public IEnumerable <string> ETags()
{
return(sourceSnapshot.IfNotNull()
.Then(s => s.ETags)
.Else(() => new string[0])
.Concat(eventHistory.Select(e => e.ETag).Distinct()));
}
/// <summary>
/// Initializes a new instance of the <see cref="EventSourcedAggregate{T}"/> class.
/// </summary>
/// <param name="snapshot">A snapshot of the aggregate's built-up state.</param>
protected internal EventSourcedAggregate(ISnapshot snapshot)
: this(snapshot.IfNotNull()
.Then(s => s.AggregateId)
.ElseThrow(() => new ArgumentNullException(nameof(snapshot))))
{
sourceSnapshot = snapshot;
}
/// <summary>
/// Initializes a new instance of the <see cref="EventSourcedAggregate{T}"/> class.
/// </summary>
/// <param name="snapshot">A snapshot of the aggregate's built-up state.</param>
protected internal EventSourcedAggregate(ISnapshot snapshot)
: this(snapshot.IfNotNull()
.Then(s => s.AggregateId)
.ElseThrow(() => new ArgumentNullException(nameof(snapshot))))
{
sourceSnapshot = snapshot;
}
/// <summary>
/// Initializes a new instance of the <see cref="EventSourcedAggregate{T}"/> class.
/// </summary>
/// <param name="snapshot">A snapshot of the aggregate's built-up state.</param>
/// <param name="eventHistory">The event history.</param>
protected internal EventSourcedAggregate(ISnapshot snapshot, IEnumerable <IEvent> eventHistory = null) :
this(snapshot.IfNotNull()
.Then(s => s.AggregateId)
.ElseThrow(() => new ArgumentNullException("snapshot")))
{
sourceEvents = eventHistory.OrEmpty().ToArray();
sourceSnapshot = snapshot;
}
/// <summary>
/// Initializes a new instance of the <see cref="EventSourcedAggregate{T}"/> class.
/// </summary>
/// <param name="snapshot">A snapshot of the aggregate's built-up state.</param>
/// <param name="eventHistory">The event history.</param>
protected internal EventSourcedAggregate(ISnapshot snapshot, IEnumerable<IEvent> eventHistory = null) :
this(snapshot.IfNotNull()
.Then(s => s.AggregateId)
.ElseThrow(() => new ArgumentNullException("snapshot")))
{
sourceEvents = eventHistory.OrEmpty().ToArray();
SourceSnapshot = snapshot;
}
/// <summary>
/// Initializes a new instance of the <see cref="EventSourcedAggregate{T}"/> class.
/// </summary>
/// <param name="snapshot">A snapshot of the aggregate's built-up state.</param>
/// <param name="eventHistory">The event history.</param>
protected internal EventSourcedAggregate(ISnapshot snapshot, IEnumerable <IEvent> eventHistory = null)
: this(snapshot.IfNotNull().Then(s => s.AggregateId).ElseThrow(() => new ArgumentNullException(nameof(snapshot))))
{
SourceSnapshot = snapshot;
InitializeEventHistory(eventHistory.OrEmpty());
}
/// <summary>
/// Initializes a new instance of the <see cref="EventSourcedAggregate{T}"/> class.
/// </summary>
/// <param name="snapshot">A snapshot of the aggregate's built-up state.</param>
/// <param name="eventHistory">The event history.</param>
protected internal EventSourcedAggregate(ISnapshot snapshot, IEnumerable<IEvent> eventHistory = null)
: this(snapshot.IfNotNull().Then(s => s.AggregateId).ElseThrow(() => new ArgumentNullException(nameof(snapshot))))
{
SourceSnapshot = snapshot;
InitializeEventHistory(eventHistory.OrEmpty());
}