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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_index_updater).
-include_lib("couch/include/couch_db.hrl").
-include("dreyfus.hrl").
-export([update/2, load_docs/2]).
-import(couch_query_servers, [get_os_process/1, ret_os_process/1, proc_prompt/2]).
update(IndexPid, Index) ->
#index{
current_seq = CurSeq,
dbname = DbName,
ddoc_id = DDocId,
name = IndexName
} = Index,
erlang:put(io_priority, {search, DbName, IndexName}),
{ok, Db} = couch_db:open_int(DbName, []),
try
TotalUpdateChanges = couch_db:count_changes_since(Db, CurSeq),
TotalPurgeChanges = count_pending_purged_docs_since(Db, IndexPid),
TotalChanges = TotalUpdateChanges + TotalPurgeChanges,
couch_task_status:add_task([
{type, search_indexer},
{database, DbName},
{design_document, DDocId},
{index, IndexName},
{progress, 0},
{changes_done, 0},
{total_changes, TotalChanges}
]),
%% update status every half second
couch_task_status:set_update_frequency(500),
%ExcludeIdRevs is [{Id1, Rev1}, {Id2, Rev2}, ...]
%The Rev is the final Rev, not purged Rev.
{ok, ExcludeIdRevs} = purge_index(Db, IndexPid, Index),
%% compute on all docs modified since we last computed.
NewCurSeq = couch_db:get_update_seq(Db),
Proc = get_os_process(Index#index.def_lang),
try
true = proc_prompt(Proc, [<<"add_fun">>, Index#index.def]),
EnumFun = fun ?MODULE:load_docs/2,
[Changes] = couch_task_status:get([changes_done]),
Acc0 = {Changes, IndexPid, Db, Proc, TotalChanges, now(), ExcludeIdRevs},
{ok, _} = couch_db:fold_changes(Db, CurSeq, EnumFun, Acc0, []),
ok = clouseau_rpc:commit(IndexPid, NewCurSeq)
after
ret_os_process(Proc)
end,
exit({updated, NewCurSeq})
after
couch_db:close(Db)
end.
load_docs(FDI, {I, IndexPid, Db, Proc, Total, LastCommitTime, ExcludeIdRevs}=Acc) ->
couch_task_status:update([{changes_done, I}, {progress, (I * 100) div Total}]),
DI = couch_doc:to_doc_info(FDI),
#doc_info{id=Id, high_seq=Seq, revs=[#rev_info{rev=Rev}|_]} = DI,
%check if it is processed in purge_index to avoid update the index again.
case lists:member({Id, Rev}, ExcludeIdRevs) of
true -> ok;
false -> update_or_delete_index(IndexPid, Db, DI, Proc)
end,
%% Force a commit every minute
case timer:now_diff(Now = now(), LastCommitTime) >= 60000000 of
true ->
ok = clouseau_rpc:commit(IndexPid, Seq),
{ok, {I+1, IndexPid, Db, Proc, Total, Now, ExcludeIdRevs}};
false ->
{ok, setelement(1, Acc, I+1)}
end.
purge_index(Db, IndexPid, Index) ->
{ok, IdxPurgeSeq} = clouseau_rpc:get_purge_seq(IndexPid),
Proc = get_os_process(Index#index.def_lang),
try
true = proc_prompt(Proc, [<<"add_fun">>, Index#index.def]),
FoldFun = fun({PurgeSeq, _UUID, Id, _Revs}, {Acc, _}) ->
Acc0 = case couch_db:get_full_doc_info(Db, Id) of
not_found ->
ok = clouseau_rpc:delete(IndexPid, Id),
Acc;
FDI ->
DI = couch_doc:to_doc_info(FDI),
#doc_info{id=Id, revs=[#rev_info{rev=Rev}|_]} = DI,
case lists:member({Id, Rev}, Acc) of
true -> Acc;
false ->
update_or_delete_index(IndexPid, Db, DI, Proc),
[{Id, Rev} | Acc]
end
end,
update_task(1),
{ok, {Acc0, PurgeSeq}}
end,
{ok, {ExcludeList, NewPurgeSeq}} = couch_db:fold_purge_infos(
Db, IdxPurgeSeq, FoldFun, {[], 0}, []),
clouseau_rpc:set_purge_seq(IndexPid, NewPurgeSeq),
update_local_doc(Db, Index, NewPurgeSeq),
{ok, ExcludeList}
after
ret_os_process(Proc)
end.
count_pending_purged_docs_since(Db, IndexPid) ->
DbPurgeSeq = couch_db:get_purge_seq(Db),
{ok, IdxPurgeSeq} = clouseau_rpc:get_purge_seq(IndexPid),
DbPurgeSeq - IdxPurgeSeq.
update_or_delete_index(IndexPid, Db, DI, Proc) ->
#doc_info{id=Id, revs=[#rev_info{deleted=Del}|_]} = DI,
case Del of
true ->
ok = clouseau_rpc:delete(IndexPid, Id);
false ->
case maybe_skip_doc(Db, Id) of
true ->
ok;
false ->
{ok, Doc} = couch_db:open_doc(Db, DI, []),
Json = couch_doc:to_json_obj(Doc, []),
[Fields|_] = proc_prompt(Proc, [<<"index_doc">>, Json]),
Fields1 = [list_to_tuple(Field) || Field <- Fields],
Fields2 = maybe_add_partition(Db, Id, Fields1),
case Fields2 of
[] -> ok = clouseau_rpc:delete(IndexPid, Id);
_ -> ok = clouseau_rpc:update(IndexPid, Id, Fields2)
end
end
end.
update_local_doc(Db, Index, PurgeSeq) ->
DocId = dreyfus_util:get_local_purge_doc_id(Index#index.sig),
DocContent = dreyfus_util:get_local_purge_doc_body(Db, DocId, PurgeSeq, Index),
couch_db:update_doc(Db, DocContent, []).
update_task(NumChanges) ->
[Changes, Total] = couch_task_status:get([changes_done, total_changes]),
Changes2 = Changes + NumChanges,
Progress = case Total of
0 ->
0;
_ ->
(Changes2 * 100) div Total
end,
couch_task_status:update([{progress, Progress}, {changes_done, Changes2}]).
maybe_skip_doc(Db, <<"_design/", _/binary>>) ->
couch_db:is_partitioned(Db);
maybe_skip_doc(_Db, _Id) ->
false.
maybe_add_partition(_Db, _Id, []) ->
[];
maybe_add_partition(Db, Id, Fields) ->
case couch_db:is_partitioned(Db) of
true ->
Partition = couch_partition:from_docid(Id),
[{<<"_partition">>, Partition, {[]}} | Fields];
false ->
Fields
end.
|
