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Event Sourcing > Sql Stream Store

The core elements to enable Event Sourcing paradigms using the Sql Stream Store framework

Build Status

How To Use

Registration

• Asp.Net Standard/Core Dependency Injection

  • Use the provided services.AddInMemoryEventStore(Action<EventSourcingOptions> optionsAccessor, params Assembly[] eventAssemblies) method

• Other Containers

  • Register all instances required for IEventSourceProjection as Transient dependencies
  • Register an instance of GetEventTypes as a Singleton. EventCollection.GetEventTypes has been provided for this use case
  • Register an instance of IPersistentSubscriptionManager as a Singleton. PersistentSubscriptionManager has been provided for this use case
  • Register an instance of IEventPersistence as a Singleton. SqlEventStore has been provided for this use case
  • Register EventSubscription as a hosted service

Usage

Aggregates

• Task<T> GetById<T>(Guid id, CancellationToken cancellationToken = default) where T : class, IEventSourceAggregate

  • An asynchronous function to call when retrieving events from a stream in the shape of an Aggregate

• Task Save(IEventSourceAggregate aggregate, CancellationToken cancellationToken = default)

  • An asynchronous function to call when saving new events that have been applied to an Aggregate

Persistent Subscriptions

• Task<Guid> CreateCategorySubscription(string categoryName, Func<object, CancellationToken, Task> eventReceived, CancellationToken cancellationToken = default)

  • An asynchronous function to call when creating a subscription to a Category

• Task CloseSubscription(Guid subscriptionId, CancellationToken cancellationToken = new CancellationToken())

  • An asynchronous function to call when closing a subscription

• Task<int> CatchSubscriptionUp(string streamName, int checkpoint, Func<object, CancellationToken, Task> eventReceived, CancellationToken cancellationToken = default)

  • An asynchronous function to call when a stream has moved forward from a subscription, facilitates fast catch up.