194 lines
6.3 KiB
Erlang
194 lines
6.3 KiB
Erlang
%%%----------------------------------------------------------------------
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%%% File : ejabberd_riak_sup.erl
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%%% Author : Alexey Shchepin <alexey@process-one.net>
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%%% Purpose : Riak connections supervisor
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%%% Created : 29 Dec 2011 by Alexey Shchepin <alexey@process-one.net>
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%%%
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%%%
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%%% ejabberd, Copyright (C) 2002-2019 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_riak_sup).
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-behaviour(supervisor).
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-behaviour(ejabberd_config).
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-author('alexey@process-one.net').
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-export([start_link/0, init/1, get_pids/0,
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transform_options/1, get_random_pid/0,
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host_up/1, config_reloaded/0, opt_type/1]).
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-include("logger.hrl").
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-define(DEFAULT_POOL_SIZE, 10).
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-define(DEFAULT_RIAK_START_INTERVAL, 30). % 30 seconds
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-define(DEFAULT_RIAK_HOST, "127.0.0.1").
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-define(DEFAULT_RIAK_PORT, 8087).
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% time to wait for the supervisor to start its child before returning
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% a timeout error to the request
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-define(CONNECT_TIMEOUT, 500). % milliseconds
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host_up(Host) ->
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case is_riak_configured(Host) of
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true ->
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ejabberd:start_app(riakc),
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lists:foreach(
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fun(Spec) ->
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supervisor:start_child(?MODULE, Spec)
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end, get_specs());
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false ->
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ok
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end.
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config_reloaded() ->
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case is_riak_configured() of
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true ->
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ejabberd:start_app(riakc),
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lists:foreach(
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fun(Spec) ->
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supervisor:start_child(?MODULE, Spec)
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end, get_specs());
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false ->
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lists:foreach(
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fun({Id, _, _, _}) ->
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supervisor:terminate_child(?MODULE, Id),
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supervisor:delete_child(?MODULE, Id)
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end, supervisor:which_children(?MODULE))
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end.
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is_riak_configured() ->
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lists:any(fun is_riak_configured/1, ejabberd_config:get_myhosts()).
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is_riak_configured(Host) ->
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ServerConfigured = ejabberd_config:has_option({riak_server, Host}),
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PortConfigured = ejabberd_config:has_option({riak_port, Host}),
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StartIntervalConfigured = ejabberd_config:has_option({riak_start_interval, Host}),
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PoolConfigured = ejabberd_config:has_option({riak_pool_size, Host}),
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CacertConfigured = ejabberd_config:has_option({riak_cacertfile, Host}),
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UserConfigured = ejabberd_config:has_option({riak_username, Host}),
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PassConfigured = ejabberd_config:has_option({riak_password, Host}),
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AuthConfigured = lists:member(
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ejabberd_auth_riak,
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ejabberd_auth:auth_modules(Host)),
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SMConfigured = ejabberd_config:get_option({sm_db_type, Host}) == riak,
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RouterConfigured = ejabberd_config:get_option({router_db_type, Host}) == riak,
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ServerConfigured or PortConfigured or StartIntervalConfigured
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or PoolConfigured or CacertConfigured
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or UserConfigured or PassConfigured
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or SMConfigured or RouterConfigured
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or AuthConfigured.
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start_link() ->
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supervisor:start_link({local, ?MODULE}, ?MODULE, []).
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init([]) ->
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ejabberd_hooks:add(config_reloaded, ?MODULE, config_reloaded, 20),
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ejabberd_hooks:add(host_up, ?MODULE, host_up, 20),
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Specs = case is_riak_configured() of
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true ->
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ejabberd:start_app(riakc),
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get_specs();
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false ->
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[]
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end,
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{ok, {{one_for_one, 500, 1}, Specs}}.
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-spec get_specs() -> [supervisor:child_spec()].
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get_specs() ->
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PoolSize = get_pool_size(),
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StartInterval = get_start_interval(),
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Server = get_riak_server(),
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Port = get_riak_port(),
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CACertFile = get_riak_cacertfile(),
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Username = get_riak_username(),
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Password = get_riak_password(),
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Options = lists:filter(
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fun(X) -> X /= nil end,
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[auto_reconnect,
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{keepalive, true},
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if CACertFile /= nil -> {cacertfile ,CACertFile};
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true -> nil
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end,
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if (Username /= nil) and (Password /= nil) ->
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{credentials, Username, Password};
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true -> nil
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end]),
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lists:map(
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fun(I) ->
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{ejabberd_riak:get_proc(I),
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{ejabberd_riak, start_link,
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[I, Server, Port, StartInterval*1000, Options]},
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transient, 2000, worker, [?MODULE]}
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end, lists:seq(1, PoolSize)).
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get_start_interval() ->
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ejabberd_config:get_option(riak_start_interval, ?DEFAULT_RIAK_START_INTERVAL).
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get_pool_size() ->
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ejabberd_config:get_option(riak_pool_size, ?DEFAULT_POOL_SIZE).
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get_riak_server() ->
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ejabberd_config:get_option(riak_server, ?DEFAULT_RIAK_HOST).
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get_riak_cacertfile() ->
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ejabberd_config:get_option(riak_cacertfile, nil).
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get_riak_username() ->
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ejabberd_config:get_option(riak_username, nil).
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get_riak_password() ->
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ejabberd_config:get_option(riak_password, nil).
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get_riak_port() ->
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ejabberd_config:get_option(riak_port, ?DEFAULT_RIAK_PORT).
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get_pids() ->
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[ejabberd_riak:get_proc(I) || I <- lists:seq(1, get_pool_size())].
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get_random_pid() ->
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I = p1_rand:round_robin(get_pool_size()) + 1,
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ejabberd_riak:get_proc(I).
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transform_options(Opts) ->
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lists:foldl(fun transform_options/2, [], Opts).
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transform_options({riak_server, {S, P}}, Opts) ->
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[{riak_server, S}, {riak_port, P}|Opts];
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transform_options(Opt, Opts) ->
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[Opt|Opts].
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-spec opt_type(atom()) -> fun((any()) -> any()) | [atom()].
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opt_type(riak_pool_size) ->
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fun (N) when is_integer(N), N >= 1 -> N end;
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opt_type(riak_port) ->
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fun(P) when is_integer(P), P > 0, P < 65536 -> P end;
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opt_type(riak_server) ->
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fun(S) -> binary_to_list(iolist_to_binary(S)) end;
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opt_type(riak_start_interval) ->
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fun (N) when is_integer(N), N >= 1 -> N end;
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opt_type(riak_cacertfile) ->
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fun(S) -> binary_to_list(iolist_to_binary(S)) end;
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opt_type(riak_username) ->
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fun(S) -> binary_to_list(iolist_to_binary(S)) end;
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opt_type(riak_password) ->
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fun(S) -> binary_to_list(iolist_to_binary(S)) end;
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opt_type(_) ->
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[riak_pool_size, riak_port, riak_server,
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riak_start_interval, riak_cacertfile, riak_username, riak_password].
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