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-rw-r--r--apps/mem3/src/mem3_cache.erl106
1 files changed, 0 insertions, 106 deletions
diff --git a/apps/mem3/src/mem3_cache.erl b/apps/mem3/src/mem3_cache.erl
deleted file mode 100644
index 6614c29e..00000000
--- a/apps/mem3/src/mem3_cache.erl
+++ /dev/null
@@ -1,106 +0,0 @@
-% Copyright 2010 Cloudant
-%
-% 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(mem3_cache).
--behaviour(gen_server).
--export([init/1, handle_call/3, handle_cast/2, handle_info/2, terminate/2,
- code_change/3]).
-
--export([start_link/0]).
-
--record(state, {changes_pid}).
-
--include("mem3.hrl").
--include_lib("couch/include/couch_db.hrl").
-
-start_link() ->
- gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
-
-init([]) ->
- ets:new(partitions, [bag, public, named_table, {keypos,#shard.dbname}]),
- {Pid, _} = spawn_monitor(fun() -> listen_for_changes(0) end),
- {ok, #state{changes_pid = Pid}}.
-
-handle_call(_Call, _From, State) ->
- {noreply, State}.
-
-handle_cast(_Msg, State) ->
- {noreply, State}.
-
-handle_info({'DOWN', _, _, Pid, {badarg, [{ets,delete,[partitions,_]}|_]}},
- #state{changes_pid=Pid} = State) ->
- % fatal error, somebody deleted our ets table
- {stop, ets_table_error, State};
-handle_info({'DOWN', _, _, Pid, Reason}, #state{changes_pid=Pid} = State) ->
- ?LOG_INFO("~p changes listener died ~p", [?MODULE, Reason]),
- Seq = case Reason of {seq, EndSeq} -> EndSeq; _ -> 0 end,
- erlang:send_after(5000, self(), {start_listener, Seq}),
- {noreply, State};
-handle_info({start_listener, Seq}, State) ->
- {NewPid, _} = spawn_monitor(fun() -> listen_for_changes(Seq) end),
- {noreply, State#state{changes_pid=NewPid}};
-handle_info(_Msg, State) ->
- {noreply, State}.
-
-terminate(_Reason, #state{changes_pid=Pid}) ->
- exit(Pid, kill),
- ok.
-
-code_change(_OldVsn, State, _Extra) ->
- {ok, State}.
-
-%% internal functions
-
-listen_for_changes(Since) ->
- DbName = ?l2b(couch_config:get("mem3", "db", "dbs")),
- {ok, Db} = ensure_exists(DbName),
- Args = #changes_args{
- feed = "continuous",
- since = Since,
- heartbeat = true,
- include_docs = true
- },
- ChangesFun = couch_changes:handle_changes(Args, nil, Db),
- ChangesFun(fun changes_callback/2).
-
-ensure_exists(DbName) ->
- Options = [{user_ctx, #user_ctx{roles=[<<"_admin">>]}}],
- case couch_db:open(DbName, Options) of
- {ok, Db} ->
- {ok, Db};
- _ ->
- couch_server:create(DbName, Options)
- end.
-
-changes_callback(start, _) ->
- {ok, nil};
-changes_callback({stop, EndSeq}, _) ->
- exit({seq, EndSeq});
-changes_callback({change, {Change}, _}, _) ->
- DbName = couch_util:get_value(<<"id">>, Change),
- case couch_util:get_value(deleted, Change, false) of
- true ->
- ets:delete(partitions, DbName);
- false ->
- case couch_util:get_value(doc, Change) of
- {error, Reason} ->
- ?LOG_ERROR("missing partition table for ~s: ~p", [DbName, Reason]);
- {Doc} ->
- ets:delete(partitions, DbName),
- ets:insert(partitions, mem3_util:build_shards(DbName, Doc))
- end
- end,
- {ok, couch_util:get_value(<<"seq">>, Change)};
-changes_callback(timeout, _) ->
- {ok, nil}.