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|
-module(fabric).
-include_lib("mem3/include/mem3.hrl").
-include_lib("couch/include/couch_db.hrl").
% DBs
-export([all_dbs/0, all_dbs/1, create_db/1, create_db/2, delete_db/1,
delete_db/2, get_db_info/1, get_doc_count/1]).
% Documents
-export([open_doc/3, open_revs/4, get_missing_revs/2, update_doc/3,
update_docs/3, att_receiver/2]).
% Views
-export([all_docs/4, changes/4, query_view/3, query_view/4, query_view/6,
get_view_group_info/2]).
% miscellany
-export([design_docs/1, reset_validation_funs/1]).
-include("fabric.hrl").
% db operations
all_dbs() ->
all_dbs(<<>>).
all_dbs(Prefix) when is_list(Prefix) ->
all_dbs(list_to_binary(Prefix));
all_dbs(Prefix) when is_binary(Prefix) ->
Length = byte_size(Prefix),
MatchingDbs = ets:foldl(fun(#shard{dbname=DbName}, Acc) ->
case DbName of
<<Prefix:Length/binary, _/binary>> ->
[DbName | Acc];
_ ->
Acc
end
end, [], partitions),
{ok, lists:usort(MatchingDbs)}.
get_db_info(DbName) ->
fabric_db_info:go(dbname(DbName)).
get_doc_count(DbName) ->
fabric_db_doc_count:go(dbname(DbName)).
create_db(DbName) ->
create_db(DbName, []).
create_db(DbName, Options) ->
fabric_db_create:go(dbname(DbName), opts(Options)).
delete_db(DbName) ->
delete_db(DbName, []).
delete_db(DbName, Options) ->
fabric_db_delete:go(dbname(DbName), opts(Options)).
% doc operations
open_doc(DbName, Id, Options) ->
fabric_doc_open:go(dbname(DbName), docid(Id), opts(Options)).
open_revs(DbName, Id, Revs, Options) ->
fabric_doc_open_revs:go(dbname(DbName), docid(Id), Revs, opts(Options)).
get_missing_revs(DbName, IdsRevs) when is_list(IdsRevs) ->
Sanitized = [idrevs(IdR) || IdR <- IdsRevs],
fabric_doc_missing_revs:go(dbname(DbName), Sanitized).
update_doc(DbName, Doc, Options) ->
{ok, [Result]} = update_docs(DbName, [Doc], opts(Options)),
case Result of
{ok, _} ->
Result;
Error ->
throw(Error)
end.
update_docs(DbName, Docs, Options) ->
fabric_doc_update:go(dbname(DbName), docs(Docs), opts(Options)).
att_receiver(Req, Length) ->
fabric_doc_attachments:receiver(Req, Length).
all_docs(DbName, Callback, Acc0, #view_query_args{} = QueryArgs) when
is_function(Callback, 2) ->
fabric_view_all_docs:go(dbname(DbName), QueryArgs, Callback, Acc0).
changes(DbName, Callback, Acc0, Options) ->
% TODO use a keylist for Options instead of #changes_args, BugzID 10281
Feed = Options#changes_args.feed,
fabric_view_changes:go(dbname(DbName), Feed, Options, Callback, Acc0).
query_view(DbName, DesignName, ViewName) ->
query_view(DbName, DesignName, ViewName, #view_query_args{}).
query_view(DbName, DesignName, ViewName, QueryArgs) ->
Callback = fun default_callback/2,
query_view(DbName, DesignName, ViewName, Callback, [], QueryArgs).
query_view(DbName, Design, ViewName, Callback, Acc0, QueryArgs) ->
Db = dbname(DbName), View = name(ViewName),
case is_reduce_view(Db, Design, View, QueryArgs) of
true ->
Mod = fabric_view_reduce;
false ->
Mod = fabric_view_map
end,
Mod:go(Db, Design, View, QueryArgs, Callback, Acc0).
get_view_group_info(DbName, DesignId) ->
fabric_group_info:go(dbname(DbName), design_doc(DesignId)).
design_docs(DbName) ->
QueryArgs = #view_query_args{start_key = <<"_design/">>, include_docs=true},
Callback = fun({total_and_offset, _, _}, []) ->
{ok, []};
({row, {Props}}, Acc) ->
case couch_util:get_value(id, Props) of
<<"_design/", _/binary>> ->
{ok, [couch_util:get_value(doc, Props) | Acc]};
_ ->
{stop, Acc}
end;
(complete, Acc) ->
{ok, lists:reverse(Acc)}
end,
fabric:all_docs(dbname(DbName), Callback, [], QueryArgs).
reset_validation_funs(DbName) ->
[rexi:cast(Node, {fabric_rpc, reset_validation_funs, [Name]}) ||
#shard{node=Node, name=Name} <- mem3:shards(DbName)].
%% some simple type validation and transcoding
dbname(DbName) when is_list(DbName) ->
list_to_binary(DbName);
dbname(DbName) when is_binary(DbName) ->
DbName;
dbname(#db{name=Name}) ->
Name;
dbname(DbName) ->
erlang:error({illegal_database_name, DbName}).
name(Thing) ->
couch_util:to_binary(Thing).
docid(DocId) when is_list(DocId) ->
list_to_binary(DocId);
docid(DocId) when is_binary(DocId) ->
DocId;
docid(DocId) ->
erlang:error({illegal_docid, DocId}).
docs(Docs) when is_list(Docs) ->
[doc(D) || D <- Docs];
docs(Docs) ->
erlang:error({illegal_docs_list, Docs}).
doc(#doc{} = Doc) ->
Doc;
doc({_} = Doc) ->
couch_doc:from_json_obj(Doc);
doc(Doc) ->
erlang:error({illegal_doc_format, Doc}).
design_doc(#doc{} = DDoc) ->
DDoc;
design_doc(DocId) when is_list(DocId) ->
design_doc(list_to_binary(DocId));
design_doc(<<"_design/", _/binary>> = DocId) ->
DocId;
design_doc(GroupName) ->
<<"_design/", GroupName/binary>>.
idrevs({Id, Revs}) when is_list(Revs) ->
{docid(Id), [rev(R) || R <- Revs]}.
rev(Rev) when is_list(Rev); is_binary(Rev) ->
couch_doc:parse_rev(Rev);
rev({Seq, Hash} = Rev) when is_integer(Seq), is_binary(Hash) ->
Rev.
opts(Options) ->
case couch_util:get_value(user_ctx, Options) of
undefined ->
case erlang:get(user_ctx) of
#user_ctx{} = Ctx ->
[{user_ctx, Ctx} | Options];
_ ->
Options
end;
_ ->
Options
end.
default_callback(complete, Acc) ->
{ok, lists:reverse(Acc)};
default_callback(Row, Acc) ->
{ok, [Row | Acc]}.
is_reduce_view(_, _, _, #view_query_args{view_type=Reduce}) ->
Reduce =:= reduce.
|
