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+%% The contents of this file are subject to the Mozilla Public License
+%% Version 1.1 (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.mozilla.org/MPL/
+%%
+%% 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 Original Code is RabbitMQ.
+%%
+%% The Initial Developers of the Original Code are LShift Ltd,
+%% Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
+%%
+%% Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
+%% Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
+%% are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
+%% Technologies LLC, and Rabbit Technologies Ltd.
+%%
+%% Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
+%% Ltd. Portions created by Cohesive Financial Technologies LLC are
+%% Copyright (C) 2007-2010 Cohesive Financial Technologies
+%% LLC. Portions created by Rabbit Technologies Ltd are Copyright
+%% (C) 2007-2010 Rabbit Technologies Ltd.
+%%
+%% All Rights Reserved.
+%%
+%% Contributor(s): ______________________________________.
+%%
+
+-module(rabbit_msg_store_ets_index).
+
+-behaviour(rabbit_msg_store_index).
+
+-export([new/1, recover/1,
+ lookup/2, insert/2, update/2, update_fields/3, delete/2,
+ delete_by_file/2, terminate/1]).
+
+-define(MSG_LOC_NAME, rabbit_msg_store_ets_index).
+-define(FILENAME, "msg_store_index.ets").
+
+-include("rabbit_msg_store_index.hrl").
+
+-record(state, { table, dir }).
+
+new(Dir) ->
+ file:delete(filename:join(Dir, ?FILENAME)),
+ Tid = ets:new(?MSG_LOC_NAME, [set, public, {keypos, #msg_location.guid}]),
+ #state { table = Tid, dir = Dir }.
+
+recover(Dir) ->
+ Path = filename:join(Dir, ?FILENAME),
+ case ets:file2tab(Path) of
+ {ok, Tid} -> file:delete(Path),
+ {ok, #state { table = Tid, dir = Dir }};
+ Error -> Error
+ end.
+
+lookup(Key, State) ->
+ case ets:lookup(State #state.table, Key) of
+ [] -> not_found;
+ [Entry] -> Entry
+ end.
+
+insert(Obj, State) ->
+ true = ets:insert_new(State #state.table, Obj),
+ ok.
+
+update(Obj, State) ->
+ true = ets:insert(State #state.table, Obj),
+ ok.
+
+update_fields(Key, Updates, State) ->
+ true = ets:update_element(State #state.table, Key, Updates),
+ ok.
+
+delete(Key, State) ->
+ true = ets:delete(State #state.table, Key),
+ ok.
+
+delete_by_file(File, State) ->
+ MatchHead = #msg_location { file = File, _ = '_' },
+ ets:select_delete(State #state.table, [{MatchHead, [], [true]}]),
+ ok.
+
+terminate(#state { table = MsgLocations, dir = Dir }) ->
+ ok = ets:tab2file(MsgLocations, filename:join(Dir, ?FILENAME),
+ [{extended_info, [object_count]}]),
+ ets:delete(MsgLocations).