Question 1

How to persist events with EventBus in Elixir?

Accepted Answer

EventBus uses ETS for in-memory storage; for persistence, you need to use addons like event_bus_postgres or implement a custom subscriber to save events to a database, as described in the Event Storage Details section.

Question 2

EventBus vs GenStage for event processing in Elixir?

Accepted Answer

EventBus is a lightweight publish-subscribe library with built-in storage and observation, ideal for decoupled communication. GenStage is for back-pressure and data processing pipelines; choose EventBus for simple event routing and GenStage for complex flow control.

Question 3

Can EventBus handle events in a distributed Elixir cluster?

Accepted Answer

No, EventBus is designed for single-node use with ETS; for distributed events, you'd need to integrate it with tools like Phoenix PubSub or implement custom distribution logic on top.

Question 4

How to monitor event processing errors in EventBus?

Accepted Answer

Use the built-in event watcher to track status via ETS tables, and consider addons like event_bus_metrics for UI and API endpoints to visualize metrics and debug issues.

Question 5

What's the best way to generate unique event IDs in EventBus?

Accepted Answer

The README recommends using a UUID library and provides config options for ID generators, such as EventBus.Util.Base62, to ensure uniqueness per topic.

Question 6

How to set up EventBus in a Phoenix application?

Accepted Answer

Add :event_bus to your mix.exs dependencies, include it in the applications list, and register topics in config.exs; then use EventBus.subscribe and EventBus.notify as shown in the Usage section.

Event Bus

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