public async Task AppendAsync(
IAggregateId aggregateId,
IReadOnlyList <IDomainEvent> domainEvents,
long expectedVersion)
{
if (domainEvents.Count > 0)
{
var connection = await _connectionProvider.GrabConnection();
var results = await connection.ConditionalAppendToStreamAsync(
aggregateId.ToStreamName(_eventStoreName),
expectedVersion,
domainEvents.Select(e => e.ToEventData()));
switch (results.Status)
{
case ConditionalWriteStatus.Succeeded:
break;
case ConditionalWriteStatus.VersionMismatch:
throw new VersionMismatchException(aggregateId.ToStreamName(_eventStoreName), expectedVersion);
case ConditionalWriteStatus.StreamDeleted:
throw new StreamDeletedException(aggregateId.ToStreamName(_eventStoreName));
default:
throw new ArgumentOutOfRangeException(nameof(results.Status), results.Status.ToString());
}
}
}
public async Task <IReadOnlyList <IDomainEvent> > AsyncLoadAllEventsFor(IAggregateId aggregateId)
{
var connection = await _connectionProvider.GrabConnection();
var resolvedEvents = await connection.ReadAllStreamEventsForward(aggregateId.ToStreamName(_eventStoreName));
return(resolvedEvents.Select(e => e.Event.ToDomainEvent()).ToList());
}
public Task <Result <T> > Get <T>(IAggregateId aggregateId) where T : AggregateRoot, new() =>
_aggregateCache.TryFetch(aggregateId)
.Unwrap(
cachedAggregate => cachedAggregate.TryTakeValue <T>()
.Unwrap(
aggregate => Task.FromResult(Result.Ok(aggregate)),
() => _store.Get <T>(aggregateId)),
() => _store.Get <T>(aggregateId));
public TestCommand(IAggregateId id)
{
var c = Guid.NewGuid();
this.CorrelationId = c;
this.CausationId = c;
AggregateId = id;
}
/// <summary>
/// Retrieves existing aggregate from the store and executes the <see cref="aggregateTransformer"/> in
/// order to pass some command to the aggregate. As a result of <see cref="aggregateTransformer"/> execution
/// all changes of the aggregate will be persisted in the database.
/// </summary>
/// <param name="store"><see cref="IStore"/> instance which is used to transform the aggregate.</param>
/// <param name="aggregateId">Unique ID of an aggregate.</param>
/// <param name="aggregateTransformer">Generic transformer function that will be called if aggregate exists.</param>
/// <returns>Returns success if aggregate has been found and transformer executed without errors.</returns>
public static Task <Result> Borrow <T>(
this IStore store,
IAggregateId aggregateId,
Func <T, Result <T> > aggregateTransformer)
where T : AggregateRoot, new()
{
return(store.Borrow <T>(aggregateId, aggregate => Task.FromResult(aggregateTransformer(aggregate))));
}
/// <summary>
/// Borrow method with async aggregate transformer.
/// </summary>
public static Task <Result> Borrow <T>(
this IStore store,
IAggregateId aggregateId,
Func <T, Task <Result <T> > > aggregateTransformer)
where T : AggregateRoot, new() =>
store.Get <T>(aggregateId)
.OnSuccess(aggregateTransformer)
.OnSuccess(aggregate => store.SaveChanges(aggregate))
.OnFailure(
AggregateVersionMismatchError,
() => store.Borrow(aggregateId, aggregateTransformer));
public static IEvent AddTestMetaData <TState>(this IEvent @event, IAggregateId id, int version = 0)
{
var(aggregateName, streamName) = typeof(TState).Name.AsStreamName(id);
if (@event.Meta == null)
{
@event.Meta = new Dictionary <string, string>();
}
@event.Tap(e => e.Meta.AddTypeInfo(e));
@event.Meta.AddMetaData(version, streamName, aggregateName, new TestCommand(id));
@event.Meta["test.statetype"] = typeof(TState).AssemblyQualifiedName;
return(@event);
}
public async Task <Result <T> > Get <T>(IAggregateId aggregateId) where T : AggregateRoot, new()
{
var domainEvents = await _eventStoreAppender.AsyncLoadAllEventsFor(aggregateId);
if (domainEvents.Count > 0)
{
var aggregateRoot = ReconstructAggregateFrom <T>(domainEvents);
return(Ok(aggregateRoot));
}
return(Fail <T>(AggregateNotFoundInStore(aggregateId.Id)));
}
public Task <Result <T> > Get <T>(IAggregateId aggregateId) where T : AggregateRoot, new()
{
if (!_domainEventsPerAggregate.TryGetValue(aggregateId.Id, out var domainEvents))
{
return(Task.FromResult(Fail <T>(AggregateNotFoundInStore(aggregateId.Id))));
}
var optionalAggregateRoot = ReconstructAggregateFrom <T>(domainEvents);
return(optionalAggregateRoot.Unwrap(
aggregateRoot => Task.FromResult(Ok(aggregateRoot)),
() => throw new InvalidOperationException($"Unable to find any events for aggregate with ID '{aggregateId}'.")));
}
public List <IDomainEvent> GetAll(IAggregateId aggregateId)
{
var file = File.ReadAllLines(GetFileName(aggregateId.Value));
var domainEvents = new List <IDomainEvent>();
foreach (var line in file)
{
var domainEvent = JsonConvert.DeserializeObject <IDomainEvent>(line, _jsonSerializerSettings);
if (domainEvent == null)
{
continue;
}
domainEvents.Add(domainEvent);
}
return(domainEvents);
}
//public void Add(EventsWrapper eventsWrapper)
//{
// if (_dictionary.ContainsKey(eventsWrapper.AggregateId))
// {
// var domainEvents = _dictionary[eventsWrapper.AggregateId];
// var sequenceId = domainEvents.Count;
// if (sequenceId >= eventsWrapper.SequenceId) throw new SequenceAlreadyStoredException();
// domainEvents.AddRange(eventsWrapper.DomainEvents);
// return;
// }
// foreach (var domainEvent in eventsWrapper.DomainEvents)
// {
// _dictionary.Add(eventsWrapper.AggregateId, new List<IDomainEvent> { domainEvent });
// }
//}
public void Add(IDomainEvent domainEvent, int sequenceId)
{
IAggregateId aggregateId = domainEvent.GetAggregateId();
if (_dictionary.ContainsKey(aggregateId))
{
var domainEvents = _dictionary[aggregateId];
if (domainEvents.Count >= sequenceId)
{
throw new SequenceAlreadyStoredException();
}
domainEvents.Add(domainEvent);
return;
}
_dictionary.Add(aggregateId, new List <IDomainEvent> {
domainEvent
});
}
public List <IDomainEvent> GetAll(IAggregateId aggregateId)
{
var connection = Connection();
var readEvents = connection.ReadStreamEventsForwardAsync("newstream", 0, 10, true).Result;
connection.Close();
List <IDomainEvent> domainEvents = new List <IDomainEvent>();
foreach (var evt in readEvents.Events)
{
var domainEvent = JsonConvert.DeserializeObject <IDomainEvent>(Encoding.UTF8.GetString(evt.Event.Data),
_jsonSerializerSettings);
if (domainEvent == null)
{
continue;
}
domainEvents.Add(domainEvent);
}
return(domainEvents);
}
public static void Given <TState>(this ITestContext context, IAggregateId id, params EventRecord[] events) => context.Given(events.Select(e => EventEnvelope.Create(id.Id, e).AddTestMetaData <TState>(id)).ToArray());
public TestEvent(IAggregateId id) : this(id.Id)
{
}
public static string ToStreamName(this IAggregateId aggregateId, string eventStoreName)
=> $"{eventStoreName}|{aggregateId.TypeName}|{aggregateId.Id}";
private int GetSequenceId(IAggregateId aggregateId)
{
return(File.Exists(GetFileName(aggregateId.Value))
? File.ReadAllLines(GetFileName(aggregateId.Value)).Length
: 0);
}
protected Aggregate(IAggregateId rootId)
{
this.RootId = rootId;
}
public int CompareTo(IAggregateId other) => string.Compare(Id, other.Id, StringComparison.Ordinal);
public void Clear(IAggregateId aggregateId)
{
File.Delete(GetFileName(aggregateId.Value));
}
public static void Given <TState>(this ITestContext context, IAggregateId id, params IEvent[] events) => context.Given(events.Select(e => e.AddTestMetaData <TState>(id)).ToArray());
public static async Task SaveAsync(this IStateStore stateManager, IAggregateId aggregateId, object state, long version, IEvent[] events, Type type)
{
var mi = typeof(IStateStore).GetMethod("SaveAsync").MakeGenericMethod(type);
await mi.InvokeAsync <bool>(stateManager, d => true, false, aggregateId, state, version, events);
}
public void Clear(IAggregateId aggregateId)
{
throw new NotImplementedException();
}
public List <IDomainEvent> GetAll(IAggregateId aggregateId)
{
return(_dictionary.ContainsKey(aggregateId)
? _dictionary[aggregateId]
: new List <IDomainEvent>());
}
public ItemAddedEvent(IAggregateId aggregateId)
{
this.AggregateId = Guid.Parse(aggregateId.ToString());
}
public WaitingOrder(IAggregateId id, int numberColis)
{
Id = id;
NumberColis = numberColis;
}
public static Task <T> GetAsync <T, TStream>(this IEventStore store, IAggregateId id)
where T : class, new()
=> store.GetAsync <T>(typeof(TStream).Name.AsStreamName(id).StreamName);
public static async Task <(object Value, long Version)> GetAsync(this IStateStore stateManager, Type type, IAggregateId aggregateId)
{
var mi = typeof(IStateStore).GetMethod("GetAsync").MakeGenericMethod(type);
return(await mi.InvokeAsync <(object, long)>(stateManager, d => (d.Item1, d.Item2), true, aggregateId));
}
protected MongoAggregate(IAggregateId rootId)
: base(rootId)
{
}
public void Clear(IAggregateId aggregateId)
{
_dictionary.Remove(aggregateId);
}
public async Task <WorkItemReadModel> Find(IAggregateId id)
{
return(await readDatabase.WorkItems.FirstOrDefaultAsync(x => x.Id == id.Value));
}
