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%% This is a Dynomite plugin for calling the CouchDB raw Erlang API
%%
%% Most calls will have come from any of the web endpoints to execute
%% these functions on the proper node for the key(s).
-module(dynomite_couch_api).
-author('brad@cloudant.com').
-export([create_db/1, delete_db/1, get/1, put/1,
bulk_docs/1, missing_revs/1, get_db_info/1, get_view_group_info/1,
ensure_full_commit/1
]).
-include("../../couch/src/couch_db.hrl").
-include("../include/common.hrl").
%%--------------------------------------------------------------------
%% @spec create_db([Part, DbName, Options]) -> {ok,Db} | {error,Error}
%% Description: Creates the database shard.
%%--------------------------------------------------------------------
create_db([Part, DbName, Options]) ->
case couch_server:create(partitions:shard_name(Part, DbName), Options) of
{ok, Shard} ->
couch_db:close(Shard),
ok;
Error -> Error
end.
%%--------------------------------------------------------------------
%% @spec delete_db([Part, DbName, Options]) -> {ok,deleted} | {error,Error}
%% Description: Deletes the database shard.
%%--------------------------------------------------------------------
delete_db([Part, DbName, Options]) ->
couch_server:delete(partitions:shard_name(Part, DbName), Options).
get([Part, Db, DocId, Revs, Options]) ->
case showroom_db:open_shard(node(), Part, Db) of
{ok, Shard} ->
{Status, Doc} = couch_api:open_doc(Shard, DocId, Revs, Options),
showroom_db:close_shard(Shard),
{Status, {[], [Doc]}};
Error ->
Error
end.
put([Part, Db, Doc = #doc{clock=Clock}, Options]) ->
case showroom_db:open_shard(node(), Part, Db) of
{ok, Shard} ->
{Status, NewRev} = couch_db:update_doc(Shard, Doc, Options),
showroom_db:close_shard(Shard),
{Status, {Clock, [NewRev]}};
Error ->
Error
end.
bulk_docs([Part, SeqsDocs, Db, Options, Type]) ->
{Seqs, Docs} = lists:unzip(SeqsDocs),
case Docs of
[] -> {ok, []};
_ ->
case showroom_db:open_shard(node(), Part, Db) of
{ok, Shard} ->
{ok, Results1} = couch_db:update_docs(Shard, Docs, Options, Type),
showroom_db:close_shard(Shard),
Results = int_zip(Seqs, Results1),
{ok, Results};
Error ->
Error
end
end.
missing_revs([Part, SeqsIdsRevs, Db]) ->
{_Seqs, IdsRevs} = lists:unzip(SeqsIdsRevs),
case IdsRevs of
[] -> {ok, []};
_ ->
case showroom_db:open_shard(node(), Part, Db) of
{ok, Shard} ->
{ok, Results1} = couch_db:get_missing_revs(Shard, IdsRevs),
showroom_db:close_shard(Shard),
{ok, Results1};
Error ->
Error
end
end.
get_db_info([Part, Db]) ->
case showroom_db:open_shard(node(), Part, Db) of
{ok, Shard} ->
{Status, Info} = couch_db:get_db_info(Shard),
showroom_db:close_shard(Shard),
{Status, {[], Info}};
Error ->
Error
end.
get_view_group_info([Part, Db, DesignId]) ->
case showroom_db:open_shard(node(), Part, Db) of
{ok, Shard} ->
{ok, EmptyGroup} = showroom_view:build_skeleton_view_group(Db, DesignId),
<<"S", ShardName/binary>> = Shard#db.name,
{ok, Pid} = gen_server:call(couch_view, {get_group_server,
ShardName, EmptyGroup}),
{ok, Info} = couch_view_group:request_group_info(Pid),
showroom_db:close_shard(Shard),
{ok, {[], Info}};
Error ->
Error
end.
ensure_full_commit([Part, Db]) ->
case showroom_db:open_shard(node(), Part, Db) of
{ok, Shard} ->
{Status, Info} = couch_db:ensure_full_commit(Shard),
showroom_db:close_shard(Shard),
{Status, {[], Info}};
Error ->
Error
end.
%% =======================
%% internal
%% =======================
int_zip(Seqs, Docs) when length(Seqs) == length(Docs) ->
lists:zip(Seqs, Docs);
int_zip(_Seqs, []) ->
[];
int_zip(Seqs, Docs) ->
?debugFmt("~nWTF? int_zip~nSeqs: ~p~nDocs: ~p~n", [Seqs, Docs]),
[].
|
