Question 1

How does Hub compare to using RabbitMQ directly in Go?

Accepted Answer

Hub is a lightweight, in-memory library for internal event communication within a Go application, offering high performance without external dependencies. RabbitMQ is a full-featured message broker with persistence, durability, and cross-language support, but adds operational overhead. Use Hub for fast, intra-process messaging; RabbitMQ for distributed, persistent systems.

Question 2

How to handle failed messages or retries with Hub?

Accepted Answer

Hub does not have built-in retry mechanisms or dead-letter queues. You need to implement custom logic in subscribers, such as catching errors and re-publishing messages with delays. For reliable delivery, consider using blocking subscribers and adding external persistence if necessary.

Question 3

Is Hub suitable for microservices architecture?

Accepted Answer

Hub is best for intra-service event communication within a single Go application, decoupling components internally. For microservices, it can handle high-throughput events within a service, but inter-service communication typically requires external brokers or APIs, as Hub lacks cross-process features.

Question 4

What are the performance trade-offs of non-blocking subscribers?

Accepted Answer

Non-blocking subscribers prevent publisher blocking by dropping messages when buffers are full, trading reliability for speed. This is acceptable for non-critical data like logs, but for important messages, use blocking subscribers with appropriately sized buffers to avoid loss.

Question 5

How to scale Hub for high-load applications?

Accepted Answer

Hub scales within a single process by optimizing subscriber capacity and using multiple instances if needed. However, it lacks clustering or replication features, so for distributed scaling, you might need to integrate with external systems or message brokers.

hub

What is hub?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Open Source Alternative To

Frequently Asked Questions