diff options
Diffstat (limited to 'apps/fabric/src/fabric_view_map.erl')
| -rw-r--r-- | apps/fabric/src/fabric_view_map.erl | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/apps/fabric/src/fabric_view_map.erl b/apps/fabric/src/fabric_view_map.erl deleted file mode 100644 index e1210a84..00000000 --- a/apps/fabric/src/fabric_view_map.erl +++ /dev/null @@ -1,151 +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(fabric_view_map). - --export([go/6]). - --include("fabric.hrl"). --include_lib("mem3/include/mem3.hrl"). --include_lib("couch/include/couch_db.hrl"). - -go(DbName, GroupId, View, Args, Callback, Acc0) when is_binary(GroupId) -> - {ok, DDoc} = fabric:open_doc(DbName, <<"_design/", GroupId/binary>>, []), - go(DbName, DDoc, View, Args, Callback, Acc0); - -go(DbName, DDoc, View, Args, Callback, Acc0) -> - Workers = lists:map(fun(#shard{name=Name, node=Node} = Shard) -> - Ref = rexi:cast(Node, {fabric_rpc, map_view, [Name, DDoc, View, Args]}), - Shard#shard{ref = Ref} - end, mem3:shards(DbName)), - BufferSize = couch_config:get("fabric", "map_buffer_size", "2"), - #view_query_args{limit = Limit, skip = Skip, keys = Keys} = Args, - State = #collector{ - query_args = Args, - callback = Callback, - buffer_size = list_to_integer(BufferSize), - counters = fabric_dict:init(Workers, 0), - skip = Skip, - limit = Limit, - keys = fabric_view:keydict(Keys), - sorted = Args#view_query_args.sorted, - user_acc = Acc0 - }, - try rexi_utils:recv(Workers, #shard.ref, fun handle_message/3, - State, infinity, 1000 * 60 * 60) of - {ok, NewState} -> - {ok, NewState#collector.user_acc}; - Error -> - Error - after - fabric_util:cleanup(Workers) - end. - -handle_message({rexi_DOWN, _, _, _}, nil, State) -> - % TODO see if progress can be made here, possibly by removing all shards - % from that node and checking is_progress_possible - {ok, State}; - -handle_message({rexi_EXIT, Reason}, Worker, State) -> - ?LOG_ERROR("~p rexi_EXIT ~p", [?MODULE, Reason]), - #collector{callback=Callback, counters=Counters0, user_acc=Acc} = State, - Counters = fabric_dict:erase(Worker, Counters0), - case fabric_view:is_progress_possible(Counters) of - true -> - {ok, State#collector{counters = Counters}}; - false -> - Callback({error, dead_shards}, Acc), - {error, dead_shards} - end; - -handle_message({total_and_offset, Tot, Off}, {Worker, From}, State) -> - #collector{ - callback = Callback, - counters = Counters0, - total_rows = Total0, - offset = Offset0, - user_acc = AccIn - } = State, - case fabric_dict:lookup_element(Worker, Counters0) of - undefined -> - % this worker lost the race with other partition copies, terminate - gen_server:reply(From, stop), - {ok, State}; - 0 -> - gen_server:reply(From, ok), - Counters1 = fabric_dict:update_counter(Worker, 1, Counters0), - Counters2 = fabric_view:remove_overlapping_shards(Worker, Counters1), - Total = Total0 + Tot, - Offset = Offset0 + Off, - case fabric_dict:any(0, Counters2) of - true -> - {ok, State#collector{ - counters = Counters2, - total_rows = Total, - offset = Offset - }}; - false -> - FinalOffset = erlang:min(Total, Offset+State#collector.skip), - {Go, Acc} = Callback({total_and_offset, Total, FinalOffset}, AccIn), - {Go, State#collector{ - counters = fabric_dict:decrement_all(Counters2), - total_rows = Total, - offset = FinalOffset, - user_acc = Acc - }} - end - end; - -handle_message(#view_row{}, {_, _}, #collector{limit=0} = State) -> - #collector{callback=Callback} = State, - {_, Acc} = Callback(complete, State#collector.user_acc), - {stop, State#collector{user_acc=Acc}}; - -handle_message(#view_row{} = Row, {_,From}, #collector{sorted=false} = St) -> - #collector{callback=Callback, user_acc=AccIn, limit=Limit} = St, - {Go, Acc} = Callback(fabric_view:transform_row(Row), AccIn), - gen_server:reply(From, ok), - {Go, St#collector{user_acc=Acc, limit=Limit-1}}; - -handle_message(#view_row{} = Row, {Worker, From}, State) -> - #collector{ - query_args = #view_query_args{direction=Dir}, - counters = Counters0, - rows = Rows0, - keys = KeyDict - } = State, - Rows = merge_row(Dir, KeyDict, Row#view_row{worker=Worker}, Rows0), - Counters1 = fabric_dict:update_counter(Worker, 1, Counters0), - State1 = State#collector{rows=Rows, counters=Counters1}, - State2 = fabric_view:maybe_pause_worker(Worker, From, State1), - fabric_view:maybe_send_row(State2); - -handle_message(complete, Worker, State) -> - Counters = fabric_dict:update_counter(Worker, 1, State#collector.counters), - fabric_view:maybe_send_row(State#collector{counters = Counters}). - -merge_row(fwd, undefined, Row, Rows) -> - lists:merge(fun(#view_row{key=KeyA, id=IdA}, #view_row{key=KeyB, id=IdB}) -> - couch_view:less_json([KeyA, IdA], [KeyB, IdB]) - end, [Row], Rows); -merge_row(rev, undefined, Row, Rows) -> - lists:merge(fun(#view_row{key=KeyA, id=IdA}, #view_row{key=KeyB, id=IdB}) -> - couch_view:less_json([KeyB, IdB], [KeyA, IdA]) - end, [Row], Rows); -merge_row(_, KeyDict, Row, Rows) -> - lists:merge(fun(#view_row{key=A, id=IdA}, #view_row{key=B, id=IdB}) -> - if A =:= B -> IdA < IdB; true -> - dict:fetch(A, KeyDict) < dict:fetch(B, KeyDict) - end - end, [Row], Rows). |