Commits FetchAllCommits()
{
var commits = new List <CommittedEventStream>();
var events = FetchAllEvents();
events.GroupBy(_ => _serializer.FromJsonBytes <EventMetadata>(_.Event.Metadata).Commit.Id).ForEach(commitGroup => {
CommitMetadata commitMetadata = null;
var commitEvents = new List <EventEnvelope>();
foreach (var @event in commitGroup)
{
var data = _serializer.PropertyBagFromJsonBytes(@event.Event.Data);
var eventMetadata = _serializer.FromJsonBytes <EventMetadata>(@event.Event.Metadata);
commitMetadata = eventMetadata.Commit;
commitEvents.Add(new EventEnvelope(eventMetadata.Event, data));
}
commits.Add(new CommittedEventStream(
commitMetadata.Sequence,
commitMetadata.Source,
commitMetadata.Id,
commitMetadata.CorrelationId,
commitMetadata.Timestamp,
new EventStream(commitEvents)
));
});
return(new Commits(commits));
}
/// <inheritdoc />
public CommittedEventStream Commit(UncommittedEventStream uncommittedEvents)
{
while (true)
{
var nextSequenceNumber = GetNextCommitSequenceNumber();
var lastEventSourceVersion = GetLastEventSourceVersion(uncommittedEvents.Source.Key);
if (uncommittedEvents.Source.Version.CompareTo(lastEventSourceVersion) <= 0)
{
throw new EventSourceConcurrencyConflict($"Current Version is {lastEventSourceVersion}, tried to commit {uncommittedEvents.Source.Version}");
}
var commitMetadata = new CommitMetadata(
nextSequenceNumber.Value,
uncommittedEvents.Source,
uncommittedEvents.Id,
DateTimeOffset.UtcNow,
uncommittedEvents.CorrelationId
);
_connection.AppendToStreamAsync(
GetStreamForCommit(),
nextSequenceNumber.Version,
CreateEventsFromUncomitted(uncommittedEvents, commitMetadata)
).Wait();
return(new CommittedEventStream(
nextSequenceNumber.Value,
uncommittedEvents.Source,
uncommittedEvents.Id,
uncommittedEvents.CorrelationId,
uncommittedEvents.Timestamp,
uncommittedEvents.Events
));
}
}
/// <summary>
///
/// </summary>
public EventMetadata(Events.EventMetadata @event, CommitMetadata commit)
{
Event = @event;
Commit = commit;
}
IEnumerable <EventData> CreateEventsFromUncomitted(UncommittedEventStream uncommittedEvents, CommitMetadata commitMetadata)
{
var events = new List <EventData>();
foreach (var @event in uncommittedEvents.Events)
{
events.Add(new EventData(
@event.Id,
_artifactTypeMap.GetTypeFor(@event.Metadata.Artifact).Name,
true,
_serializer.ToJsonBytes(@event.Event),
_serializer.ToJsonBytes(new EventMetadata(@event.Metadata, commitMetadata))
));
}
return(events);
}
