]) ->
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{ok, #{}}.
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handle_call(init_tables, _From, State) ->
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ExtraNodes = application:get_env(eventhub, extra_db_nodes, []),
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case ExtraNodes of
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[] ->
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ok = maybe_recreate_schema();
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%% ok = migration_engine:init_migrations_table(),
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%% _ = migration_engine:apply_pending(); //todo выключил - обваливает кластер, нужно разбираться
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_ ->
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ok = join_cluster(ExtraNodes)
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end,
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lists:foreach(fun create_table/1, ?TABLES),
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% Принудительное создание node_metric на каждом узле
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case mnesia:create_table(node_metric, [
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{disc_copies, [node()]}, % хранить на диске
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{local_content, true}, % не реплицировать
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{attributes, record_info(fields, node_metric)}
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]) of
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{atomic, ok} -> ok;
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{aborted, {already_exists, node_metric}} -> ok;
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_ -> ok
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end,
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% ГАРАНТИРУЕМ, что узел имеет локальную копию node_metric (критично для присоединяющихся узлов)
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case lists:member(node(), mnesia:table_info(node_metric, disc_copies) ++
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mnesia:table_info(node_metric, ram_copies)) of
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false -> mnesia:add_table_copy(node_metric, node(), disc_copies);
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true -> ok
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end,
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ok = create_indices(),
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ok = stats_collector:subscribe(),
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ok = start_cleanup_timer(),
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{reply, ok, State};
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handle_call({add_nodes, Nodes}, _From, State) ->
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ok = do_add_nodes(Nodes),
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{reply, ok, State};
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handle_call(wait_for_tables, _From, State) ->
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mnesia:wait_for_tables(?TABLES, ?TABLE_WAIT_TIMEOUT),
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{reply, ok, State}.
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handle_cast(_Msg, State) -> {noreply, State}.
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handle_info({cleanup}, State) ->
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prune_dead_nodes(),
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erlang:send_after(?CLEANUP_INTERVAL, self(), {cleanup}),
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{noreply, State};
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handle_info(_Info, State) -> {noreply, State}.
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terminate(_Reason, _State) -> ok.
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code_change(_OldVsn, State, _Extra) -> {ok, State}.
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%% ===================================================================
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%% Управление схемой
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%% ===================================================================
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maybe_recreate_schema() ->
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MnesiaDir = mnesia:system_info(directory),
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case filelib:is_dir(MnesiaDir) of
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false ->
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io:format("Mnesia directory (~s) not found. Creating fresh schema...~n", [MnesiaDir]),
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mnesia:stop(),
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mnesia:delete_schema([node()]),
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mnesia:create_schema([node()]),
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mnesia:start(),
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ok;
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true ->
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io:format("Mnesia directory exists (~s). Reusing existing schema.~n", [MnesiaDir]),
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case mnesia:system_info(is_running) of
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yes -> ok;
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_ -> mnesia:start()
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end
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end.
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join_cluster(Nodes) ->
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case mnesia:system_info(is_running) of
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yes -> mnesia:stop();
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no -> ok
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end,
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application:set_env(mnesia, extra_db_nodes, Nodes),
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mnesia:start(),
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ensure_schema_disc(),
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wait_for_tables_available(),
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lists:foreach(fun add_local_disc_copy/1, ?DISC_TABLES).
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do_add_nodes(Nodes) ->
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ExtraNodes = application:get_env(eventhub, extra_db_nodes, []),
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application:set_env(eventhub, extra_db_nodes, Nodes ++ ExtraNodes),
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{ok, _} = mnesia:change_config(extra_db_nodes, Nodes),
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ensure_schema_disc(),
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wait_for_tables_available(),
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lists:foreach(fun add_local_disc_copy/1, ?DISC_TABLES).
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ensure_schema_disc() ->
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case lists:member(node(), mnesia:table_info(schema, disc_copies)) of
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false ->
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io:format("Changing schema copy to disc...~n"),
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case mnesia:change_table_copy_type(schema, node(), disc_copies) of
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{atomic, ok} -> ok;
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{aborted, {already_exists, _, _}} -> ok;
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{aborted, Reason} -> error({failed_schema_disc, Reason})
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end;
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true -> ok
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end.
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add_local_disc_copy(Tab) ->
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case lists:member(node(), mnesia:table_info(Tab, disc_copies)) of
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false ->
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io:format("Adding local disc copy of table ~p...~n", [Tab]),
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case mnesia:add_table_copy(Tab, node(), disc_copies) of
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{atomic, ok} -> ok;
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{aborted, {already_exists, _}} -> ok;
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{aborted, Reason} ->
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io:format("Could not add disc copy for ~p: ~p~n", [Tab, Reason])
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end;
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true -> ok
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end.
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wait_for_tables_available() ->
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lists:foreach(fun(Tab) -> wait_for_table(Tab) end, ?DISC_TABLES).
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wait_for_table(Tab) ->
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case lists:member(Tab, mnesia:system_info(tables)) of
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true -> ok;
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false ->
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timer:sleep(100),
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wait_for_table(Tab)
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end.
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%% ===================================================================
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%% Автоматическая очистка мёртвых узлов
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%% ===================================================================
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start_cleanup_timer() ->
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erlang:send_after(?CLEANUP_INTERVAL, self(), {cleanup}),
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ok.
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prune_dead_nodes() ->
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AliveNodes = lists:filter(fun(Node) ->
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Node =/= node() andalso net_adm:ping(Node) =:= pong
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end, mnesia:system_info(db_nodes)),
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DeadNodes = mnesia:system_info(db_nodes) -- [node() | AliveNodes],
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lists:foreach(fun(Node) ->
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io:format("Removing dead node ~p from Mnesia schema...~n", [Node]),
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lists:foreach(fun(Tab) ->
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case lists:member(Node, mnesia:table_info(Tab, disc_copies)) of
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true -> catch mnesia:del_table_copy(Tab, Node);
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false -> ok
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end
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end, ?DISC_TABLES),
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catch mnesia:del_table_copy(schema, Node)
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end, DeadNodes).
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%% ===================================================================
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%% Создание / открытие таблиц
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%% ===================================================================
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create_table(Table) ->
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Opts = table_opts(Table),
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case mnesia:create_table(Table, Opts) of
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{atomic, ok} -> ok;
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{aborted, {already_exists, _}} -> ok;
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{aborted, Reason} ->
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error({table_creation_failed, Table, Reason})
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end.
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%% ===================================================================
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%% Опции хранения таблиц
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%% ===================================================================
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table_opts(user) -> [{disc_copies, [node()]}, {attributes, record_info(fields, user)}];
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table_opts(admin) -> [{disc_copies, [node()]}, {attributes, record_info(fields, admin)}];
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table_opts(calendar) -> [{disc_copies, [node()]}, {attributes, record_info(fields, calendar)}];
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table_opts(calendar_share) -> [{disc_copies, [node()]}, {attributes, record_info(fields, calendar_share)}];
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table_opts(calendar_specialist) -> [{disc_copies, [node()]}, {attributes, record_info(fields, calendar_specialist)}];
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table_opts(event) -> [{disc_copies, [node()]}, {attributes, record_info(fields, event)}];
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table_opts(recurrence_exception) -> [{disc_copies, [node()]}, {attributes, record_info(fields, recurrence_exception)}];
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table_opts(booking) -> [{disc_copies, [node()]}, {attributes, record_info(fields, booking)}];
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table_opts(review) -> [{disc_copies, [node()]}, {attributes, record_info(fields, review)}];
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table_opts(report) -> [{disc_copies, [node()]}, {attributes, record_info(fields, report)}];
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table_opts(banned_word) -> [{disc_copies, [node()]}, {attributes, record_info(fields, banned_word)}];
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table_opts(ticket) -> [{disc_copies, [node()]}, {attributes, record_info(fields, ticket)}];
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table_opts(subscription) -> [{disc_copies, [node()]}, {attributes, record_info(fields, subscription)}];
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table_opts(admin_audit) -> [{disc_copies, [node()]}, {attributes, record_info(fields, admin_audit)}];
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table_opts(notification) -> [{disc_copies, [node()]}, {attributes, record_info(fields, notification)}];
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table_opts(stats) -> [{disc_copies, [node()]}, {attributes, record_info(fields, stats)}];
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table_opts(schema_migration) -> [{disc_copies, [node()]}, {attributes, record_info(fields, schema_migration)}];
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table_opts(session) -> [{ram_copies, [node()]}, {attributes, record_info(fields, session)}];
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table_opts(verification) -> [{ram_copies, [node()]}, {attributes, record_info(fields, verification)}];
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table_opts(admin_session) -> [{ram_copies, [node()]}, {attributes, record_info(fields, admin_session)}];
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table_opts(auth_session) -> [{disc_copies, [node()]}, {attributes, record_info(fields, auth_session)}];
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table_opts(node_metric) -> [{disc_copies, [node()]}, {local_content, true}, {attributes, record_info(fields, node_metric)}].
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%% ===================================================================
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%% Индексы
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%% ===================================================================
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create_indices() ->
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mnesia:add_table_index(event, calendar_id),
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mnesia:add_table_index(event, title),
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mnesia:add_table_index(event, created_at),
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mnesia:add_table_index(event, start_time),
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mnesia:add_table_index(event, event_type),
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mnesia:add_table_index(event, master_id),
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mnesia:add_table_index(event, specialist_id),
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mnesia:add_table_index(event, status),
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mnesia:add_table_index(booking, event_id),
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mnesia:add_table_index(booking, user_id),
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mnesia:add_table_index(booking, status),
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mnesia:add_table_index(calendar, owner_id),
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mnesia:add_table_index(calendar, status),
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mnesia:add_table_index(calendar, short_name),
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mnesia:add_table_index(calendar, category),
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mnesia:add_table_index(calendar_specialist, calendar_id),
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mnesia:add_table_index(calendar_specialist, user_id),
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mnesia:add_table_index(user, nickname),
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mnesia:add_table_index(user, email),
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mnesia:add_table_index(notification, user_id),
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mnesia:add_table_index(notification, is_read),
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mnesia:add_table_index(auth_session, family_id),
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mnesia:add_table_index(auth_session, subject_id),
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%% ===================================================================
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%% EventHub – infra_mnesia (финальная версия с автоочисткой кластера)
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%% ===================================================================
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-module(infra_mnesia).
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-behaviour(gen_server).
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-include("records.hrl").
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-export([start_link/0, init_tables/0, wait_for_tables/0, wait_for_table/1]).
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-export([add_cluster_nodes/1]).
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-export([init/1, handle_call/3, handle_cast/2, handle_info/2,
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terminate/2, code_change/3]).
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-define(TABLES, [
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user, session, verification, admin, admin_session, auth_session,
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calendar, calendar_share, calendar_specialist,
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event, recurrence_exception,
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booking,
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review, report, banned_word,
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ticket, subscription,
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admin_audit, notification,
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stats, node_metric, schema_migration
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]).
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-define(DISC_TABLES, ?TABLES -- [session, verification, admin_session, node_metric]).
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-define(TABLE_WAIT_TIMEOUT, 5000).
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-define(CLEANUP_INTERVAL, 30000). % 30 секунд
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%% ===================================================================
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%% API
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%% ===================================================================
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start_link() ->
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% Счётчики для метрик (сессии, ws-соединения)
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ets:new(eventhub_counters, [named_table, public, set, {write_concurrency, true}]),
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gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
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init_tables() ->
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gen_server:call(?MODULE, init_tables).
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wait_for_tables() ->
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gen_server:call(?MODULE, wait_for_tables).
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add_cluster_nodes(Nodes) ->
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gen_server:call(?MODULE, {add_nodes, Nodes}).
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%% ===================================================================
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%% gen_server callbacks
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%% ===================================================================
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init([]) ->
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{ok, #{}}.
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handle_call(init_tables, _From, State) ->
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ExtraNodes = application:get_env(eventhub, extra_db_nodes, []),
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case ExtraNodes of
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[] ->
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ok = maybe_recreate_schema();
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_ ->
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ok = join_cluster(ExtraNodes)
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end,
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lists:foreach(fun create_table/1, ?TABLES),
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% Принудительное создание node_metric на каждом узле
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case mnesia:create_table(node_metric, [
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{disc_copies, [node()]}, % хранить на диске
|
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{local_content, true}, % не реплицировать
|
||||
{attributes, record_info(fields, node_metric)}
|
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]) of
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{atomic, ok} -> ok;
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{aborted, {already_exists, node_metric}} -> ok;
|
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_ -> ok
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end,
|
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% ГАРАНТИРУЕМ, что узел имеет локальную копию node_metric (критично для присоединяющихся узлов)
|
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case lists:member(node(), mnesia:table_info(node_metric, disc_copies) ++
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mnesia:table_info(node_metric, ram_copies)) of
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false -> mnesia:add_table_copy(node_metric, node(), disc_copies);
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true -> ok
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end,
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||||
ok = create_indices(),
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ok = stats_collector:subscribe(),
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ok = start_cleanup_timer(),
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{reply, ok, State};
|
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|
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handle_call({add_nodes, Nodes}, _From, State) ->
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ok = do_add_nodes(Nodes),
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{reply, ok, State};
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handle_call(wait_for_tables, _From, State) ->
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mnesia:wait_for_tables(?TABLES, ?TABLE_WAIT_TIMEOUT),
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{reply, ok, State}.
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handle_cast(_Msg, State) -> {noreply, State}.
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handle_info({cleanup}, State) ->
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prune_dead_nodes(),
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erlang:send_after(?CLEANUP_INTERVAL, self(), {cleanup}),
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{noreply, State};
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handle_info(_Info, State) -> {noreply, State}.
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terminate(_Reason, _State) -> ok.
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code_change(_OldVsn, State, _Extra) -> {ok, State}.
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%% ===================================================================
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%% Управление схемой
|
||||
%% ===================================================================
|
||||
|
||||
maybe_recreate_schema() ->
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MnesiaDir = mnesia:system_info(directory),
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case filelib:is_dir(MnesiaDir) of
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false ->
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||||
io:format("Mnesia directory (~s) not found. Creating fresh schema...~n", [MnesiaDir]),
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||||
mnesia:stop(),
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mnesia:delete_schema([node()]),
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mnesia:create_schema([node()]),
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mnesia:start(),
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||||
ok;
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true ->
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io:format("Mnesia directory exists (~s). Reusing existing schema.~n", [MnesiaDir]),
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||||
case mnesia:system_info(is_running) of
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||||
yes -> ok;
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||||
_ -> mnesia:start()
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||||
end
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||||
end.
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||||
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||||
join_cluster(Nodes) ->
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||||
case mnesia:system_info(is_running) of
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||||
yes -> mnesia:stop();
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||||
no -> ok
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||||
end,
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||||
application:set_env(mnesia, extra_db_nodes, Nodes),
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||||
mnesia:start(),
|
||||
ensure_schema_disc(),
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||||
wait_for_tables_available(),
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||||
lists:foreach(fun add_local_disc_copy/1, ?DISC_TABLES).
|
||||
|
||||
do_add_nodes(Nodes) ->
|
||||
ExtraNodes = application:get_env(eventhub, extra_db_nodes, []),
|
||||
application:set_env(eventhub, extra_db_nodes, Nodes ++ ExtraNodes),
|
||||
{ok, _} = mnesia:change_config(extra_db_nodes, Nodes),
|
||||
ensure_schema_disc(),
|
||||
wait_for_tables_available(),
|
||||
lists:foreach(fun add_local_disc_copy/1, ?DISC_TABLES).
|
||||
|
||||
ensure_schema_disc() ->
|
||||
case lists:member(node(), mnesia:table_info(schema, disc_copies)) of
|
||||
false ->
|
||||
io:format("Changing schema copy to disc...~n"),
|
||||
case mnesia:change_table_copy_type(schema, node(), disc_copies) of
|
||||
{atomic, ok} -> ok;
|
||||
{aborted, {already_exists, _, _}} -> ok;
|
||||
{aborted, Reason} -> error({failed_schema_disc, Reason})
|
||||
end;
|
||||
true -> ok
|
||||
end.
|
||||
|
||||
add_local_disc_copy(Tab) ->
|
||||
case lists:member(node(), mnesia:table_info(Tab, disc_copies)) of
|
||||
false ->
|
||||
io:format("Adding local disc copy of table ~p...~n", [Tab]),
|
||||
case mnesia:add_table_copy(Tab, node(), disc_copies) of
|
||||
{atomic, ok} -> ok;
|
||||
{aborted, {already_exists, _}} -> ok;
|
||||
{aborted, Reason} ->
|
||||
io:format("Could not add disc copy for ~p: ~p~n", [Tab, Reason])
|
||||
end;
|
||||
true -> ok
|
||||
end.
|
||||
|
||||
wait_for_tables_available() ->
|
||||
lists:foreach(fun(Tab) -> wait_for_table(Tab) end, ?DISC_TABLES).
|
||||
|
||||
wait_for_table(Tab) ->
|
||||
case lists:member(Tab, mnesia:system_info(tables)) of
|
||||
true -> ok;
|
||||
false ->
|
||||
timer:sleep(100),
|
||||
wait_for_table(Tab)
|
||||
end.
|
||||
|
||||
%% ===================================================================
|
||||
%% Автоматическая очистка мёртвых узлов
|
||||
%% ===================================================================
|
||||
|
||||
start_cleanup_timer() ->
|
||||
erlang:send_after(?CLEANUP_INTERVAL, self(), {cleanup}),
|
||||
ok.
|
||||
|
||||
prune_dead_nodes() ->
|
||||
AliveNodes = lists:filter(fun(Node) ->
|
||||
Node =/= node() andalso net_adm:ping(Node) =:= pong
|
||||
end, mnesia:system_info(db_nodes)),
|
||||
DeadNodes = mnesia:system_info(db_nodes) -- [node() | AliveNodes],
|
||||
lists:foreach(fun(Node) ->
|
||||
io:format("Removing dead node ~p from Mnesia schema...~n", [Node]),
|
||||
lists:foreach(fun(Tab) ->
|
||||
case lists:member(Node, mnesia:table_info(Tab, disc_copies)) of
|
||||
true -> catch mnesia:del_table_copy(Tab, Node);
|
||||
false -> ok
|
||||
end
|
||||
end, ?DISC_TABLES),
|
||||
catch mnesia:del_table_copy(schema, Node)
|
||||
end, DeadNodes).
|
||||
|
||||
%% ===================================================================
|
||||
%% Создание / открытие таблиц
|
||||
%% ===================================================================
|
||||
|
||||
create_table(Table) ->
|
||||
Opts = table_opts(Table),
|
||||
case mnesia:create_table(Table, Opts) of
|
||||
{atomic, ok} -> ok;
|
||||
{aborted, {already_exists, _}} -> ok;
|
||||
{aborted, Reason} ->
|
||||
error({table_creation_failed, Table, Reason})
|
||||
end.
|
||||
|
||||
%% ===================================================================
|
||||
%% Опции хранения таблиц
|
||||
%% ===================================================================
|
||||
|
||||
table_opts(user) -> [{disc_copies, [node()]}, {attributes, record_info(fields, user)}];
|
||||
table_opts(admin) -> [{disc_copies, [node()]}, {attributes, record_info(fields, admin)}];
|
||||
table_opts(calendar) -> [{disc_copies, [node()]}, {attributes, record_info(fields, calendar)}];
|
||||
table_opts(calendar_share) -> [{disc_copies, [node()]}, {attributes, record_info(fields, calendar_share)}];
|
||||
table_opts(calendar_specialist) -> [{disc_copies, [node()]}, {attributes, record_info(fields, calendar_specialist)}];
|
||||
table_opts(event) -> [{disc_copies, [node()]}, {attributes, record_info(fields, event)}];
|
||||
table_opts(recurrence_exception) -> [{disc_copies, [node()]}, {attributes, record_info(fields, recurrence_exception)}];
|
||||
table_opts(booking) -> [{disc_copies, [node()]}, {attributes, record_info(fields, booking)}];
|
||||
table_opts(review) -> [{disc_copies, [node()]}, {attributes, record_info(fields, review)}];
|
||||
table_opts(report) -> [{disc_copies, [node()]}, {attributes, record_info(fields, report)}];
|
||||
table_opts(banned_word) -> [{disc_copies, [node()]}, {attributes, record_info(fields, banned_word)}];
|
||||
table_opts(ticket) -> [{disc_copies, [node()]}, {attributes, record_info(fields, ticket)}];
|
||||
table_opts(subscription) -> [{disc_copies, [node()]}, {attributes, record_info(fields, subscription)}];
|
||||
table_opts(admin_audit) -> [{disc_copies, [node()]}, {attributes, record_info(fields, admin_audit)}];
|
||||
table_opts(notification) -> [{disc_copies, [node()]}, {attributes, record_info(fields, notification)}];
|
||||
table_opts(stats) -> [{disc_copies, [node()]}, {attributes, record_info(fields, stats)}];
|
||||
table_opts(schema_migration) -> [{disc_copies, [node()]}, {attributes, record_info(fields, schema_migration)}];
|
||||
table_opts(session) -> [{ram_copies, [node()]}, {attributes, record_info(fields, session)}];
|
||||
table_opts(verification) -> [{ram_copies, [node()]}, {attributes, record_info(fields, verification)}];
|
||||
table_opts(admin_session) -> [{ram_copies, [node()]}, {attributes, record_info(fields, admin_session)}];
|
||||
table_opts(auth_session) -> [{disc_copies, [node()]}, {attributes, record_info(fields, auth_session)}];
|
||||
table_opts(node_metric) -> [{disc_copies, [node()]}, {local_content, true}, {attributes, record_info(fields, node_metric)}].
|
||||
|
||||
%% ===================================================================
|
||||
%% Индексы
|
||||
%% ===================================================================
|
||||
|
||||
create_indices() ->
|
||||
mnesia:add_table_index(event, calendar_id),
|
||||
mnesia:add_table_index(event, title),
|
||||
mnesia:add_table_index(event, created_at),
|
||||
mnesia:add_table_index(event, start_time),
|
||||
mnesia:add_table_index(event, event_type),
|
||||
mnesia:add_table_index(event, master_id),
|
||||
mnesia:add_table_index(event, specialist_id),
|
||||
mnesia:add_table_index(event, status),
|
||||
mnesia:add_table_index(booking, event_id),
|
||||
mnesia:add_table_index(booking, user_id),
|
||||
mnesia:add_table_index(booking, status),
|
||||
mnesia:add_table_index(calendar, owner_id),
|
||||
mnesia:add_table_index(calendar, status),
|
||||
mnesia:add_table_index(calendar, short_name),
|
||||
mnesia:add_table_index(calendar, category),
|
||||
mnesia:add_table_index(calendar_specialist, calendar_id),
|
||||
mnesia:add_table_index(calendar_specialist, user_id),
|
||||
mnesia:add_table_index(user, nickname),
|
||||
mnesia:add_table_index(user, email),
|
||||
mnesia:add_table_index(notification, user_id),
|
||||
mnesia:add_table_index(notification, is_read),
|
||||
mnesia:add_table_index(auth_session, family_id),
|
||||
mnesia:add_table_index(auth_session, subject_id),
|
||||
ok.
|
||||
Reference in New Issue
Block a user