mirror of
https://github.com/processone/ejabberd.git
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242 lines
7.5 KiB
Erlang
242 lines
7.5 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_sql_sup.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : SQL connections supervisor
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%%% Created : 22 Dec 2004 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2017 ProcessOne
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%%%
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%%% This program is free software; you can redistribute it and/or
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%%% modify it under the terms of the GNU General Public License as
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%%% published by the Free Software Foundation; either version 2 of the
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%%% License, or (at your option) any later version.
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%%%
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%%% This program is distributed in the hope that it will be useful,
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%%% but WITHOUT ANY WARRANTY; without even the implied warranty of
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%%% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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%%% General Public License for more details.
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%%%
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%%% You should have received a copy of the GNU General Public License along
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%%% with this program; if not, write to the Free Software Foundation, Inc.,
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%%% 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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%%%
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%%%----------------------------------------------------------------------
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-module(ejabberd_sql_sup).
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-behaviour(ejabberd_config).
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-author('alexey@process-one.net').
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-export([start_link/1, init/1, add_pid/2, remove_pid/2,
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get_pids/1, get_random_pid/1, transform_options/1,
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opt_type/1]).
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-include("ejabberd.hrl").
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-include("logger.hrl").
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-define(PGSQL_PORT, 5432).
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-define(MYSQL_PORT, 3306).
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-define(DEFAULT_POOL_SIZE, 10).
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-define(DEFAULT_SQL_START_INTERVAL, 30).
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-define(CONNECT_TIMEOUT, 500).
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-record(sql_pool, {host, pid}).
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start_link(Host) ->
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ejabberd_mnesia:create(?MODULE, sql_pool,
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[{ram_copies, [node()]}, {type, bag},
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{local_content, true},
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{attributes, record_info(fields, sql_pool)}]),
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F = fun () -> mnesia:delete({sql_pool, Host}) end,
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mnesia:ets(F),
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supervisor:start_link({local,
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gen_mod:get_module_proc(Host, ?MODULE)},
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?MODULE, [Host]).
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init([Host]) ->
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StartInterval = ejabberd_config:get_option(
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{sql_start_interval, Host},
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fun(I) when is_integer(I), I>0 -> I end,
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?DEFAULT_SQL_START_INTERVAL),
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Type = ejabberd_config:get_option({sql_type, Host},
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fun(mysql) -> mysql;
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(pgsql) -> pgsql;
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(sqlite) -> sqlite;
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(mssql) -> mssql;
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(odbc) -> odbc
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end, odbc),
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PoolSize = get_pool_size(Type, Host),
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case Type of
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sqlite ->
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check_sqlite_db(Host);
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mssql ->
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ejabberd_sql:init_mssql(Host);
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_ ->
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ok
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end,
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{ok,
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{{one_for_one, PoolSize * 10, 1},
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lists:map(fun (I) ->
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{I,
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{ejabberd_sql, start_link,
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[Host, StartInterval * 1000]},
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transient, 2000, worker, [?MODULE]}
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end,
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lists:seq(1, PoolSize))}}.
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get_pids(Host) ->
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Rs = mnesia:dirty_read(sql_pool, Host),
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[R#sql_pool.pid || R <- Rs].
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get_random_pid(Host) ->
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case get_pids(Host) of
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[] -> none;
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Pids ->
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I = randoms:round_robin(length(Pids)) + 1,
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lists:nth(I, Pids)
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end.
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add_pid(Host, Pid) ->
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F = fun () ->
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mnesia:write(#sql_pool{host = Host, pid = Pid})
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end,
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mnesia:ets(F).
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remove_pid(Host, Pid) ->
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F = fun () ->
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mnesia:delete_object(#sql_pool{host = Host, pid = Pid})
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end,
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mnesia:ets(F).
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-spec get_pool_size(atom(), binary()) -> pos_integer().
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get_pool_size(SQLType, Host) ->
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PoolSize = ejabberd_config:get_option(
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{sql_pool_size, Host},
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fun(I) when is_integer(I), I>0 -> I end,
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case SQLType of
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sqlite -> 1;
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_ -> ?DEFAULT_POOL_SIZE
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end),
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if PoolSize > 1 andalso SQLType == sqlite ->
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?WARNING_MSG("it's not recommended to set sql_pool_size > 1 for "
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"sqlite, because it may cause race conditions", []);
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true ->
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ok
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end,
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PoolSize.
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transform_options(Opts) ->
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lists:foldl(fun transform_options/2, [], Opts).
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transform_options({odbc_server, {Type, Server, Port, DB, User, Pass}}, Opts) ->
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[{sql_type, Type},
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{sql_server, Server},
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{sql_port, Port},
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{sql_database, DB},
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{sql_username, User},
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{sql_password, Pass}|Opts];
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transform_options({odbc_server, {mysql, Server, DB, User, Pass}}, Opts) ->
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transform_options({odbc_server, {mysql, Server, ?MYSQL_PORT, DB, User, Pass}}, Opts);
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transform_options({odbc_server, {pgsql, Server, DB, User, Pass}}, Opts) ->
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transform_options({odbc_server, {pgsql, Server, ?PGSQL_PORT, DB, User, Pass}}, Opts);
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transform_options({odbc_server, {sqlite, DB}}, Opts) ->
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transform_options({odbc_server, {sqlite, DB}}, Opts);
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transform_options(Opt, Opts) ->
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[Opt|Opts].
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check_sqlite_db(Host) ->
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DB = ejabberd_sql:sqlite_db(Host),
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File = ejabberd_sql:sqlite_file(Host),
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Ret = case filelib:ensure_dir(File) of
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ok ->
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case sqlite3:open(DB, [{file, File}]) of
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{ok, _Ref} -> ok;
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{error, {already_started, _Ref}} -> ok;
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{error, R} -> {error, R}
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end;
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Err ->
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Err
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end,
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case Ret of
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ok ->
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sqlite3:sql_exec(DB, "pragma foreign_keys = on"),
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case sqlite3:list_tables(DB) of
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[] ->
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create_sqlite_tables(DB),
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sqlite3:close(DB),
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ok;
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[_H | _] ->
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ok
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end;
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{error, Reason} ->
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?INFO_MSG("Failed open sqlite database, reason ~p", [Reason])
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end.
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create_sqlite_tables(DB) ->
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SqlDir = case code:priv_dir(ejabberd) of
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{error, _} ->
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?SQL_DIR;
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PrivDir ->
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filename:join(PrivDir, "sql")
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end,
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File = filename:join(SqlDir, "lite.sql"),
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case file:open(File, [read, binary]) of
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{ok, Fd} ->
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Qs = read_lines(Fd, File, []),
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ok = sqlite3:sql_exec(DB, "begin"),
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[ok = sqlite3:sql_exec(DB, Q) || Q <- Qs],
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ok = sqlite3:sql_exec(DB, "commit");
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{error, Reason} ->
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?INFO_MSG("Failed to read SQLite schema file: ~s",
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[file:format_error(Reason)])
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end.
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read_lines(Fd, File, Acc) ->
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case file:read_line(Fd) of
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{ok, Line} ->
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NewAcc = case str:strip(str:strip(Line, both, $\r), both, $\n) of
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<<"--", _/binary>> ->
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Acc;
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<<>> ->
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Acc;
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_ ->
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[Line|Acc]
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end,
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read_lines(Fd, File, NewAcc);
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eof ->
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QueryList = str:tokens(list_to_binary(lists:reverse(Acc)), <<";">>),
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lists:flatmap(
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fun(Query) ->
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case str:strip(str:strip(Query, both, $\r), both, $\n) of
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<<>> ->
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[];
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Q ->
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[<<Q/binary, $;>>]
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end
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end, QueryList);
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{error, _} = Err ->
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?ERROR_MSG("Failed read from lite.sql, reason: ~p", [Err]),
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[]
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end.
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opt_type(sql_pool_size) ->
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fun (I) when is_integer(I), I > 0 -> I end;
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opt_type(sql_start_interval) ->
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fun (I) when is_integer(I), I > 0 -> I end;
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opt_type(sql_type) ->
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fun (mysql) -> mysql;
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(pgsql) -> pgsql;
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(sqlite) -> sqlite;
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(mssql) -> mssql;
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(odbc) -> odbc
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end;
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opt_type(_) ->
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[sql_pool_size, sql_start_interval, sql_type].
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