How do I batch and cache resolvers with gqlgen in Go?

Batching and caching resolvers in gqlgen can improve the performance and efficiency of your GraphQL server. By reducing the number of database calls and leveraging cache, your application can serve requests faster.

Example of Batching with gqlgen


        // Define a DataLoader for batching the requests
        type UserLoader struct {
            loader *dataloader.Loader
        }

        func NewUserLoader() *UserLoader {
            return &UserLoader{
                loader: dataloader.NewBatchedLoader(batchFetchUsers),
            }
        }

        // Helper function to fetch users in batches
        func batchFetchUsers(keys dataloader.Keys) dataloader.Values {
            // Your database call here
            ...
        }

        // Example resolver using the DataLoader
        func (r *queryResolver) Users(ctx context.Context) ([]*model.User, error) {
            userLoader := ctx.Value("userLoader").(*UserLoader)
            // Use DataLoader to get users
            return userLoader.loader.LoadMany(keys)
        }

Example of Caching with gqlgen


        // Implementing a simple cache layer
        type Cache struct {
            store map[string]*model.User
        }

        func (c *Cache) Get(key string) (*model.User, bool) {
            user, found := c.store[key]
            return user, found
        }

        func (c *Cache) Set(key string, user *model.User) {
            c.store[key] = user
        }

        // Example resolver with caching
        func (r *queryResolver) User(ctx context.Context, id string) (*model.User, error) {
            cache := ctx.Value("cache").(*Cache)
            if user, found := cache.Get(id); found {
                return user, nil
            }

            // Fetch user from database if not found in cache
            user, err := r.fetchUserFromDB(id)
            if err != nil {
                return nil, err
            }
            cache.Set(id, user)
            return user, nil
        }

batching caching gqlgen Go GraphQL performance efficiency DataLoader database

How do I batch and cache resolvers with gqlgen in Go?

Example of Batching with gqlgen

Example of Caching with gqlgen

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How do I batch and cache resolvers with gqlgen in Go?

Example of Batching with gqlgen

Example of Caching with gqlgen

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Popular Topics

Recent Languages