public void Save(IAggregateRoot aggregate)
{
var uncommittedChanges = aggregate.GetUncommittedChanges();
var version = aggregate.Version;
foreach (var uncommittedChange in uncommittedChanges)
{
version++;
if (version > 2)
{
if (version % 3 == 0)
{
var originator = (IOriginator)aggregate;
var memento = originator.GetMemento();
memento.Version = version;
SaveMemento(memento);
}
}
uncommittedChange.Version = version;
_events.Add(uncommittedChange);
}
foreach (var uncommittedChange in uncommittedChanges)
{
dynamic targetEvent = Convert.ChangeType(uncommittedChange, uncommittedChange.GetType());
_eventBus.Publish(targetEvent);
}
}
public void SaveAggregate(IAggregateRoot aggregate)
{
var expectedVersion = aggregate.Version;
//get aggregate version by id
var version = eventStore.GetVersionByAggregate(aggregate.Id);
//check consistency...
if (version.HasValue && version != expectedVersion)
{
throw new ConsistencyException(aggregate.Id);
}
var newVersion = expectedVersion.HasValue ? expectedVersion : 0;
foreach (var @event in aggregate.GetUncommittedChanges())
{
newVersion++;
@event.Version = newVersion.Value;
eventStore.Save(@event);
eventBus.PublishEvent(@event);
}
aggregate.MarkChangesAsCommitted();
}
public virtual void Save(IAggregateRoot aggregateRoot, int expectedVersion)
{
var eventStorage = Ioc.Instance.Resolve <IEventStorage>();
if (!aggregateRoot.GetUncommittedChanges().Any())
{
//TODO: In order to debug, save single aggregate instance.
//return;
}
lock (Locker)
{
var entity = new TAggregateRoot();
if (expectedVersion != -1)
{
entity = GetById(aggregateRoot.Id);
}
if (entity.Version != expectedVersion)
{
throw new Exception($"Entity {aggregateRoot} has been modified previously");
}
eventStorage.Save(aggregateRoot);
}
}
private void TryMakeSnapshot(IAggregateRoot <TAuthenticationToken> aggregate)
{
if (!SnapshotStrategy.ShouldMakeSnapShot(aggregate))
{
return;
}
dynamic snapshot = aggregate.AsDynamic().GetSnapshot().RealObject;
snapshot.Version = aggregate.Version + aggregate.GetUncommittedChanges().Count();
SnapshotStore.Save(snapshot);
}
public void Save(IAggregateRoot aggregate)
{
if (aggregate is null)
{
throw new ArgumentNullException(nameof(aggregate));
}
_storage.SaveEvents(
aggregate.Id,
aggregate.GetUncommittedChanges().ToArray());
}
/// <summary>
/// Calls <see cref="ISnapshotStrategy{TAuthenticationToken}.ShouldMakeSnapShot"/> on <see cref="SnapshotStrategy"/>
/// If the <see cref="IAggregateRoot{TAuthenticationToken}"/> is snapshot-able <see cref="SnapshotAggregateRoot{TAuthenticationToken,TSnapshot}.GetSnapshot"/> is called
/// The <see cref="Snapshot.Version"/> is calculated, finally <see cref="ISnapshotStore.Save"/> is called on <see cref="SnapshotStore"/>.
/// </summary>
/// <param name="aggregate">The <see cref="IAggregateRoot{TAuthenticationToken}"/> to try and snapshot.</param>
protected virtual void TryMakeSnapshot(IAggregateRoot <TAuthenticationToken> aggregate)
{
if (!SnapshotStrategy.ShouldMakeSnapShot(aggregate))
{
return;
}
dynamic snapshot = aggregate.AsDynamic().GetSnapshot().RealObject;
var rsnapshot = snapshot as Snapshot;
if (rsnapshot != null)
{
rsnapshot.Version = aggregate.Version + aggregate.GetUncommittedChanges().Count();
SnapshotStore.Save(rsnapshot);
}
else
{
snapshot.Version = aggregate.Version + aggregate.GetUncommittedChanges().Count();
SnapshotStore.Save(snapshot);
}
}
public bool ShouldMakeSnapShot(IAggregateRoot <TAuthenticationToken> aggregate)
{
if (!IsSnapshotable(aggregate.GetType()))
{
return(false);
}
int i = aggregate.Version;
int limit = aggregate.GetUncommittedChanges().Count();
for (int j = 0; j < limit; j++)
{
if (++i % SnapshotInterval == 0 && i != 0)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Checks <see cref="IsSnapshotable"/> and if it is, also checks if the calculated version number would be exactly dividable by <see cref="GetSnapshotInterval"/>.
/// </summary>
/// <param name="aggregate">The <see cref="IAggregateRoot{TAuthenticationToken}"/> to check.</param>
public virtual bool ShouldMakeSnapShot(IAggregateRoot <TAuthenticationToken> aggregate)
{
if (!IsSnapshotable(aggregate.GetType()))
{
return(false);
}
// Why isn't this something as simple as `(aggregate.Version + aggregate.GetUncommittedChanges().Count()) % SnapshotInterval`???
int i = aggregate.Version;
int limit = aggregate.GetUncommittedChanges().Count();
for (int j = 0; j < limit; j++)
{
if (++i % GetSnapshotInterval() == 0 && i != 0)
{
return(true);
}
}
return(false);
}
/// <summary>
/// Checks <see cref="IsSnapshotable"/> and if it is, also checks if the calculated version number would be exactly dividable by <see cref="GetSnapshotInterval"/>.
/// </summary>
/// <param name="aggregate">The <see cref="IAggregateRoot{TAuthenticationToken}"/> to check.</param>
/// <param name="uncommittedChanges">A collection of uncommited changes to assess. If null the aggregate will be asked to provide them.</param>
public virtual bool ShouldMakeSnapShot(IAggregateRoot <TAuthenticationToken> aggregate, IEnumerable <IEvent <TAuthenticationToken> > uncommittedChanges = null)
{
if (!IsSnapshotable(aggregate.GetType()))
{
return(false);
}
// The reason this isn't as simple as `(aggregate.Version + aggregate.GetUncommittedChanges().Count()) % SnapshotInterval` is
// because if there are enough uncommited events that this would result in a snapshot, plus some left over, the final state is what will be generated
// when the snapshot is taken, thus this is a faster and more accurate assessment.
int limit = (uncommittedChanges ?? aggregate.GetUncommittedChanges()).Count();
int i = aggregate.Version - limit;
int snapshotInterval = GetSnapshotInterval();
for (int j = 0; j < limit; j++)
{
if (++i % snapshotInterval == 0 && i != 0)
{
return(true);
}
}
return(false);
}
public void Save(IAggregateRoot aggregateRoot, int expectedVersion)
{
if (!aggregateRoot.GetUncommittedChanges().Any())
{
return;
}
lock (Locker)
{
var entity = new TAggregateRoot();
if (expectedVersion != -1)
{
entity = GetById(aggregateRoot.Id);
}
if (entity.Version != expectedVersion)
{
throw new Exception($"Entity {aggregateRoot} has been modified previously");
}
_eventStorage.Save(entity);
}
}
public void Save(IAggregateRoot aggregate, int expectedRevision)
{
_storage.SaveEvents(aggregate.Id, aggregate.GetUncommittedChanges(), expectedRevision);
}
/// <summary>
/// Save all changes
/// </summary>
/// <param name="aggregate"></param>
/// <param name="handleEventsSynchronously"></param>
public async Task SaveAsync(IAggregateRoot aggregate)
{
await _eventStore.SaveEventsAsync(aggregate.Id, aggregate.CurrentVersion, aggregate.GetUncommittedChanges());
aggregate.MarkChangesAsCommitted();
}
