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Cloudflare Durable Objects Design Patterns

When a new paradigm like Cloudflare Durable Objects comes along, it takes a while to effectively take advantage of it. This publication is my contribution to accelerating that progress. Minimize boilerplate and risk. Maximize evolvability and speed of development.

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Larry Maccherone in Cloudflare Durable Objects Design Patterns

Hydrating from external sources

My simpler hydrate function will work in the vast majority of cases but if you ever need to hydrate from an external source, I believe this code from @crabmusket on Discord will allow for that.

Larry Maccherone in Cloudflare Durable Objects Design Patterns

Lazy hydration

When you keep state in your durable object instance properties, this is a patten to lazy rehydrate whenever your DO is reinstantiated.

Larry Maccherone in Cloudflare Durable Objects Design Patterns

Introduction and Table of Contents

A publication for accelerating learning around Cloudflare Durable Objects

You wouldn’t be here if you didn’t already understand that there is a lot to love about Cloudflare’s Durable Objects…

Larry Maccherone in Cloudflare Durable Objects Design Patterns

Maintaining consistent state

Cloudflare durable objects maintain consistency in light of storage write failure, but not when your code throws an unexpected error.