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Diffstat (limited to 'apps/fabric/src/fabric_doc_open.erl')
| -rw-r--r-- | apps/fabric/src/fabric_doc_open.erl | 120 |
1 files changed, 0 insertions, 120 deletions
diff --git a/apps/fabric/src/fabric_doc_open.erl b/apps/fabric/src/fabric_doc_open.erl deleted file mode 100644 index dd4917b9..00000000 --- a/apps/fabric/src/fabric_doc_open.erl +++ /dev/null @@ -1,120 +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_doc_open). - --export([go/3]). - --include("fabric.hrl"). --include_lib("mem3/include/mem3.hrl"). --include_lib("couch/include/couch_db.hrl"). - -go(DbName, Id, Options) -> - Workers = fabric_util:submit_jobs(mem3:shards(DbName,Id), open_doc, - [Id, [deleted|Options]]), - SuppressDeletedDoc = not lists:member(deleted, Options), - R = couch_util:get_value(r, Options, couch_config:get("cluster","r","2")), - RepairOpts = [{r, integer_to_list(mem3:n(DbName))} | Options], - Acc0 = {length(Workers), list_to_integer(R), []}, - case fabric_util:recv(Workers, #shard.ref, fun handle_message/3, Acc0) of - {ok, Reply} -> - format_reply(Reply, SuppressDeletedDoc); - {error, needs_repair, Reply} -> - spawn(fabric, open_revs, [DbName, Id, all, RepairOpts]), - format_reply(Reply, SuppressDeletedDoc); - {error, needs_repair} -> - % we couldn't determine the correct reply, so we'll run a sync repair - {ok, Results} = fabric:open_revs(DbName, Id, all, RepairOpts), - case lists:partition(fun({ok, #doc{deleted=Del}}) -> Del end, Results) of - {[], []} -> - {not_found, missing}; - {_DeletedDocs, []} when SuppressDeletedDoc -> - {not_found, deleted}; - {DeletedDocs, []} -> - lists:last(lists:sort(DeletedDocs)); - {_, LiveDocs} -> - lists:last(lists:sort(LiveDocs)) - end; - Error -> - Error - end. - -format_reply({ok, #doc{deleted=true}}, true) -> - {not_found, deleted}; -format_reply(Else, _) -> - Else. - -handle_message({rexi_DOWN, _, _, _}, _Worker, Acc0) -> - skip_message(Acc0); -handle_message({rexi_EXIT, _Reason}, _Worker, Acc0) -> - skip_message(Acc0); -handle_message(Reply, _Worker, {WaitingCount, R, Replies}) -> - NewReplies = orddict:update_counter(Reply, 1, Replies), - Reduced = fabric_util:remove_ancestors(NewReplies, []), - case lists:dropwhile(fun({_, Count}) -> Count < R end, Reduced) of - [{QuorumReply, _} | _] -> - if length(NewReplies) =:= 1 -> - {stop, QuorumReply}; - true -> - % we had some disagreement amongst the workers, so repair is useful - {error, needs_repair, QuorumReply} - end; - [] -> - if WaitingCount =:= 1 -> - {error, needs_repair}; - true -> - {ok, {WaitingCount-1, R, NewReplies}} - end - end. - -skip_message({1, _R, _Replies}) -> - {error, needs_repair}; -skip_message({WaitingCount, R, Replies}) -> - {ok, {WaitingCount-1, R, Replies}}. - - -open_doc_test() -> - Foo1 = {ok, #doc{revs = {1,[<<"foo">>]}}}, - Foo2 = {ok, #doc{revs = {2,[<<"foo2">>,<<"foo">>]}}}, - Bar1 = {ok, #doc{revs = {1,[<<"bar">>]}}}, - Baz1 = {ok, #doc{revs = {1,[<<"baz">>]}}}, - NF = {not_found, missing}, - State0 = {3, 2, []}, - State1 = {2, 2, [{Foo1,1}]}, - State2 = {1, 2, [{Bar1,1}, {Foo1,1}]}, - ?assertEqual({ok, State1}, handle_message(Foo1, nil, State0)), - - % normal case - quorum reached, no disagreement - ?assertEqual({stop, Foo1}, handle_message(Foo1, nil, State1)), - - % 2nd worker disagrees, voting continues - ?assertEqual({ok, State2}, handle_message(Bar1, nil, State1)), - - % 3rd worker resolves voting, but repair is needed - ?assertEqual({error, needs_repair, Foo1}, handle_message(Foo1, nil, State2)), - - % 2nd worker comes up with descendant of Foo1, voting resolved, run repair - ?assertEqual({error, needs_repair, Foo2}, handle_message(Foo2, nil, State1)), - - % not_found is considered to be an ancestor of everybody - ?assertEqual({error, needs_repair, Foo1}, handle_message(NF, nil, State1)), - - % 3 distinct edit branches result in quorum failure - ?assertEqual({error, needs_repair}, handle_message(Baz1, nil, State2)), - - % bad node concludes voting w/o success, run sync repair to get the result - ?assertEqual( - {error, needs_repair}, - handle_message({rexi_DOWN, 1, 2, 3}, nil, State2) - ). |