DDD+CQRS+Event-sourcing examples using EventFlow following CQRS-ES architecture. It is configured with RabbitMQ, MongoDB(Snapshot store), PostgreSQL(Read store), EventStore(GES). It's targeted to .Net Core 2.2 and include docker compose file.
The most common CQRS/ES architecture would look like following diagram
The example consists of the following concepts, each shown below
- Aggregates
- Command bus and commands
- Synchronous subscriber
- Event store (GES)
- In-memory read model.
- Snapshots (MongoDb)
- Sagas
- Event publising (In-memory, RabbitMq)
- Metadata
- Command bus decorator, custom value object, custom execution result, ...
var resolver = EventFlowOptions.New .UseAutofacContainerBuilder(new ContainerBuilder()) .Configure(c => c.ThrowSubscriberExceptions = true) .AddEvents(typeof(ExampleEvent)) .AddEvents(typeof(ResetEvent)) .AddCommands(typeof(ExampleCommand)) .AddCommands(typeof(ResetCommand)) .AddCommandHandlers(typeof(ExampleCommandHandler)) .AddCommandHandlers(typeof(ResetCommandHandler)) .ConfigureEventStore() .ConfigureMongoDb(client, SNAPSHOT_CONTAINER_NAME) .AddSnapshots(typeof(ExampleSnaphost)) .UseMongoDbSnapshotStore() .RegisterServices(sr => sr.Register(i => SnapshotEveryFewVersionsStrategy.Default)) .RegisterServices(DecorateCommandBus) .PublishToRabbitMq(RabbitMqConfiguration.With(new Uri(@"amqp://test:test@localhost:5672"), true, 4, "eventflow")) .UseInMemoryReadStoreFor<Aggregates.ReadModels.ExampleReadModel>() .AddJobs(typeof(ExampleJob)) .CreateResolver());
- Fork it ( https://github.com/OKTAYKIR/EventFlow.Example/fork )
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create a new Pull Request
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Apache-2.0 © Oktay Kır