Persist an InMemory Repository

warning

This is only recommended while prototyping and to run local demos not for production use.

Persist Repository

main.go

package main

import (
	"context"
	"os"

	"github.com/brianvoe/gofakeit/v6"
	"github.com/google/uuid"

	"github.com/go-arrower/arrower/repository"
)

type (
	EntityID string

	Entity struct {
		ID   EntityID
		Name string
	}
)

func main() {
	dir := os.TempDir()

	store := repository.NewJSONStore(dir)
	repo := repository.NewMemoryRepository[Entity, EntityID](
		repository.WithStore(store),
		repository.WithStoreFilename("Entity.json"), // optional, defaults to struct name + `.json`
	)

	err := repo.Save(context.Background(), Entity{
		ID:   EntityID(uuid.New().String()),
		Name: gofakeit.Name(),
	})
	if err != nil {
		panic(err)
	}
}

Check filesystem

cat /tmp/Entity.json

Content

{
        "5eda35ed-544e-4d94-8981-97ceb866d4b6": {
                "ID": "5eda35ed-544e-4d94-8981-97ceb866d4b6",
                "Name": "Rosie Dickens"
        }
}                                                                                               

Restore Repository Data

main.go

package main

import (
	"context"
	"fmt"
	"os"

	"github.com/go-arrower/arrower/repository"
)

type (
	EntityID string

	Entity struct {
		ID   EntityID
		Name string
	}
)

func main() {
	dir := os.TempDir()

	store := repository.NewJSONStore(dir)
	repo := repository.NewMemoryRepository[Entity, EntityID](repository.WithStore(store))

	entities, err := repo.All(context.Background())
	if err != nil {
		panic(err)
	}

	fmt.Println(entities)
}

Output

[{5eda35ed-544e-4d94-8981-97ceb866d4b6 Rosie Dickens}]