refactor soft deletion of search index

Author: jiangphcn

src/dreyfus/src/clouseau_rpc.erl

@@ -20,7 +20,7 @@
 -export([open_index/3]).
 -export([await/2, commit/2, get_update_seq/1, info/1, search/2]).
 -export([group1/7, group2/2]).
--export([delete/2, update/3, cleanup/1, cleanup/2, rename/1]).
+-export([delete/2, soft_delete/1, update/3, cleanup/1, cleanup/2]).
 -export([analyze/2, version/0, disk_size/1]).
 -export([set_purge_seq/2, get_purge_seq/1, get_root_dir/0, close_lru/0, close_lru/1]).
 -export([connected/0]).
@@ -78,16 +78,15 @@ group2(Ref, Args) ->
 delete(Ref, Id) ->
     rpc(Ref, {delete, couch_util:to_binary(Id)}).
 
+soft_delete(DbName) ->
+    gen_server:cast({cleanup, clouseau()}, {soft_delete, DbName}).
+
 update(Ref, Id, Fields) ->
     rpc(Ref, {update, Id, Fields}).
 
 cleanup(DbName) ->
     gen_server:cast({cleanup, clouseau()}, {cleanup, DbName}).
 
-rename(DbName) ->
-  close_lru(DbName),
-  gen_server:cast({cleanup, clouseau()}, {rename, DbName}).
-
 cleanup(DbName, ActiveSigs) ->
     gen_server:cast({cleanup, clouseau()}, {cleanup, DbName, ActiveSigs}).
 

src/dreyfus/src/dreyfus_index_manager.erl

@@ -84,8 +84,8 @@ handle_cast({cleanup, DbName}, State) ->
     clouseau_rpc:cleanup(DbName),
     {noreply, State};
 
-handle_cast({rename, DbName}, State) ->
-    clouseau_rpc:rename(DbName),
+handle_cast({soft_delete, DbName}, State) ->
+    clouseau_rpc:soft_delete(DbName),
     {noreply, State}.
 
 handle_info({'EXIT', FromPid, Reason}, State) ->
@@ -122,10 +122,9 @@ handle_db_event(DbName, deleted, _St) ->
     RecoveryEnabled = config:get_boolean("couchdb",
         "enable_database_recovery", false),
     case RecoveryEnabled of
-        true ->
-            clouseau_rpc:close_lru(DbName),
-            gen_server:cast(?MODULE, {rename, DbName});
         false ->
+            gen_server:cast(?MODULE, {soft_delete, DbName});
+        true ->
             gen_server:cast(?MODULE, {cleanup, DbName})
     end,