From df38ecb4975f250f7a93b7327f8244d618d5ab99 Mon Sep 17 00:00:00 2001
From: Adam Kocoloski <kocolosk@apache.org>
Date: Fri, 23 Oct 2009 16:49:52 +0000
Subject: improved speed and concurrency of config lookups

git-svn-id: https://svn.apache.org/repos/asf/couchdb/trunk@829123 13f79535-47bb-0310-9956-ffa450edef68
---
 src/couchdb/couch_config.erl | 21 +++++++--------------
 1 file changed, 7 insertions(+), 14 deletions(-)

diff --git a/src/couchdb/couch_config.erl b/src/couchdb/couch_config.erl
index 5d911455..d8473e08 100644
--- a/src/couchdb/couch_config.erl
+++ b/src/couchdb/couch_config.erl
@@ -50,7 +50,8 @@ all() ->
 get(Section) when is_binary(Section) ->
     ?MODULE:get(?b2l(Section));
 get(Section) ->
-    gen_server:call(?MODULE, {get, Section}).
+    Matches = ets:match(?MODULE, {{Section, '$1'}, '$2'}),
+    [{Key, Value} || [Key, Value] <- Matches].
 
 get(Section, Key) ->
     ?MODULE:get(Section, Key, undefined).
@@ -58,8 +59,10 @@ get(Section, Key) ->
 get(Section, Key, Default) when is_binary(Section) and is_binary(Key) ->
     ?MODULE:get(?b2l(Section), ?b2l(Key), Default);
 get(Section, Key, Default) ->
-    gen_server:call(?MODULE, {get, Section, Key, Default}).
-
+    case ets:lookup(?MODULE, {Section, Key}) of
+        [] -> Default;
+        [{_, Match}] -> Match
+    end.
 
 set(Section, Key, Value) ->
     ?MODULE:set(Section, Key, Value, true).
@@ -89,7 +92,7 @@ register(Fun, Pid) ->
 
 
 init(IniFiles) ->
-    ets:new(?MODULE, [named_table, set, private]),
+    ets:new(?MODULE, [named_table, set, protected]),
     lists:map(fun(IniFile) ->
         {ok, ParsedIniValues} = parse_ini_file(IniFile),
         ets:insert(?MODULE, ParsedIniValues)
@@ -108,16 +111,6 @@ terminate(_Reason, _State) ->
 handle_call(all, _From, Config) ->
     Resp = lists:sort((ets:tab2list(?MODULE))),
     {reply, Resp, Config};
-handle_call({get, Section}, _From, Config) ->
-    Matches = ets:match(?MODULE, {{Section, '$1'}, '$2'}),
-    Resp = [{Key, Value} || [Key, Value] <- Matches],
-    {reply, Resp, Config};
-handle_call({get, Section, Key, Default}, _From, Config) ->
-    Resp = case ets:lookup(?MODULE, {Section, Key}) of
-        [] -> Default;
-        [{_, Match}] -> Match
-    end,
-    {reply, Resp, Config};
 handle_call({set, Sec, Key, Val, Persist}, _From, Config) ->
     true = ets:insert(?MODULE, {{Sec, Key}, Val}),
     case {Persist, Config#config.write_filename} of
-- 
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