Question 1

How to integrate Projac with EventStore in a .NET Core app?

Accepted Answer

Wire up EventStore's subscription to Projac's projection handlers by configuring the connection and defining projection logic using the provided syntax. Refer to the wiki for specific examples and code snippets to streamline the process.

Question 2

Projac vs Marten for projections in .NET: which should I use?

Accepted Answer

Projac is store-agnostic and supports multiple databases, while Marten is tightly integrated with PostgreSQL and offers built-in event sourcing. Choose Projac for flexibility across diverse stores, but Marten if you prefer an all-in-one solution with PostgreSQL.

Question 3

Can Projac handle projections to MongoDB or other NoSQL databases?

Accepted Answer

Yes, Projac's store-agnostic design allows you to bring your own connection, so you can implement projections for MongoDB or any NoSQL database by creating custom providers or using existing .NET drivers within the projection handlers.

Question 4

What are the performance implications of using Projac for high-volume event streams?

Accepted Answer

Performance depends on your implementation and database choice; Projac itself is lightweight, but you'll need to optimize projection logic with batching and async operations. Monitor database interactions to handle throughput efficiently in event-sourced systems.

Question 5

How to add error handling or retries in Projac projections?

Accepted Answer

Projac doesn't provide built-in retry mechanisms, so you must implement error handling in your projection handlers or at the event store subscription level. This adds control but requires additional code for resilience in failure scenarios.

Question 6

Is Projac suitable for microservices architectures?

Accepted Answer

Yes, Projac can be used in microservices to build read models from event streams, but ensure proper service boundaries and consider scalability. Plan for distributed tracing and database management to avoid bottlenecks in production.

Projac

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