Simone Sanfratello

Event based cache invalidation in GraphQL

Stop serving stale data. Use event-based invalidation to keep your GraphQL cache instantly up-to-date.

Event based cache invalidation in GraphQL
#1about 2 minutes

Understanding GraphQL resolvers as cacheable functions

GraphQL resolvers can be treated as pure functions, allowing their results to be memoized and cached based on query arguments.

#2about 5 minutes

Comparing time-based and event-based cache invalidation

Time-based invalidation is simple but can serve stale data, whereas event-based invalidation keeps data synced but is more complex to implement.

#3about 4 minutes

Choosing a storage backend and generating cache keys

A cache can use fast in-memory storage for small, frequent data or a shared Redis instance for larger datasets across multiple nodes.

#4about 4 minutes

Using references for targeted cache invalidation

By tagging cache entries with references to the underlying data entities, you can precisely invalidate them when a write event occurs.

#5about 7 minutes

Live demo of setting up a basic GraphQL server

A Fastify server is configured with the Mercurius plugin to serve a GraphQL schema with user and country data from an in-memory database.

#6about 3 minutes

Live demo of implementing a time-based cache policy

The Mercurius Cache plugin is configured with a time-to-live policy for a query, using onHit and onMiss events to verify its effectiveness.

#7about 5 minutes

Live demo of solving stale data with event invalidation

An invalidation function is added to a mutation resolver, which uses references to clear the relevant user data from the cache upon update.

#8about 3 minutes

Exploring advanced features of Mercurius Cache

Mercurius Cache also supports custom key generation, request deduplication, programmatic invalidation with wildcards, and garbage collection for references.

#9about 4 minutes

Q&A on career advice and GraphQL best practices

Common GraphQL pitfalls are discussed, such as neglecting to use DataLoaders to solve the N+1 query problem.

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Matching moments

Q&A on cache strategies and dynamic content
32:15 MIN

Q&A on cache strategies and dynamic content

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Addressing GraphQL security and implementation challenges
17:32 MIN

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Implementing frontend caching in React Native apps
13:39 MIN

Implementing frontend caching in React Native apps

Optimizing Your App for Success: Tips and Techniques for managing slow devices

Q&A on GraphQL, team structure, and vendor software
44:31 MIN

Q&A on GraphQL, team structure, and vendor software

Building high performance and scalable architectures for enterprises

Using caching to manage slow network device responses
03:37 MIN

Using caching to manage slow network device responses

Challenges of building React and React Native apps

Q&A on sessions, features, and performance
26:57 MIN

Q&A on sessions, features, and performance

Modern Headless Commerce with Vendure

The challenges of building GraphQL APIs with resolvers
26:59 MIN

The challenges of building GraphQL APIs with resolvers

Putting the Graph In GraphQL With The Neo4j GraphQL Library

Q&A on GraphQL, accessibility testing, and feature flags
36:35 MIN

Q&A on GraphQL, accessibility testing, and feature flags

Scalable architecture for mobile apps

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From learning to earning

Jobs that call for the skills explored in this talk.

Full Stack Engineer

Full Stack Engineer

Climax.eco
Rotterdam, Netherlands

€70-100K
Senior
ETL
UX Design
PostgreSQL
Unit Testing
+1