/// <summary>
/// Creates a new instance of the <see cref="VersionedAggregate{TState,TCommand,TEvent}"/>
/// </summary>
/// <param name="id">Aggregate id.</param>
/// <param name="commandHandler">Command handler.</param>
/// <param name="eventHandler">Event handler.</param>
/// <param name="aggregate">Aggregate.</param>
public VersionedAggregate(string id, Func <TState, TCommand, TEvent> commandHandler, Func <TState, TEvent, TState> eventHandler,
IConcurrentVersions <TState, TEvent> aggregate = null)
{
Id = id;
CommandHandler = commandHandler;
EventHandler = eventHandler;
Aggregate = aggregate;
}
public static IConcurrentVersions <TVersioned, TUpdated> Resolve <TVersioned, TUpdated>(
this IConcurrentVersions <TVersioned, TUpdated> versions, VectorTime selectedTimestamp)
{
var vt = versions.All
.Select(x => x.VectorTimestamp)
.Aggregate(VectorTime.Zero, (time, vectorTime) => time.Merge(vectorTime));
var st = versions.All
.Select(x => x.SystemTimestamp)
.Max();
return(versions.Resolve(selectedTimestamp, vt, st));
}
public static IConcurrentVersions <T1, T2> Resolve <T1, T2>(this IConcurrentVersions <T1, T2> versions, VectorTime selectedTimestamp)
{
var vectorTime = VectorTime.Zero;
DateTime systemTime = default;
foreach (var versioned in versions.All)
{
vectorTime = vectorTime.Merge(versioned.VectorTimestamp);
systemTime = versioned.SystemTimestamp > systemTime ? versioned.SystemTimestamp : systemTime;
}
return(versions.Resolve(selectedTimestamp, vectorTime, systemTime));
}
public static bool IsConflicting <TVersioned, TUpdated>(this IConcurrentVersions <TVersioned, TUpdated> versions) => versions.All.Count() > 1;
protected ConcurrentVersionsSpec()
{
this.versions = Create();
}
