From 544a38dd45f6a58d34296c6c768afd086eb2ac70 Mon Sep 17 00:00:00 2001
From: Christopher Lenz <cmlenz@apache.org>
Date: Fri, 28 Mar 2008 23:32:19 +0000
Subject: Imported trunk.

git-svn-id: https://svn.apache.org/repos/asf/incubator/couchdb/trunk@642432 13f79535-47bb-0310-9956-ffa450edef68
---
 src/couch_inets/httpd_sup.erl | 137 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 src/couch_inets/httpd_sup.erl

(limited to 'src/couch_inets/httpd_sup.erl')

diff --git a/src/couch_inets/httpd_sup.erl b/src/couch_inets/httpd_sup.erl
new file mode 100644
index 00000000..94573394
--- /dev/null
+++ b/src/couch_inets/httpd_sup.erl
@@ -0,0 +1,137 @@
+%% ``The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved via the world wide web at http://www.erlang.org/.
+%% 
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%% 
+%% The Initial Developer of the Original Code is Ericsson Utvecklings AB.
+%% Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
+%% AB. All Rights Reserved.''
+%% 
+%%     $Id$
+%%
+%%----------------------------------------------------------------------
+%% Purpose: The top supervisor for the http server (httpd) hangs under 
+%%          inets_sup.
+%%----------------------------------------------------------------------
+
+-module(httpd_sup).
+
+-behaviour(supervisor).
+
+%% API
+-export([start_link/1]).
+-export([start_child/1, stop_child/2]).
+
+%% Supervisor callback
+-export([init/1]).
+
+
+%%%=========================================================================
+%%%  API
+%%%=========================================================================
+start_link(HttpdServices) ->
+    supervisor:start_link({local, ?MODULE}, ?MODULE, [HttpdServices]).
+
+start_child(ConfigFile) ->
+    {ok, Spec} = httpd_child_spec(ConfigFile, 15000, []),
+    supervisor:start_child(?MODULE, Spec).
+    
+stop_child(Addr, Port) ->
+    Name = {httpd_instance_sup, Addr, Port},
+    case supervisor:terminate_child(?MODULE, Name) of
+        ok ->
+            supervisor:delete_child(?MODULE, Name);
+        Error ->
+            Error
+    end.
+    
+%%%=========================================================================
+%%%  Supervisor callback
+%%%=========================================================================
+init([HttpdServices]) ->
+    RestartStrategy = one_for_one,
+    MaxR = 10,
+    MaxT = 3600,
+    Children = child_spec(HttpdServices, []),
+    {ok, {{RestartStrategy, MaxR, MaxT}, Children}}.
+
+%%%=========================================================================
+%%%  Internal functions
+%%%=========================================================================
+%% The format of the httpd service is:
+%% httpd_service() -> {httpd,httpd()}
+%% httpd()         -> [httpd_config()] | file()
+%% httpd_config()  -> {file,file()} |
+%%                    {debug,debug()} |
+%%                    {accept_timeout,integer()}
+%% debug()         -> disable | [debug_options()]
+%% debug_options() -> {all_functions,modules()} | 
+%%                    {exported_functions,modules()} |
+%%                    {disable,modules()}
+%% modules()       -> [atom()]
+child_spec([], Acc) ->
+    Acc;
+child_spec([{httpd, HttpdService} | Rest], Acc) ->
+    NewHttpdService = mk_tuple_list(HttpdService),
+    %%    Acc2 = child_spec2(NewHttpdService,Acc),
+    NewAcc=
+	case catch child_spec2(NewHttpdService) of
+	    {ok,Acc2} ->
+		[Acc2|Acc];
+	    {error,Reason} ->
+		error_msg("failed to create child spec for ~n~p~ndue to: ~p",
+			  [HttpdService,Reason]),
+%		exit({error,Reason})
+		Acc
+	end,
+    child_spec(Rest,NewAcc).
+
+child_spec2(HttpdService) ->
+    Debug = http_util:key1search(HttpdService,debug,[]),
+    AcceptTimeout = http_util:key1search(HttpdService,accept_timeout,15000),
+    ConfigFile =
+    case http_util:key1search(HttpdService,file) of
+	undefined -> throw({error,{mandatory_conf_file_missed}});
+	File -> File
+    end,
+    httpd_util:valid_options(Debug,AcceptTimeout,ConfigFile),
+    httpd_child_spec(ConfigFile,AcceptTimeout,Debug).
+
+
+httpd_child_spec(ConfigFile,AcceptTimeout,Debug) ->
+    case httpd_conf:load(ConfigFile) of
+	{ok, ConfigList} ->
+	    Port = httpd_util:key1search(ConfigList, port, 80),
+	    Addr = httpd_util:key1search(ConfigList, bind_address),
+	    {ok, httpd_child_spec(ConfigFile, AcceptTimeout, 
+				  Debug, Addr, Port)};
+	Error ->
+	    Error
+    end.
+
+httpd_child_spec(ConfigFile, AcceptTimeout, Debug, Addr, Port) ->
+    Name = {httpd_instance_sup, Addr, Port},
+    StartFunc = {httpd_instance_sup, start_link,
+		 [ConfigFile,AcceptTimeout,Debug]},
+    Restart = permanent, 
+    Shutdown = infinity,
+    Modules = [httpd_instance_sup],
+    Type = supervisor,
+    {Name, StartFunc, Restart, Shutdown, Type, Modules}.
+
+
+mk_tuple_list([]) ->
+    [];
+mk_tuple_list([H={_,_}|T]) ->
+    [H|mk_tuple_list(T)];
+mk_tuple_list(F) ->
+    [{file,F}].
+
+error_msg(F, A) ->
+    error_logger:error_msg(F ++ "~n", A).
-- 
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