public Task <SerializedSnapshot> SerilizeAsync <TAggregate, TIdentity, TSnapshot>(
SnapshotContainer snapshotContainer,
CancellationToken cancellationToken)
where TAggregate : ISnapshotAggregateRoot <TIdentity, TSnapshot>
where TIdentity : IIdentity
where TSnapshot : ISnapshot
{
var snapsnotDefinition = _snapshotDefinitionService.GetDefinition(typeof(TSnapshot));
_log.Verbose(() => $"Building snapshot '{snapsnotDefinition.Name}' v{snapsnotDefinition.Version} for {typeof(TAggregate).PrettyPrint()}");
var updatedSnapshotMetadata = new SnapshotMetadata(snapshotContainer.Metadata.Concat(new Dictionary <string, string>
{
{ SnapshotMetadataKeys.SnapshotName, snapsnotDefinition.Name },
{ SnapshotMetadataKeys.SnapshotVersion, snapsnotDefinition.Version.ToString() },
}));
var serializedMetadata = _jsonSerializer.Serialize(updatedSnapshotMetadata);
var serializedData = _jsonSerializer.Serialize(snapshotContainer.Snapshot);
return(Task.FromResult(new SerializedSnapshot(
serializedMetadata,
serializedData,
updatedSnapshotMetadata)));
}
protected void ApplyCommittedEvent <TAggregateEvent>(ICommittedEvent <TAggregate, TIdentity, TAggregateEvent> committedEvent)
where TAggregateEvent : class, IAggregateEvent <TAggregate, TIdentity>
{
var applyMethods = GetEventApplyMethods(committedEvent.AggregateEvent);
applyMethods(committedEvent.AggregateEvent);
Log.Info("Aggregate of Name={0}, and Id={1}; committed and applied an AggregateEvent of Type={2}.", Name, Id, typeof(TAggregateEvent).PrettyPrint());
Version++;
var domainEvent = new DomainEvent <TAggregate, TIdentity, TAggregateEvent>(Id, committedEvent.AggregateEvent, committedEvent.Metadata, committedEvent.Timestamp, Version);
Publish(domainEvent);
ReplyIfAvailable();
if (!SnapshotStrategy.ShouldCreateSnapshot(this))
{
return;
}
var aggregateSnapshot = CreateSnapshot();
if (aggregateSnapshot == null)
{
return;
}
_snapshotDefinitionService.Load(aggregateSnapshot.GetType());
var snapshotDefinition = _snapshotDefinitionService.GetDefinition(aggregateSnapshot.GetType());
var snapshotMetadata = new SnapshotMetadata
{
AggregateId = Id.Value,
AggregateName = Name.Value,
AggregateSequenceNumber = Version,
SnapshotName = snapshotDefinition.Name,
SnapshotVersion = snapshotDefinition.Version
};
var committedSnapshot =
new CommittedSnapshot <TAggregate, TIdentity, IAggregateSnapshot <TAggregate, TIdentity> >(
Id,
aggregateSnapshot,
snapshotMetadata,
committedEvent.Timestamp, Version);
SaveSnapshot(committedSnapshot);
}
protected void ApplyCommittedEvent <TAggregateEvent>(ICommittedEvent <TAggregate, TIdentity, TAggregateEvent> committedEvent)
where TAggregateEvent : IAggregateEvent <TAggregate, TIdentity>
{
var applyMethods = GetEventApplyMethods(committedEvent.AggregateEvent);
applyMethods(committedEvent.AggregateEvent);
Logger.Info($"[{Name}] With Id={Id} Commited and Applied [{typeof(TAggregateEvent).PrettyPrint()}]");
Version++;
var domainEvent = new DomainEvent <TAggregate, TIdentity, TAggregateEvent>(Id, committedEvent.AggregateEvent, committedEvent.Metadata, committedEvent.Timestamp, Version);
Publish(domainEvent);
ReplyIfAvailable();
if (SnapshotStrategy.ShouldCreateSnapshot(this))
{
var aggregateSnapshot = CreateSnapshot();
if (aggregateSnapshot != null)
{
_snapshotDefinitionService.Load(aggregateSnapshot.GetType());
var snapshotDefinition = _snapshotDefinitionService.GetDefinition(aggregateSnapshot.GetType());
var snapshotMetadata = new SnapshotMetadata
{
AggregateId = Id.Value,
AggregateName = Name.Value,
AggregateSequenceNumber = Version,
SnapshotName = snapshotDefinition.Name,
SnapshotVersion = snapshotDefinition.Version
};
var commitedSnapshot =
new ComittedSnapshot <TAggregate, TIdentity, IAggregateSnapshot <TAggregate, TIdentity> >(
Id,
aggregateSnapshot,
snapshotMetadata,
committedEvent.Timestamp, Version);
SaveSnapshot(commitedSnapshot);
}
}
}
public virtual void Emit <TAggregateEvent>(TAggregateEvent aggregateEvent, IMetadata metadata = null)
where TAggregateEvent : IAggregateEvent <TAggregate, TIdentity>
{
if (aggregateEvent == null)
{
throw new ArgumentNullException(nameof(aggregateEvent));
}
_eventDefinitionService.Load(typeof(TAggregateEvent));
var eventDefinition = _eventDefinitionService.GetDefinition(typeof(TAggregateEvent));
var aggregateSequenceNumber = Version + 1;
var eventId = EventId.NewDeterministic(
GuidFactories.Deterministic.Namespaces.Events,
$"{Id.Value}-v{aggregateSequenceNumber}");
var now = DateTimeOffset.UtcNow;
var eventMetadata = new Metadata
{
Timestamp = now,
AggregateSequenceNumber = aggregateSequenceNumber,
AggregateName = Name.Value,
AggregateId = Id.Value,
EventId = eventId,
EventName = eventDefinition.Name,
EventVersion = eventDefinition.Version
};
eventMetadata.Add(MetadataKeys.TimestampEpoch, now.ToUnixTime().ToString());
if (metadata != null)
{
eventMetadata.AddRange(metadata);
}
var committedEvent = new CommittedEvent <TAggregate, TIdentity, TAggregateEvent>(Id, aggregateEvent, eventMetadata, now, Version);
Persist(committedEvent, ApplyCommittedEvents);
Logger.Info($"[{Name}] With Id={Id} Commited [{typeof(TAggregateEvent).PrettyPrint()}]");
Version++;
var domainEvent = new DomainEvent <TAggregate, TIdentity, TAggregateEvent>(Id, aggregateEvent, eventMetadata, now, Version);
Publish(domainEvent);
if (SnapshotStrategy.ShouldCreateSnapshot(this))
{
var aggregateSnapshot = CreateSnapshot();
if (aggregateSnapshot != null)
{
var t = aggregateSnapshot.GetType();
_snapshotDefinitionService.Load(aggregateSnapshot.GetType());
var snapshotDefinition = _snapshotDefinitionService.GetDefinition(aggregateSnapshot.GetType());
var snapshotMetadata = new SnapshotMetadata
{
AggregateId = Id.Value,
AggregateName = Name.Value,
AggregateSequenceNumber = Version,
SnapshotName = snapshotDefinition.Name,
SnapshotVersion = snapshotDefinition.Version
};
var commitedSnapshot =
new ComittedSnapshot <TAggregate, TIdentity, IAggregateSnapshot <TAggregate, TIdentity> >(
Id,
aggregateSnapshot,
snapshotMetadata,
now, Version);
SaveSnapshot(commitedSnapshot);
}
}
}
