11 replies

How to cache Layers?

I'm starting to build a nextjs app and a lot of my logic is built using effect, what would be the best way to handle call effect from nextjs?

right now my good looks like this, which works perfectly except every call to

feature1()

feature1()

results in a new database connection being created, i'd like to create a layer and reuse it across multiple effects, if that makes sense.

// db.ts
class DBService {  }

export const DBServiceLive = Layer.effect(
  DBService,
  CreateDBServiceEffect, // creates a database connection and initial value
);


// lib/actions

const defaultLayer = Layer.provideMerge(DBServiceLive, ...)

// lib/feature1

"use server";

export const feature1 = () => {
  // creates a new database connection on every invocation 
  const program = getFeature1().pipe(Effect.provide(defaultLayer)) 

  return Effect.runPromise(program)
}

// db.ts
class DBService {  }

export const DBServiceLive = Layer.effect(
  DBService,
  CreateDBServiceEffect, // creates a database connection and initial value
);


// lib/actions

const defaultLayer = Layer.provideMerge(DBServiceLive, ...)

// lib/feature1

"use server";

export const feature1 = () => {
  // creates a new database connection on every invocation 
  const program = getFeature1().pipe(Effect.provide(defaultLayer)) 

  return Effect.runPromise(program)
}

Effect Community•2y ago•

11 replies

amr

How to cache Layers?

feature1()

feature1()

results in a new database connection being created, i'd like to create a layer and reuse it across multiple effects, if that makes sense.

// db.ts
class DBService {  }

export const DBServiceLive = Layer.effect(
  DBService,
  CreateDBServiceEffect, // creates a database connection and initial value
);


// lib/actions

const defaultLayer = Layer.provideMerge(DBServiceLive, ...)

// lib/feature1

"use server";

export const feature1 = () => {
  // creates a new database connection on every invocation 
  const program = getFeature1().pipe(Effect.provide(defaultLayer)) 

  return Effect.runPromise(program)
}

// db.ts
class DBService {  }

export const DBServiceLive = Layer.effect(
  DBService,
  CreateDBServiceEffect, // creates a database connection and initial value
);


// lib/actions

const defaultLayer = Layer.provideMerge(DBServiceLive, ...)

// lib/feature1

"use server";

export const feature1 = () => {
  // creates a new database connection on every invocation 
  const program = getFeature1().pipe(Effect.provide(defaultLayer)) 

  return Effect.runPromise(program)
}

How to cache Layers?

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