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% Licensed under the Apache License, Version 2.0 (the "License"); you may not
% use this file except in compliance with the License. You may obtain a copy of
% the License at
%
% http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
% WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
% License for the specific language governing permissions and limitations under
% the License.
-module(couch_server_sup).
-behaviour(supervisor).
-define(DEFAULT_INI, "couch.ini").
-export([start_link/1,stop/0]).
-include("couch_db.hrl").
%% supervisor callbacks
-export([init/1]).
start_link(IniFilename) ->
case whereis(couch_server_sup) of
undefined ->
start_server(IniFilename);
_Else ->
{error, already_started}
end.
start_server("") ->
% no ini file specified, check the command line args
IniFile =
case init:get_argument(couchini) of
{ok, [CmdLineIniFilename]} ->
CmdLineIniFilename;
_Else ->
?DEFAULT_INI
end,
start_server(IniFile);
start_server(InputIniFilename) ->
case init:get_argument(pidfile) of
{ok, [PidFile]} ->
case file:write_file(PidFile, os:getpid()) of
ok -> ok;
Error -> io:format("Failed to write PID file ~s, error: ~p", [PidFile, Error])
end;
_ -> ok
end,
{ok, Cwd} = file:get_cwd(),
IniFilename = couch_util:abs_pathname(InputIniFilename),
IniBin =
case file:read_file(IniFilename) of
{ok, IniBin0} ->
IniBin0;
{error, enoent} ->
Msg = io_lib:format("Couldn't find server configuration file ~s.", [InputIniFilename]),
io:format("~s~n", [Msg]),
throw({startup_error, Msg})
end,
{ok, Ini} = couch_util:parse_ini(binary_to_list(IniBin)),
ConsoleStartupMsg = proplists:get_value({"Couch", "ConsoleStartupMsg"}, Ini, "Apache CouchDB is starting."),
LogLevel = list_to_atom(proplists:get_value({"Couch", "LogLevel"}, Ini, "error")),
DbRootDir = proplists:get_value({"Couch", "DbRootDir"}, Ini, "."),
BindAddress = proplists:get_value({"Couch", "BindAddress"}, Ini, any),
Port = proplists:get_value({"Couch", "Port"}, Ini, 5984),
DocumentRoot = proplists:get_value({"Couch", "DocumentRoot"}, Ini, "share/www"),
LogFile = proplists:get_value({"Couch", "LogFile"}, Ini, "couchdb.log"),
UtilDriverDir = proplists:get_value({"Couch", "UtilDriverDir"}, Ini, ""),
UpdateNotifierExes = proplists:get_all_values({"Couch", "DbUpdateNotificationProcess"}, Ini),
FtSearchQueryServer = proplists:get_value({"Couch", "FullTextSearchQueryServer"}, Ini, ""),
RemoteRestart = list_to_atom(proplists:get_value({"Couch", "AllowRemoteRestart"}, Ini, "undefined")),
ServerOptions = [{remote_restart, RemoteRestart}],
QueryServers = [{Lang, QueryExe} || {{"Couch Query Servers", Lang}, QueryExe} <- Ini],
ChildProcesses =
[{couch_log,
{couch_log, start_link, [LogFile, LogLevel]},
permanent,
brutal_kill,
worker,
[couch_server]},
{couch_db_update_event,
{gen_event, start_link, [{local, couch_db_update}]},
permanent,
1000,
supervisor,
dynamic},
{couch_server,
{couch_server, sup_start_link, [DbRootDir, ServerOptions]},
permanent,
brutal_kill,
worker,
[couch_server]},
{couch_query_servers,
{couch_query_servers, start_link, [QueryServers]},
permanent,
brutal_kill,
worker,
[couch_query_servers]},
{couch_view,
{couch_view, start_link, [DbRootDir]},
permanent,
brutal_kill,
worker,
[couch_view]},
{couch_httpd,
{couch_httpd, start_link, [BindAddress, Port, DocumentRoot]},
permanent,
1000,
supervisor,
[couch_httpd]}
] ++
lists:map(fun(UpdateNotifierExe) ->
{UpdateNotifierExe,
{couch_db_update_notifier, start_link, [UpdateNotifierExe]},
permanent,
1000,
supervisor,
[couch_db_update_notifier]}
end, UpdateNotifierExes)
++
case FtSearchQueryServer of
"" ->
[];
_ ->
[{couch_ft_query,
{couch_ft_query, start_link, [FtSearchQueryServer]},
permanent,
1000,
supervisor,
[couch_ft_query]}]
end,
io:format("couch ~s (LogLevel=~s)~n", [couch_server:get_version(), LogLevel]),
io:format("~s~n", [ConsoleStartupMsg]),
couch_util:start_driver(UtilDriverDir),
% ensure these applications are running
application:start(inets),
application:start(crypto),
process_flag(trap_exit, true),
StartResult = (catch supervisor:start_link(
{local, couch_server_sup}, couch_server_sup, ChildProcesses)),
ConfigInfo = io_lib:format("Config Info ~s:~n\tCurrentWorkingDir=~s~n" ++
"\tDbRootDir=~s~n" ++
"\tBindAddress=~p~n" ++
"\tPort=~p~n" ++
"\tDocumentRoot=~s~n" ++
"\tLogFile=~s~n" ++
"\tUtilDriverDir=~s~n" ++
"\tDbUpdateNotificationProcesses=~s~n" ++
"\tFullTextSearchQueryServer=~s~n" ++
"~s",
[IniFilename,
Cwd,
DbRootDir,
BindAddress,
Port,
DocumentRoot,
LogFile,
UtilDriverDir,
UpdateNotifierExes,
FtSearchQueryServer,
[lists:flatten(io_lib:format("\t~s=~s~n", [Lang, QueryExe])) || {Lang, QueryExe} <- QueryServers]]),
?LOG_DEBUG("~s", [ConfigInfo]),
case StartResult of
{ok,_} ->
% only output when startup was successful
io:format("Apache CouchDB has started. Time to relax.~n");
_ ->
% Since we failed startup, unconditionally dump configuration data to console
io:format("~s", [ConfigInfo]),
ok
end,
process_flag(trap_exit, false),
StartResult.
stop() ->
catch exit(whereis(couch_server_sup), normal),
couch_log:stop().
init(ChildProcesses) ->
{ok, {{one_for_one, 10, 3600}, ChildProcesses}}.
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