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% 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.
%% -*- erlang-indent-level: 4;indent-tabs-mode: nil -*-
-module(dreyfus_rpc).
-include_lib("couch/include/couch_db.hrl").
-include("dreyfus.hrl").
-import(couch_query_servers, [get_os_process/1, ret_os_process/1, proc_prompt/2]).
% public api.
-export([search/4, group1/4, group2/4, info/3, disk_size/3]).
% private callback
-export([call/5, info_int/3]).
search(DbName, DDoc, IndexName, QueryArgs) ->
MFA = {?MODULE, call, [search, DbName, DDoc, IndexName, QueryArgs]},
dreyfus_util:time([rpc, search], MFA).
group1(DbName, DDoc, IndexName, QueryArgs) ->
MFA = {?MODULE, call, [group1, DbName, DDoc, IndexName, QueryArgs]},
dreyfus_util:time([rpc, group1], MFA).
group2(DbName, DDoc, IndexName, QueryArgs) ->
MFA = {?MODULE, call, [group2, DbName, DDoc, IndexName, QueryArgs]},
dreyfus_util:time([rpc, group2], MFA).
call(Fun, DbName, DDoc, IndexName, QueryArgs0) ->
QueryArgs = dreyfus_util:upgrade(QueryArgs0),
erlang:put(io_priority, {search, DbName}),
check_interactive_mode(),
{ok, Db} = get_or_create_db(DbName, []),
#index_query_args{
stale = Stale
} = QueryArgs,
{_LastSeq, MinSeq} = calculate_seqs(Db, Stale),
case dreyfus_index:design_doc_to_index(DDoc, IndexName) of
{ok, Index} ->
case dreyfus_index_manager:get_index(DbName, Index) of
{ok, Pid} ->
case dreyfus_index:await(Pid, MinSeq) of
{ok, IndexPid, _Seq} ->
Result = dreyfus_index:Fun(IndexPid, QueryArgs),
rexi:reply(Result);
% obsolete clauses, remove after upgrade
ok ->
Result = dreyfus_index:Fun(Pid, QueryArgs),
rexi:reply(Result);
{ok, _Seq} ->
Result = dreyfus_index:Fun(Pid, QueryArgs),
rexi:reply(Result);
Error ->
rexi:reply(Error)
end;
Error ->
rexi:reply(Error)
end;
Error ->
rexi:reply(Error)
end.
info(DbName, DDoc, IndexName) ->
MFA = {?MODULE, info_int, [DbName, DDoc, IndexName]},
dreyfus_util:time([rpc, info], MFA).
info_int(DbName, DDoc, IndexName) ->
erlang:put(io_priority, {search, DbName}),
check_interactive_mode(),
case dreyfus_index:design_doc_to_index(DDoc, IndexName) of
{ok, Index} ->
case dreyfus_index_manager:get_index(DbName, Index) of
{ok, Pid} ->
Result = dreyfus_index:info(Pid),
rexi:reply(Result);
Error ->
rexi:reply(Error)
end;
Error ->
rexi:reply(Error)
end.
disk_size(DbName, DDoc, IndexName) ->
erlang:put(io_priority, {search, DbName}),
check_interactive_mode(),
case dreyfus_index:design_doc_to_index(DDoc, IndexName) of
{ok, Index} ->
Result = dreyfus_index_manager:get_disk_size(DbName, Index),
rexi:reply(Result);
Error ->
rexi:reply(Error)
end.
get_or_create_db(DbName, Options) ->
case couch_db:open_int(DbName, Options) of
{not_found, no_db_file} ->
couch_log:warning("~p creating ~s", [?MODULE, DbName]),
mem3_util:get_or_create_db(DbName, Options);
Else ->
Else
end.
calculate_seqs(Db, Stale) ->
LastSeq = couch_db:get_update_seq(Db),
if
Stale == ok orelse Stale == update_after ->
{LastSeq, 0};
true ->
{LastSeq, LastSeq}
end.
check_interactive_mode() ->
case config:get("couchdb", "maintenance_mode", "false") of
"true" ->
% Do this to avoid log spam from rexi_server
rexi:reply({rexi_EXIT, {maintenance_mode, node()}}),
exit(normal);
_ ->
ok
end.
|
