private IEventStream PrepareStream(IAggregate aggregate, Dictionary <string, object> headers)
{
IEventStream stream;
if (!this.streams.TryGetValue(aggregate.Id, out stream))
{
this.streams[aggregate.Id] = stream = this.eventStore.CreateStream(aggregate.Id);
}
foreach (var item in headers)
{
stream.UncommittedHeaders[item.Key] = item.Value;
}
aggregate.GetUncommittedEvents()
.Cast <object>()
.Select(x => new EventMessage {
Body = x
})
.ToList()
.ForEach(stream.Add);
aggregate.ClearUncommittedEvents();
return(stream);
}
public void Save(IAggregate aggregate)
{
var commitId = Guid.NewGuid();
var events = aggregate.GetUncommittedEvents().ToArray();
if (events.Any() == false)
{
return;
}
var streamName = GetStreamName(aggregate.GetType(), aggregate.Id);
var originalVersion = aggregate.Version - events.Count();
var expectedVersion = originalVersion == 0 ? ExpectedVersion.NoStream : originalVersion - 1;
var commitHeaders = new Dictionary <string, object>
{
{ "CommitId", commitId },
{ "AggregateClrType", aggregate.GetType().AssemblyQualifiedName }
};
var eventsToSave = events.Select(e => e.ToEventData(commitHeaders)).ToList();
_connection.AppendToStreamAsync(streamName, expectedVersion, eventsToSave).Wait();
aggregate.ClearUncommittedEvents();
foreach (var evento in events)
{
if (evento.GetType().ToString().Equals("CantidadIncrementada"))
{
new HandlerCantidadIncrementada().Hanlder((CantidadIncrementada)evento);
}
else if (evento.GetType().ToString().Equals("CantidadDecrementada"))
{
new HandlerCantidadDecrementada().Hanlder((CantidadDecrementada)evento);
}
}
}
public void Save(string bucketId, IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
Dictionary <string, object> headers = PrepareHeaders(aggregate, updateHeaders);
while (true)
{
IEventStream stream = PrepareStream(bucketId, aggregate, headers);
int commitEventCount = stream.CommittedEvents.Count;
try {
stream.CommitChanges(commitId);
aggregate.ClearUncommittedEvents();
return;
}
catch (DuplicateCommitException) {
stream.ClearChanges();
return;
}
catch (ConcurrencyException e) {
var conflict = ThrowOnConflict(stream, commitEventCount);
stream.ClearChanges();
if (conflict)
{
throw new ConflictingCommandException(e.Message, e);
}
}
catch (StorageException e) {
throw new PersistenceException(e.Message, e);
}
}
}
public void Store(IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var commit = new Commit
{
CommitId = commitId,
AggregateId = aggregate.Id,
CommitStamp = DateTimeOffset.UtcNow
};
using (var session = string.IsNullOrWhiteSpace(_databaseName)
? _store.OpenSession()
: _store.OpenSession(_databaseName))
{
session.Advanced.UseOptimisticConcurrency = true;
session.Advanced.AllowNonAuthoritativeInformation = false;
var stream = session.Load <EventStream>(aggregate.Id.ToStringId <EventStream>());
if (stream == null)
{
stream = new EventStream
{
Id = aggregate.Id.ToStringId <EventStream>(),
AggregateType = aggregate.GetType().FullName
};
session.Store(stream);
}
commit.CommitSequence = stream.Commits.Count + 1;
commit.Events = aggregate.GetUncommittedEvents()
.Cast <object>()
.Select(x => new Event {
Body = x, Headers = PrepareHeaders(updateHeaders)
})
.ToList();
stream.Version = aggregate.Version;
stream.Snapshot = aggregate;
stream.Commits.Add(commitId, commit);
//pre-commit hooks
if (_pipelineHooks.All(hook => hook.PreCommit(commit)))
{
try
{
session.SaveChanges();
aggregate.ClearUncommittedEvents();
}
catch (Exception exception)
{
throw;
}
}
}
//post commit hooks
foreach (var hook in _pipelineHooks)
{
hook.PostCommit(commit, _databaseName);
}
}
public async Task SaveAsync(IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var commitHeaders = new Dictionary <string, object>
{
{ CommitIdHeader, commitId },
{ this._aggregateClrTypeHeader, aggregate.GetType().AssemblyQualifiedName }
};
updateHeaders(commitHeaders);
var streamName = this._aggregateIdToStreamName(aggregate.GetType(), aggregate.Id);
var newEvents = aggregate.GetUncommittedEvents().Cast <object>().ToList();
var originalVersion = aggregate.Version - newEvents.Count;
var expectedVersion = originalVersion == 0 ? ExpectedVersion.NoStream : originalVersion - 1;
var eventsToSave = newEvents.Select(e => ToEventData(Guid.NewGuid(), e, commitHeaders)).ToList();
if (eventsToSave.Count < WritePageSize)
{
await this._eventDataFactory.AppendToStreamAsync(aggregate, expectedVersion, eventsToSave);
}
else
{
//TODO
}
aggregate.ClearUncommittedEvents();
}
public virtual void Save(IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var headers = PrepareHeaders(aggregate, updateHeaders);
while (true)
{
var stream = this.PrepareStream(aggregate, headers);
var commitEventCount = stream.CommittedEvents.Count;
try
{
stream.CommitChanges(commitId);
aggregate.ClearUncommittedEvents();
return;
}
catch (DuplicateCommitException)
{
stream.ClearChanges();
return;
}
catch (ConcurrencyException e)
{
if (this.ThrowOnConflict(stream, commitEventCount))
{
throw new ConflictingCommandException(e.Message, e);
}
stream.ClearChanges();
}
catch (StorageException e)
{
throw new PersistenceException(e.Message, e);
}
}
}
public OrderedEventPayload[] Save(IAggregate aggregate)
{
var events = aggregate.GetUncommittedEvents().ToArray();
if (events.Any() == false)
{
return new OrderedEventPayload[] { }
}
; // Nothing to save
var aggregateType = aggregate.GetType().Name;
var originalVersion = aggregate.Version - events.Count() + 1;
var eventsToSave = events
.Select(e => e.ToEventData(aggregateType, aggregate.Id, originalVersion++))
.ToArray();
var storedAggregateVersion = _eventRepository.GetVersionByAggregateId(aggregate.Id);
if (storedAggregateVersion.HasValue && storedAggregateVersion >= originalVersion)
{
throw new Exception("Concurrency exception");
}
var orderedEvents = _eventRepository.SaveEvents(eventsToSave);
aggregate.ClearUncommittedEvents();
return(orderedEvents);
}
private async Task SaveAsync(IAggregate aggregate)
{
var events = aggregate.GetUncomittedEvents();
foreach (var @event in events)
{
@event.SetAggregateId(aggregate.Id);
}
await domainObjectRepository.SaveAsync(aggregate, events, Guid.NewGuid());
aggregate.ClearUncommittedEvents();
}
public async void Save(IAggregate aggregate, Guid commitId, IDictionary <string, object> updateHeaders = null)
{
// standard data for metadata portion of persisted event
var commitHeaders = new Dictionary <string, object>
{
// handy tracking id
{ CommitIdHeader, commitId },
// type of aggregate being persisted
{ AggregateClrTypeHeader, aggregate.GetType().AssemblyQualifiedName }
};
// add extra data to metadata portion of presisted event
commitHeaders = (updateHeaders ?? new Dictionary <string, object>())
.Concat(commitHeaders)
.GroupBy(d => d.Key)
.ToDictionary(d => d.Key, d => d.First().Value);
// streamname is created by func, by default agg type concat to agg id
var streamName = _aggregateIdToStreamName(aggregate.GetType(), aggregate.Id);
// get all uncommitted events
var newEvents = aggregate.GetUncommittedEvents().Cast <object>().ToList();
// process events so they fit the expectations of GES
var eventsToSave = newEvents.Select(e => ToEventData(Guid.NewGuid(), e, commitHeaders)).ToList();
// calculate the expected version of the agg root in event store to detirmine if concurrency conflict
var originalVersion = aggregate.Version - newEvents.Count;
var expectedVersion = originalVersion == 0 ? ExpectedVersion.NoStream : originalVersion - 1;
// if numberr of events to save is small enough it can happen in one call
if (eventsToSave.Count < WritePageSize)
{
await _eventStoreConnection.AppendToStreamAsync(streamName, expectedVersion, eventsToSave);
}
// otherwise batch events and start transaction
else
{
var transaction = await _eventStoreConnection.StartTransactionAsync(streamName, expectedVersion);
var position = 0;
while (position < eventsToSave.Count)
{
var pageEvents = eventsToSave.Skip(position).Take(WritePageSize);
await transaction.WriteAsync(pageEvents);
position += WritePageSize;
}
await transaction.CommitAsync();
}
aggregate.ClearUncommittedEvents();
}
public void Save(IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var commitHeaders = new Dictionary <string, object>
{
{ COMMIT_ID_HEADER, commitId },
{ AGGREGATE_CLR_TYPE_HEADER, aggregate.GetType().AssemblyQualifiedName }
};
updateHeaders(commitHeaders);
var streamName = m_AggregateIdToStreamName(aggregate.GetType(), aggregate.Id);
var newEvents = aggregate.GetUncommittedEvents().Cast <object>().ToList();
var originalVersion = aggregate.Version - newEvents.Count;
var expectedVersion = originalVersion == 0 ? ExpectedVersion.NoStream : originalVersion;
var eventsToSave = newEvents.Select(e => ToEventData(Guid.NewGuid(), e, commitHeaders)).ToList();
var transaction = m_EventStoreConnection.StartTransaction(streamName, expectedVersion);
try
{
if (eventsToSave.Count < WRITE_PAGE_SIZE)
{
transaction.Write(eventsToSave);
}
else
{
var position = 0;
while (position < eventsToSave.Count)
{
var pageEvents = eventsToSave.Skip(position).Take(WRITE_PAGE_SIZE);
transaction.Write(pageEvents);
position += WRITE_PAGE_SIZE;
}
}
//TODO: not prod code. Need to arrange serialization, data saved to ES should be same as sent to queue
foreach (var @event in newEvents)
{
m_EventsPublisher.PublishEvent(@event);
}
transaction.Commit();
}
catch (Exception e)
{
Console.WriteLine(e);
//TODO:logging
transaction.Rollback();
}
aggregate.ClearUncommittedEvents();
}
public void Save(IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var commitHeaders = new Dictionary <string, object>
{
{ CommitIdHeader, commitId },
{ AggregateClrTypeHeader, aggregate.GetType().AssemblyQualifiedName }
};
updateHeaders(commitHeaders);
var streamName = _aggregateIdToStreamName(aggregate.GetType(), aggregate.Id);
var newEvents = aggregate.GetUncommittedEvents().Cast <object>().ToList();
var originalVersion = aggregate.Version - newEvents.Count;
var expectedVersion = originalVersion == 0 ? ExpectedVersion.NoStream : originalVersion - 1;
var eventsToSave = newEvents.Select(e => ToEventData(Guid.NewGuid(), e, commitHeaders)).ToList();
if (eventsToSave.Count < WritePageSize)
{
_eventStoreConnection.AppendToStreamAsync(streamName, expectedVersion, eventsToSave).Wait();
}
else
{
var transaction = _eventStoreConnection.StartTransactionAsync(streamName, expectedVersion).Result;
var position = 0;
while (position < eventsToSave.Count)
{
var pageEvents = eventsToSave.Skip(position).Take(WritePageSize);
transaction.WriteAsync(pageEvents).Wait();
position += WritePageSize;
}
transaction.CommitAsync().Wait();
}
if (_outBus != null)
{
foreach (var evt in newEvents)
{
try
{
_outBus.Publish((Message)evt);
}
catch { }//TODO: see if we need to do something here
}
}
aggregate.ClearUncommittedEvents();
}
public void Write(IAggregate aggregate, Guid commitId, Action<IDictionary<string, object>> updateHeaders)
{
var streamName = _aggregateIdToStreamName(aggregate.Category, aggregate.Id);
var newEvents = aggregate.GetUncommittedEvents().Cast<object>().ToList();
var eventsToSave = newEvents
.Select(e => e.AsJsonEvent())
.ToList();
foreach (var eventData in eventsToSave)
{
var data = new StreamData(streamName, eventData);
FakeDatabase.Events.Add(Guid.NewGuid(), data);
}
aggregate.ClearUncommittedEvents();
}
public void Save(IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var commitHeaders = new Dictionary <string, object>
{
{ CommitIdHeader, commitId },
{ AggregateClrTypeHeader, aggregate.GetType().AssemblyQualifiedName }
};
updateHeaders(commitHeaders);
var streamName = _aggregateIdToStreamName(aggregate.GetType(), aggregate.Id);
var newEvents = aggregate.GetUncommittedEvents().Cast <object>().ToList();
var originalVersion = aggregate.Version - newEvents.Count;
var expectedVersion = originalVersion == 0 ? ExpectedVersion.NoStream : originalVersion - 1;
var eventsToSave = newEvents.Select(e => ToEventData(Guid.NewGuid(), e, commitHeaders)).ToList();
if (eventsToSave.Count < WritePageSize)
{
_eventStoreConnection.AppendToStream(streamName, expectedVersion, eventsToSave);
}
else
{
var transaction = _eventStoreConnection.StartTransaction(streamName, expectedVersion);
var position = 0;
while (position < eventsToSave.Count)
{
var pageEvents = eventsToSave.Skip(position).Take(WritePageSize);
transaction.Write(pageEvents);
position += WritePageSize;
}
transaction.Commit();
}
foreach (var newEvent in newEvents)
{
_bus.Publish(newEvent);
}
aggregate.ClearUncommittedEvents();
}
public void Should_add_event_to_uncommitted_events_and_increase_version_when_raised()
{
var event1 = new MyEvent();
var event2 = new MyEvent();
var sut = new DO(Guid.NewGuid(), 10);
IAggregate aggregate = sut;
sut.RaiseTestEvent(event1);
sut.RaiseTestEvent(event2);
Assert.Equal(12, sut.Version);
Assert.Equal(new IEvent[] { event1, event2 }, aggregate.GetUncomittedEvents().Select(x => x.Payload).ToArray());
aggregate.ClearUncommittedEvents();
Assert.Equal(0, sut.GetUncomittedEvents().Count);
}
public void Save(IAggregate aggregate)
{
var commitId = Guid.NewGuid();
var events = aggregate.GetUncommittedEvents().ToArray();
if (events.Any() == false)
{
return;
}
var streamName = GetTheStreamName(aggregate.GetType(), aggregate.Id);
var originalVersion = aggregate.Version - events.Count();
var expectedVersion = originalVersion == 0 ? ExpectedVersion.NoStream : originalVersion - 1;
var commitHeaders = new Dictionary <string, object>
{
{ "CommitId", commitId },
{ "AggregateClrType", aggregate.GetType().AssemblyQualifiedName }
};
var eventsToSave = events.Select(e => e.ToEventData(commitHeaders)).ToList();
connection.AppendToStreamAsync(streamName, expectedVersion, eventsToSave).Wait();
aggregate.ClearUncommittedEvents();
}
public async Task Save(IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var commitHeaders = new Dictionary <string, object>
{
{ CommitIdHeader, commitId },
{ CommitDateHeader, DateTime.UtcNow },
{ AggregateClrTypeHeader, aggregate.GetType().AssemblyQualifiedName }
};
updateHeaders(commitHeaders);
var streamName = aggregateIdToStreamName(aggregate.GetType(), aggregate.Id.Value);
var newEvents = aggregate.GetUncommittedEvents().Cast <object>().ToList();
var originalVersion = aggregate.Version - newEvents.Count;
var expectedVersion = originalVersion == 0 ? ExpectedVersion.NoStream : originalVersion - 1;
var eventsToSave = newEvents.Select(e => ToEventData(Guid.NewGuid(), e, commitHeaders)).ToList();
if (eventsToSave.Count < WritePageSize)
{
eventStoreConnection.AppendToStreamAsync(streamName, expectedVersion, eventsToSave).Wait();
}
else
{
var transaction = eventStoreConnection.StartTransactionAsync(streamName, expectedVersion).Result;
var position = 0;
while (position < eventsToSave.Count)
{
var pageEvents = eventsToSave.Skip(position).Take(WritePageSize);
await transaction.WriteAsync(pageEvents);
position += WritePageSize;
}
await transaction.CommitAsync();
transaction.Dispose();
}
aggregate.ClearUncommittedEvents();
}
public async Task <AggregateCommit> SaveAsync(IAggregate aggregate)
{
if (aggregate.Id == Guid.Empty)
{
throw new Exception(
$"The aggregate {aggregate.GetType().FullName} has tried to be saved with an empty id");
}
var uncommittedEvents = aggregate.GetUncommittedEvents().Cast <IEventData>().ToArray();
var count = 0;
var metadata = string.Empty;
try
{
var col = _db.GetCollection <LocalEventTable>();
col.EnsureIndex(x => x.StreamId, false);
col.InsertBulk(uncommittedEvents.Select(x => new LocalEventTable {
StreamId = aggregate.Id,
Version = x.Version,
TransactionId = _commandContext.Transaction.Id,
AppVersion = _commandContext.AppVersion,
When = x.TimeStamp,
Body = JsonConvert.SerializeObject(x.Event, SerializerSettings),
Category = aggregate.GetType().FullName,
Who = _commandContext.ImpersonatorBy?.GuidId ?? _commandContext.By.GuidId,
BodyType = x.Type.FullName
}));
}
catch (Exception e)
{
throw new Exception(
$"The aggregate {aggregate.GetType().FullName} has tried to save events to an old version of an aggregate");
}
aggregate.ClearUncommittedEvents();
return(new AggregateCommit(aggregate.Id, _commandContext.By.GuidId, metadata, uncommittedEvents));
}
public void Save(string bucketId, IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
Dictionary <string, object> headers = PrepareHeaders(aggregate, updateHeaders);
while (true)
{
IEventStream stream = PrepareStream(bucketId, aggregate, headers);
int commitEventCount = stream.CommittedEvents.Count;
try
{
stream.CommitChanges(commitId);
aggregate.ClearUncommittedEvents();
return;
}
catch (DuplicateCommitException)
{
stream.ClearChanges();
// Issue: #4 and test: when_an_aggregate_is_persisted_using_the_same_commitId_twice
// should we rethtow the exception here? or provide a feedback whether the save was successful ?
return;
}
catch (ConcurrencyException e)
{
var conflict = ThrowOnConflict(stream, commitEventCount);
stream.ClearChanges();
if (conflict)
{
throw new ConflictingCommandException(e.Message, e);
}
}
catch (StorageException e)
{
throw new PersistenceException(e.Message, e);
}
}
}
private void ClearEvents(IAggregate agr)
{
agr.ClearUncommittedEvents();
}
/// <summary>
/// Stores the aggregate changes.
/// </summary>
/// <param name="aggregate"></param>
public void SaveChanges(IAggregate aggregate)
{
SaveEvents(new AggregateKey(aggregate), aggregate.Revision, aggregate.UncommittedChanges());
aggregate.ClearUncommittedEvents();
}
public void Save(IAggregate aggregate, Guid commitId, Action <IDictionary <string, object> > updateHeaders)
{
var commitHeaders = new Dictionary <string, object>
{
{ CommitIdHeader, commitId },
{ AggregateClrTypeHeader, aggregate.GetType().AssemblyQualifiedName }
};
updateHeaders(commitHeaders);
var streamName = _aggregateIdToStreamName(aggregate.GetType(), aggregate.Id);
var categoryStreamName = _aggregateTypeToCategoryStreamName(aggregate.GetType());
var newEvents = aggregate.GetUncommittedEvents().Cast <object>().ToList();
var originalVersion = aggregate.Version - newEvents.Count;
var expectedVersion = originalVersion == 0 ? ExpectedVersion.NoStream : originalVersion - 1;
var eventsToSave = newEvents.Select(e => ToEventData(Guid.NewGuid(), e, commitHeaders)).ToList();
List <EventData> stream;
_store.TryGetValue(streamName, out stream);
List <EventData> catStream;
_store.TryGetValue(categoryStreamName, out catStream);
if (stream == null)
{
if (expectedVersion == ExpectedVersion.Any || expectedVersion == ExpectedVersion.NoStream)
{
stream = new List <EventData>();
_store.Add(streamName, stream);
if (catStream == null)
{
catStream = new List <EventData>();
_store.Add(categoryStreamName, catStream);
}
}
else
{
throw new WrongExpectedVersionException("Stream " + streamName + " does not exist.");
}
}
if (stream.Count != 0 && stream.Count - 1 != expectedVersion) // a new stream will be @ version 0
{
throw new AggregateException(new WrongExpectedVersionException(
$"Stream {streamName} at version {stream.Count}, expected version {expectedVersion}"));
}
stream.AddRange(eventsToSave);
catStream?.AddRange(eventsToSave);
foreach (var evt in eventsToSave)
{
var etName = _eventNameToEventTypeStreamName(evt.Type);
List <EventData> etStream;
if (!_store.TryGetValue(etName, out etStream))
{
etStream = new List <EventData>();
_store.Add(etName, etStream);
}
etStream.Add(evt);
}
foreach (var @event in aggregate.GetUncommittedEvents().Cast <object>().Where(@event => (@event as Message) != null))
{
_bus.Publish(@event as Message);
_history.Add(new Tuple <string, Message>(streamName, @event as Message));
}
aggregate.ClearUncommittedEvents();
}
/// <summary>
/// Stores the aggregate changes.
/// </summary>
/// <param name="aggregate"></param>
public void SaveChanges(IAggregate aggregate)
{
SaveEvents(new AggregateKey(aggregate), aggregate.Revision, aggregate.UncommittedChanges());
aggregate.ClearUncommittedEvents();
}
public static void ClearEvents(this IAggregate aggregate)
{
aggregate.ClearUncommittedEvents();
}
private void Hydrate(IAggregate aggregate)
{
GetOrAddEventList(aggregate.Id).ForEach(aggregate.ApplyEvent);
aggregate.ClearUncommittedEvents();
}
