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% 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_db_delete).
-export([go/2]).
-include("fabric.hrl").
-include_lib("mem3/include/mem3.hrl").
go(DbName, Options) ->
Shards = mem3:shards(DbName),
Workers = fabric_util:submit_jobs(Shards, delete_db, [Options, DbName]),
Acc0 = fabric_dict:init(Workers, nil),
case fabric_util:recv(Workers, #shard.ref, fun handle_message/3, Acc0) of
{ok, ok} ->
ok;
{ok, not_found} ->
erlang:error(database_does_not_exist);
Error ->
Error
end.
handle_message(Msg, Shard, Counters) ->
C1 = fabric_dict:store(Shard, Msg, Counters),
case fabric_dict:any(nil, C1) of
true ->
{ok, C1};
false ->
final_answer(C1)
end.
final_answer(Counters) ->
Successes = [X || {_, M} = X <- Counters, M == ok orelse M == not_found],
case fabric_view:is_progress_possible(Successes) of
true ->
case lists:keymember(ok, 2, Successes) of
true ->
{stop, ok};
false ->
{stop, not_found}
end;
false ->
{error, internal_server_error}
end.
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