public void AddState(string dataProviderKey, JToken data, Guid transactionId)
{
var dataStr = JsonConvert.SerializeObject(data, Formatting.Indented, new JsonSerializerSettings
{
TypeNameHandling = TypeNameHandling.All
});
TransactionStateEntity n = new TransactionStateEntity()
{
Data = dataStr, Id = transactionId
};
var transactionalCasDataProvider = this.dataProviderPool.GetProvider(dataProviderKey);
using (new StopwatchLog(Metrics.CassAdd))
{
transactionalCasDataProvider.Mapper.InsertAsync(n, CqlQueryOptions.New());
}
}
public async Task <string> Store(string expectedETag, TransactionalStateMetaData metadata,
List <PendingTransactionState <TState> > statesToPrepare, long?commitUpTo,
long?abortAfter)
{
if (_metadata.ETag != expectedETag)
{
throw new ArgumentException(nameof(expectedETag), "Etag does not match");
}
var stateUpdater = new StateUpdater(_dbExecuter, _stateId, _options.StateTableName, _jsonSettings);
// first, clean up aborted records
if (abortAfter.HasValue && _states.Count != 0)
{
await stateUpdater.DeleteStates(afterSequenceId : abortAfter);
while (_states.Count > 0 && _states[_states.Count - 1].SequenceId > abortAfter)
{
_states.RemoveAt(_states.Count - 1);
}
}
// second, persist non-obsolete prepare records
var obsoleteBefore = commitUpTo.HasValue ? commitUpTo.Value : _metadata.CommittedSequenceId;
if (statesToPrepare != null && statesToPrepare.Count > 0)
{
foreach (var s in statesToPrepare)
{
if (s.SequenceId >= obsoleteBefore)
{
var newState = new TransactionStateEntity
{
SequenceId = s.SequenceId,
TransactionId = s.TransactionId,
Timestamp = s.TimeStamp,
TransactionManager = s.TransactionManager,
Value = s.State
};
if (FindState(s.SequenceId, out var pos))
{
// overwrite with new pending state
_states[pos] = newState;
await stateUpdater.UpdateState(newState).ConfigureAwait(false);
}
else
{
await stateUpdater.InsertState(newState).ConfigureAwait(false);
_states.Insert(pos, newState);
}
_logger.LogTrace($"{_stateId}.{newState.SequenceId} Update {newState.TransactionId}");
}
}
}
await stateUpdater.EnsureInsertBufferFlushed();
// third, persist metadata and commit position
_metadata = await PersistMetadata(metadata, commitUpTo ?? _metadata.CommittedSequenceId);
// fourth, remove obsolete records
if (_states.Count > 0 && _states[0].SequenceId < obsoleteBefore)
{
FindState(obsoleteBefore, out var pos);
await stateUpdater.DeleteStates(beforeSequenceId : obsoleteBefore);
_states.RemoveRange(0, pos);
}
return(_metadata.ETag);
}
