durable-objects

You coordinate stateful logic at the edge by implementing a Durable Object class that extends DurableObject, using deterministic routing with getByName to maintain per-entity state and expose RPC methods.

SQLite-backed storage within a Durable Object provides durable state persistence for each logical coordination unit, ensuring consistent data storage and enabling reliable scheduled tasks via alarms.

The best way to test Durable Objects and configure wrangler migrations is using Vitest for testing alongside wrangler configuration, ensuring proper initialization and observability for per-entity lifecycles.

Yes, you can use WebSockets and RPC methods together in a Cloudflare Durable Object to enable persistent connections and coordinate real-time interactions across distributed workers.

Use Durable Objects for per-entity coordination when you need deterministic routing, consistent SQLite-backed storage, and real-time interactions across distributed workers for units like chat rooms or games.

Durable Objects maintain state consistently by enforcing deterministic routing with getByName and SQLite-backed storage, so failures often stem from improper initialization or incorrect wrangler migration configurations.