From 82081d45fd64294f4bc417085e06284f3487b32f Mon Sep 17 00:00:00 2001 From: nsensfel Date: Wed, 6 Jun 2018 16:42:42 +0200 Subject: ... --- src/db/logic/db_access.erl | 54 +++++++++++++++++++++++++++++++++++++++++ src/db/logic/storage_access.erl | 54 ----------------------------------------- 2 files changed, 54 insertions(+), 54 deletions(-) create mode 100644 src/db/logic/db_access.erl delete mode 100644 src/db/logic/storage_access.erl (limited to 'src/db/logic') diff --git a/src/db/logic/db_access.erl b/src/db/logic/db_access.erl new file mode 100644 index 0000000..f589ba8 --- /dev/null +++ b/src/db/logic/db_access.erl @@ -0,0 +1,54 @@ +-module(db_access). + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +-export +( + [ + read/2, + insert/4, + query/1 + ] +). +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +get_value ([]) -> not_found; +get_value ([Regval]) -> {ok, sh_db_item:get_value(Regval)}. + +read_transaction (DB, ID) -> + get_value(mnesia:read(DB, ID)). + +insert_transaction (DB, ID, Perm, Value) -> + StoredItem = sh_db_item:new(ID, Perm, Value), + % FIXME: handle return value, mnesia:write -> (transaction abort | ok). + % FIXME: is this an atomic OP? Is the lock freed afterwards? + mnesia:write(DB, StoredItem, sticky_write), + ok. + +query_transaction (Query) -> + DB = sh_db_query:get_database(Query), + ID = sh_db_query:get_entry_id(Query), + [Item] = mnesia:read(DB, ID), + {ok, UpdatedItem} = sh_db_query:apply_to(Query, Item), + % FIXME: handle return value, mnesia:write -> (transaction abort | ok). + % FIXME: is this an atomic OP? Is the lock freed afterwards? + mnesia:write(DB, UpdatedItem, sticky_write), + ok. + +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% +read (DB, ID) -> + mnesia:transaction(fun read_transaction/2, [DB, ID]). + +insert (DB, ID, Perm, Value) -> + mnesia:transaction(fun insert_transaction/4, [DB, ID, Perm, Value]). + +query (Query) -> + mnesia:transaction(fun query_transaction/1, [Query]). diff --git a/src/db/logic/storage_access.erl b/src/db/logic/storage_access.erl deleted file mode 100644 index 437294f..0000000 --- a/src/db/logic/storage_access.erl +++ /dev/null @@ -1,54 +0,0 @@ --module(storage_access). - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% TYPES %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% EXPORTS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% --export -( - [ - read/2, - insert/4, - query/1 - ] -). -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% LOCAL FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -get_value ([]) -> not_found; -get_value ([Regval]) -> {ok, db_item:get_value(Regval)}. - -read_transaction (DB, ID) -> - get_value(mnesia:read(DB, ID)). - -insert_transaction (DB, ID, Perm, Value) -> - StoredItem = db_item:new(ID, Perm, Value), - % FIXME: handle return value, mnesia:write -> (transaction abort | ok). - % FIXME: is this an atomic OP? Is the lock freed afterwards? - mnesia:write(DB, StoredItem, sticky_write), - ok. - -query_transaction (Query) -> - DB = db_query:get_database(Query), - ID = db_query:get_entry_id(Query), - [Item] = mnesia:read(DB, ID), - {ok, UpdatedItem} = db_query:apply_to(Query, Item), - % FIXME: handle return value, mnesia:write -> (transaction abort | ok). - % FIXME: is this an atomic OP? Is the lock freed afterwards? - mnesia:write(DB, UpdatedItem, sticky_write), - ok. - -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%% EXPORTED FUNCTIONS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% -read (DB, ID) -> - mnesia:transaction(fun read_transaction/2, [DB, ID]). - -insert (DB, ID, Perm, Value) -> - mnesia:transaction(fun insert_transaction/4, [DB, ID, Perm, Value]). - -query (Query) -> - mnesia:transaction(fun query_transaction/1, [Query]). -- cgit v1.2.3-70-g09d2