@envelop/response-cache-redis

@envelop/response-cache-redis

• Supports redis cache for @envelop/response-cache plugin
• Suitable for serverless deployments where the LRU In-Memory Cache is not possible

Check out the GraphQL Response Cache Guide for more information

Getting Started

yarn add @envelop/response-cache
yarn add @envelop/response-cache-redis

Usage Example

In order to use the Redis cache, you need to:

• Create a Redis database
• Collect the connection settings (or its connection string), e.g., host, port, username, password, tls, etc.
• Create and configure a Redis client with your connection settings and any additional options
• Create an instance of the Redis Cache and set to the useResponseCache plugin options

import { parse, validate, specifiedRules, execute, subscribe } from 'graphql'
import { envelop, useEngine } from '@envelop/core'
import { useResponseCache } from '@envelop/response-cache'
import { createRedisCache } from '@envelop/response-cache-redis'
import Redis from 'ioredis'

/**
 * For additional Redis options to create the ioredis client
 * @see: https://github.com/luin/ioredis/blob/master/API.md#new_Redis_new
 *
 **/
const redis = new Redis({
  host: 'my-redis-db.example.com',
  port: '30652',
  password: '1234567890'
})

// or, you can also specify connection options as a redis:// URL or rediss:// URL when using TLS encryption
const redis = new Redis('rediss://:[e-mail]:30652')

const cache = createRedisCache({ redis })

const getEnveloped = envelop({
  plugins: [
    useEngine({ parse, validate, specifiedRules, execute, subscribe }),
    // ... other plugins ...
    useResponseCache({ cache })
  ]
})

Invalidate Cache based on custom logic

import { execute, parse, specifiedRules, subscribe, validate } from 'graphql'
import { envelop, useEngine } from '@envelop/core'
import { useResponseCache } from '@envelop/response-cache'
import { createRedisCache } from '@envelop/response-cache-redis'
import { emitter } from './eventEmitter'

// we create our cache instance, which allows calling all methods on it
const redis = new Redis('rediss://:[e-mail]:30652')

const cache = createRedisCache({ redis })

const getEnveloped = envelop({
  plugins: [
    useEngine({ parse, validate, specifiedRules, execute, subscribe }),
    // ... other plugins ...
    useResponseCache({
      ttl: 2000,
      // we pass the cache instance to the request.
      cache
    })
  ]
})

emitter.on('invalidate', resource => {
  cache.invalidate([
    {
      typename: resource.type,
      id: resource.id
    }
  ])
})