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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(nouveau_index_updater).
-include_lib("couch/include/couch_db.hrl").
-include("nouveau.hrl").
%% public api
-export([outdated/1]).
%% callbacks
-export([update/1]).
-import(couch_query_servers, [get_os_process/1, ret_os_process/1, proc_prompt/2]).
-import(nouveau_util, [index_path/1]).
outdated(#index{} = Index) ->
case open_or_create_index(Index) of
{ok, IndexSeq} ->
DbSeq = get_db_seq(Index),
DbSeq > IndexSeq;
{error, Reason} ->
{error, Reason}
end.
update(#index{} = Index) ->
{ok, Db} = couch_db:open_int(Index#index.dbname, []),
try
case open_or_create_index(Index) of
{error, Reason} ->
exit({error, Reason});
{ok, CurSeq} ->
TotalChanges = couch_db:count_changes_since(Db, CurSeq),
couch_task_status:add_task([
{type, search_indexer},
{database, Index#index.dbname},
{design_document, Index#index.ddoc_id},
{index, Index#index.name},
{progress, 0},
{changes_done, 0},
{total_changes, TotalChanges}
]),
%% update status every half second
couch_task_status:set_update_frequency(500),
Proc = get_os_process(Index#index.def_lang),
try
true = proc_prompt(Proc, [<<"add_fun">>, Index#index.def, <<"nouveau">>]),
Acc0 = {Db, Index, Proc, 0, TotalChanges},
{ok, _} = couch_db:fold_changes(Db, CurSeq, fun load_docs/2, Acc0, [])
after
ret_os_process(Proc)
end
end
after
couch_db:close(Db)
end.
load_docs(#full_doc_info{id = <<"_design/", _/binary>>}, Acc) ->
{ok, Acc};
load_docs(FDI, {Db, Index, Proc, ChangesDone, TotalChanges}) ->
couch_task_status:update([
{changes_done, ChangesDone}, {progress, (ChangesDone * 100) div TotalChanges}
]),
DI = couch_doc:to_doc_info(FDI),
#doc_info{id = Id, high_seq = Seq, revs = [#rev_info{deleted = Del} | _]} = DI,
case Del of
true ->
ok = nouveau_api:delete_doc(Index, Id, Seq);
false ->
{ok, Doc} = couch_db:open_doc(Db, DI, []),
Json = couch_doc:to_json_obj(Doc, []),
[Fields | _] = proc_prompt(Proc, [<<"nouveau_index_doc">>, Json]),
Partition =
case couch_db:is_partitioned(Db) of
true ->
couch_partition:from_docid(Id);
false ->
null
end,
case Fields of
[] ->
ok = nouveau_api:delete_doc(Index, Id, Seq);
_ ->
case nouveau_api:update_doc(Index, Id, Seq, Partition, Fields) of
ok ->
ok;
{error, Reason} ->
exit({error, Reason})
end
end
end,
{ok, {Db, Index, Proc, ChangesDone + 1, TotalChanges}}.
open_or_create_index(#index{} = Index) ->
case get_index_seq(Index) of
{ok, UpdateSeq} ->
{ok, UpdateSeq};
{error, {not_found, _}} ->
case nouveau_api:create_index(Index, index_definition(Index)) of
ok ->
{ok, 0};
{error, Reason} ->
{error, Reason}
end;
{error, Reason} ->
{error, Reason}
end.
get_db_seq(#index{} = Index) ->
{ok, Db} = couch_db:open_int(Index#index.dbname, []),
try
couch_db:get_update_seq(Db)
after
couch_db:close(Db)
end.
get_index_seq(#index{} = Index) ->
case nouveau_api:index_info(Index) of
{ok, #{<<"update_seq">> := Seq}} ->
{ok, Seq};
{error, Reason} ->
{error, Reason}
end.
index_definition(#index{} = Index) ->
#{
<<"default_analyzer">> => Index#index.default_analyzer,
<<"field_analyzers">> => Index#index.field_analyzers
}.
|
