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|
-module(shr_database).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-export
(
[
insert/5,
fetch/3,
commit/1
]
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec get_db_node () -> node().
get_db_node () -> list_to_atom("db_node@" ++ net_adm:localhost()).
-spec do_remote_operation (atom(), list(any())) ->
(
{'badrpc', any()}
| {'aborted', any()}
| {'atomic', ({'ok', any()} | 'ok' | 'not_found')}
).
do_remote_operation (Op, Params) ->
rpc:call(get_db_node(), db_access, Op, Params).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec insert
(
atom(),
any(),
shr_db_user:permission(),
shr_db_user:permission(),
any()
)
-> 'ok'.
insert (DB, ObjectID, ReadPerm, WritePerm, Value) ->
{atomic, _} =
do_remote_operation(insert, [DB, ObjectID, ReadPerm, WritePerm, Value]),
io:format
(
"~nshr_database:insert(~p) -> ok.~n",
[{DB, ObjectID, ReadPerm, WritePerm, Value}]
),
ok.
-spec fetch
(
atom(),
any(),
shr_db_user:user()
)
-> ({'ok', any()} | 'not_found').
fetch (DB, ObjectID, Cred) ->
{atomic, Reply} = do_remote_operation(read, [DB, ObjectID, Cred]),
io:format
(
"~nshr_database:fetch(~p) -> ~p.~n",
[{DB, ObjectID, Cred}, Reply]
),
Reply.
-spec commit (shr_db_query:type()) -> 'ok'.
commit (Query) ->
{atomic, ok} = do_remote_operation(query, [Query]),
io:format("~nshr_database:commit(~p) -> ok.~n", [Query]),
ok.
|
