BookStore Cheat Sheet
IDs & Timestamps
csharp
1var id = Guid.CreateVersion7(); // ✅ UUIDv7
2var now = DateTimeOffset.UtcNow; // ✅ UTC timestamp
Event (past tense, record)
csharp
1public record BookAdded(Guid Id, string Title, decimal Price);
Command (record)
csharp
1public record AddBookCommand(string Title, decimal Price);
Aggregate Apply Method
csharp
1public void Apply(BookAdded @event)
2{
3 Id = @event.Id;
4 Title = @event.Title;
5}
Handler (static, Wolverine)
csharp
1public static class AddBookHandler
2{
3 public static BookAdded Handle(AddBookCommand cmd) =>
4 new(Guid.CreateVersion7(), cmd.Title, cmd.Price);
5}
HybridCache Query
csharp
1var result = await cache.GetOrCreateAsync(
2 $"books:{culture}",
3 async ct => await session.Query<BookProjection>().ToListAsync(ct),
4 tags: [CacheTags.BookList],
5 cancellationToken: ct);
Cache Invalidation
csharp
1await cache.RemoveByTagAsync(CacheTags.BookList, ct);
SSE Notification
csharp
1public record BookUpdatedNotification(Guid Id) : IDomainEventNotification;
TUnit Test
csharp
1[Test]
2public async Task Should_Create_Book()
3{
4 var result = await client.CreateBookAsync(request);
5 await Assert.That(result.Id).IsNotNull();
6}
Namespace
csharp
1namespace BookStore.ApiService.Handlers; // ✅ File-scoped
Related Skills
/wolverine__guide - All Wolverine write operations (create, update, delete)/marten__guide - Aggregates, projections, and query endpoints
