private static void FindChild(string isbn, Action <IActorRef> f)
{
var book = Context.Child(BookUtilities.CreateBookName(isbn));
if (book.IsNobody())
{
book = CreateBook(isbn);
}
f(book);
}
protected override void OnReceive(object message)
{
switch (message)
{
case GetBook book:
if (knownIds.Contains(BookUtilities.CreateBookName(book.Isbn)))
{
var task = readJournal
.CurrentEventsByPersistenceId(BookUtilities.CreateBookName(book.Isbn), 0,
long.MaxValue)
.RunAggregate(new BookLookupResult(), ReadBook, mat);
task.Wait();
Sender.Tell(task.Result);
}
else
{
Sender.Tell(new BookNotFound());
}
break;
}
}
private static IActorRef CreateBook(string isbn) => Context.ActorOf(Book.props, BookUtilities.CreateBookName(isbn));
