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|
-module(shr_database).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-export
(
[
insert_at/5,
insert/4,
remove/3,
fetch/3,
reserve/3,
commit/1
]
).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec get_debug_db_node () -> node().
get_debug_db_node () -> list_to_atom("db_node@" ++ net_adm:localhost()).
-spec get_random_db_node () -> node().
get_random_db_node () ->
get_debug_db_node().
-spec get_db_node_for (binary()) -> node().
get_db_node_for (_ObjectID) ->
get_debug_db_node().
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-spec insert_at
(
atom(),
binary(),
shr_db_user:permission(),
shr_db_user:permission(),
any()
)
-> 'ok'.
insert_at (DB, ObjectID, ReadPerm, WritePerm, Value) ->
DBNode = get_db_node_for(ObjectID),
{atomic, _} =
rpc:call
(
DBNode,
db_access,
insert_at,
[DB, ObjectID, ReadPerm, WritePerm, Value]
),
io:format
(
"~nshr_database:insert_at(~p) ! ~p -> ok.~n",
[{DB, ObjectID, ReadPerm, WritePerm, Value}, DBNode]
),
ok.
-spec insert
(
atom(),
shr_db_user:permission(),
shr_db_user:permission(),
any()
)
-> {'ok', binary()}.
insert (DB, ReadPerm, WritePerm, Value) ->
DBNode = get_random_db_node(),
{atomic, {ok, ID}} =
rpc:call(DBNode, db_access, insert, [DB, ReadPerm, WritePerm, Value]),
io:format
(
"~nshr_database:insert(~p) ! ~p -> ok.~n",
[{DB, ReadPerm, WritePerm, Value}, DBNode]
),
{ok, ID}.
-spec fetch
(
atom(),
binary(),
shr_db_user:user()
)
-> ({'ok', any()} | 'not_found').
fetch (DB, ObjectID, Cred) ->
DBNode = get_db_node_for(ObjectID),
{atomic, Reply} = rpc:call(DBNode, db_access, read, [DB, ObjectID, Cred]),
io:format
(
"~nshr_database:fetch(~p) ! ~p -> ~p.~n",
[{DB, ObjectID, Cred}, DBNode, Reply]
),
Reply.
-spec commit (shr_db_query:type()) -> 'ok'.
commit (Query) ->
DBNode = get_db_node_for(shr_db_query:get_entry_id(Query)),
{atomic, ok} = rpc:call(DBNode, db_access, query, [Query]),
io:format("~nshr_database:commit(~p) ! ~p -> ok.~n", [Query, DBNode]),
ok.
-spec remove
(
atom(),
binary(),
shr_db_user:user()
)
-> ('ok' | 'not_found').
remove (DB, ObjectID, Cred) ->
DBNode = get_db_node_for(ObjectID),
{atomic, _} = rpc:call(DBNode, db_access, remove, [DB, ObjectID, Cred]),
io:format
(
"~nshr_database:remove(~p) ! ~p -> ok.~n",
[{DB, ObjectID, Cred}, DBNode]
),
ok.
-spec reserve
(
atom(),
binary(),
shr_db_user:user()
)
-> ('ok' | 'not_found').
reserve (DB, ObjectID, Cred) ->
DBNode = get_db_node_for(ObjectID),
{atomic, _} = rpc:call(DBNode, db_access, reserve, [DB, ObjectID, Cred]),
io:format
(
"~nshr_database:reserve(~p) ! ~p -> ok.~n",
[{DB, ObjectID, Cred}, DBNode]
),
ok.
|
