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Transactions on mysql adapter #41

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merged 1 commit into from Oct 15, 2012
Merged

Transactions on mysql adapter #41

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39 changes: 38 additions & 1 deletion src/db_adapters/boss_db_adapter_mysql.erl
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Expand Up @@ -49,6 +49,7 @@ find(Pid, Type, Conditions, Max, Skip, Sort, SortOrder) when is_atom(Type), is_l
true ->
Query = build_select_query(Type, Conditions, Max, Skip, Sort, SortOrder),
Res = fetch(Pid, Query),

case Res of
{data, MysqlRes} ->
Columns = mysql:get_result_field_info(MysqlRes),
Expand Down Expand Up @@ -166,7 +167,43 @@ execute(Pid, Commands) ->
fetch(Pid, Commands).

transaction(Pid, TransactionFun) when is_function(TransactionFun) ->
mysql_conn:transaction(Pid, TransactionFun, self()).
do_transaction(Pid, TransactionFun).

do_transaction(Pid, TransactionFun) when is_function(TransactionFun) ->
case do_begin(Pid, self()) of
{error, _} = Err ->
{aborted, Err};
{updated,{mysql_result,[],[],0,0,[]}} ->
case catch TransactionFun() of
error = Err ->
do_rollback(Pid, self()),
{aborted, Err};
{error, _} = Err ->
do_rollback(Pid, self()),
{aborted, Err};
{'EXIT', _} = Err ->
do_rollback(Pid, self()),
{aborted, Err};
Res ->
case do_commit(Pid, self()) of
{error, _} = Err ->
do_rollback(Pid, self()),
{aborted, Err};
_ ->
{atomic, Res}
end
end
end.

do_begin(Pid,_)->
fetch(Pid, ["BEGIN"]).

do_commit(Pid,_)->
fetch(Pid, ["COMMIT"]).

do_rollback(Pid,_)->
fetch(Pid, ["ROLLBACK"]).


% internal

Expand Down