private void StartProcessingTransactions()
{
_shouldContinue = true;
_singleConsumer = new Thread(() =>
{
while (_shouldContinue)
{
try
{
// this call is blocking if nothing to process
var persistentTransaction = TransactionLog.StartProcessing();
if (persistentTransaction != null &&
persistentTransaction.TransactionStatus != TransactionStaus.Canceled)
{
var data = persistentTransaction.Data;
var transaction =
SerializationHelper.ObjectFromBytes <Transaction>(data,
SerializationMode.ProtocolBuffers,
false);
if (transaction is MixedTransaction mixedTransaction)
{
foreach (var item in mixedTransaction.ItemsToPut)
{
var itemData =
SerializationHelper.ObjectToBytes(item, SerializationMode.ProtocolBuffers,
null);
Dbg.Trace(
$"storing persistent block for object {item} transaction={persistentTransaction.Id}");
_storage.StoreBlock(itemData, item.GlobalKey,
unchecked ((int)persistentTransaction.Id));
}
foreach (var item in mixedTransaction.ItemsToDelete)
{
Dbg.Trace($"deleting persistent block {persistentTransaction.Id}");
_storage.DeleteBlock(item.GlobalKey, unchecked ((int)persistentTransaction.Id));
}
}
if (transaction is PutTransaction putTransaction)
{
foreach (var item in putTransaction.Items)
{
var itemData =
SerializationHelper.ObjectToBytes(item, SerializationMode.ProtocolBuffers,
null);
Dbg.Trace(
$"storing persistent block for object {item} transaction={persistentTransaction.Id}");
_storage.StoreBlock(itemData, item.GlobalKey,
unchecked ((int)persistentTransaction.Id));
}
}
if (transaction is DeleteTransaction deleteTransaction)
{
foreach (var item in deleteTransaction.ItemsToDelete)
{
Dbg.Trace($"deleting persistent block {persistentTransaction.Id}");
_storage.DeleteBlock(item.GlobalKey, unchecked ((int)persistentTransaction.Id));
}
}
TransactionLog.EndProcessing(persistentTransaction);
}
else
{
return;
}
}
catch (Exception e)
{
Dbg.Trace(e.Message);
//TODO add proper logging
}
}
});
_singleConsumer.Start();
}
