Initial version

.github/workflows/main.yml

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+name: Go
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+permissions:
+  contents: write
+
+jobs:
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    strategy:
+      max-parallel: 1
+      matrix:
+        go-version: ['1.18', '1.19', '1.20', '1.21', '1.22']
+    steps:
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 10
+
+    - name: Set up Go
+      uses: actions/setup-go@v5
+      with:
+        go-version: ${{ matrix.go-version }}
+      id: go
+
+    - name: Get dependencies
+      run: go get -v -t -d ./...
+
+    - uses: gwatts/go-coverage-action@v2
+      id: coverage
+      with:
+        # Optional coverage threshold
+        # use fail-coverage to determine what should happen below this threshold
+        coverage-threshold: 100
+
+        # collect coverage for all packages beyond the one under test
+        cover-pkg: ./...

README.md

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+# KVSync
+
+KVSync is a Go package that provides a simple and efficient way to synchronize your GORM models with a key-value store.
+
+There can be multiple key definitions for each model. For example, you can have a key for fetching by ID, a key for fetching by UUID, and a composite key for fetching by both ID and UUID. For each key, the model data is replicated accordingly to the key-value store.
+
+## Installation
+
+To install KVSync, use the `go get` command:
+
+```bash
+go get github.com/ndthuan/kvsync
+```
+
+## Sync Setup
+
+### Define Synced Models
+
+Implement `kvsync.Syncable` and provide sync keys mapped by a name for fetching later. Each key is unique on the key-value store.
+
+```go
+type SyncedUser struct {
+	gorm.Model
+	UUID     string
+	Username string
+}
+
+func (u SyncedUser) SyncKeys() map[string]string {
+	return map[string]string{
+		"id":        fmt.Sprintf("user:id:%d", u.ID),
+		"uuid":      fmt.Sprintf("user:uuid:%s", u.UUID),
+		"composite": fmt.Sprintf("user:composite:%d_%s", u.ID, u.UUID),
+	}
+}
+
+```
+
+### Configure Key-Value Store
+
+With Redis for example, you can use the provided `RedisStore`. Steps:
+- Init GORM DB instance
+- Init Redis client
+- Create a new `RedisStore` instance
+- Create a new `KVSync` instance
+- Register GORM callbacks
+
+```go
+package main
+
+import (
+	"context"
+	"fmt"
+	"github.com/ndthuan/kvsync"
+	"github.com/redis/go-redis/v9"
+	"gorm.io/gorm"
+	"time"
+)
+
+func main() {
+	db, err := gorm.Open(...)
+	if err != nil {
+		panic(fmt.Sprintf("Failed to connect to database: %v", err))
+	}
+
+	clusterClient := redis.NewClusterClient(&redis.ClusterOptions{
+		Addrs: []string{},
+	})
+
+	// Create a new RedisStore
+	store := &kvsync.RedisStore{
+		Client:     clusterClient,
+		Expiration: time.Hour * 24 * 365,               // Set the expiration time for the keys
+		Prefix:     "kvsync:",                          // Optional, defaults to "kvsync:"
+		Marshaler:  &kvsync.BSONMarshalingAdapter{},    // Optional, BSONMarshalingAdapter (using Mongo's BSON) is the default and recommended
+	}
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+
+	kvSync := kvsync.NewKVSync(ctx, kvsync.Options{
+		Store:   store,
+		Workers: 4,
+		ReportCallback: func(r kvsync.Report) {
+			if r.Err == nil {
+				actualDoneCount++
+			}
+		},
+	})
+
+	// Register the GORM callbacks for automated synchronization
+	db.Callback().Create().After("gorm:create").Register("kvsync:create", kvSync.GormCallback())
+	db.Callback().Update().After("gorm:update").Register("kvsync:update", kvSync.GormCallback())
+
+}
+```
+
+### And create/update your model as usual
+
+```go
+// Create a new SyncedUser
+db.Create(&SyncedUser{
+    UUID:     "test-uuid",
+    Username: "test-username",
+})
+// The SyncedUser is automatically synchronized with the key-value store
+```
+
+## Fetching Synced Models
+
+You can fetch the model by any of the keys you defined. You must provide a struct with non-zero values for the keys you want to fetch by.
+
+By ID
+```go
+user := SyncedUser{
+    Model: gorm.Model{ID: 1},
+}
+kvSync.Fetch(&user, "id")
+```
+
+By UUID
+```go
+user := SyncedUser{
+    UUID: "test-uuid",
+}
+kvSync.Fetch(&user, "uuid")
+```
+
+By composite key
+```go
+user := SyncedUser{
+    Model: gorm.Model{ID: 1},
+    UUID:  "test-uuid",
+}
+kvSync.Fetch(&user, "composite")
+```
+
+## License
+
+KVSync is licensed under the MIT License. See the [LICENSE](LICENSE) file for more information.

go.mod

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+module github.com/ndthuan/kvsync
+
+go 1.18
+
+require (
+	github.com/alicebob/miniredis/v2 v2.33.0
+	github.com/redis/go-redis/v9 v9.5.3
+	github.com/stretchr/testify v1.9.0
+	go.mongodb.org/mongo-driver v1.15.0
+	gorm.io/driver/sqlite v1.5.5
+	gorm.io/gorm v1.25.10
+)
+
+require (
+	github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
+	github.com/mattn/go-sqlite3 v1.14.17 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/yuin/gopher-lua v1.1.1 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+)

go.sum

@@ -0,0 +1,37 @@
+github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a h1:HbKu58rmZpUGpz5+4FfNmIU+FmZg2P3Xaj2v2bfNWmk=
+github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a/go.mod h1:SGnFV6hVsYE877CKEZ6tDNTjaSXYUk6QqoIK6PrAtcc=
+github.com/alicebob/miniredis/v2 v2.33.0 h1:uvTF0EDeu9RLnUEG27Db5I68ESoIxTiXbNUiji6lZrA=
+github.com/alicebob/miniredis/v2 v2.33.0/go.mod h1:MhP4a3EU7aENRi9aO+tHfTBZicLqQevyi/DJpoj6mi0=
+github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
+github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
+github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
+github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
+github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
+github.com/google/go-cmp v0.5.2 h1:X2ev0eStA3AbceY54o37/0PQ/UWqKEiiO2dKL5OPaFM=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
+github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
+github.com/mattn/go-sqlite3 v1.14.17 h1:mCRHCLDUBXgpKAqIKsaAaAsrAlbkeomtRFKXh2L6YIM=
+github.com/mattn/go-sqlite3 v1.14.17/go.mod h1:2eHXhiwb8IkHr+BDWZGa96P6+rkvnG63S2DGjv9HUNg=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/redis/go-redis/v9 v9.5.3 h1:fOAp1/uJG+ZtcITgZOfYFmTKPE7n4Vclj1wZFgRciUU=
+github.com/redis/go-redis/v9 v9.5.3/go.mod h1:hdY0cQFCN4fnSYT6TkisLufl/4W5UIXyv0b/CLO2V2M=
+github.com/stretchr/testify v1.9.0 h1:HtqpIVDClZ4nwg75+f6Lvsy/wHu+3BoSGCbBAcpTsTg=
+github.com/stretchr/testify v1.9.0/go.mod h1:r2ic/lqez/lEtzL7wO/rwa5dbSLXVDPFyf8C91i36aY=
+github.com/yuin/gopher-lua v1.1.1 h1:kYKnWBjvbNP4XLT3+bPEwAXJx262OhaHDWDVOPjL46M=
+github.com/yuin/gopher-lua v1.1.1/go.mod h1:GBR0iDaNXjAgGg9zfCvksxSRnQx76gclCIb7kdAd1Pw=
+go.mongodb.org/mongo-driver v1.15.0 h1:rJCKC8eEliewXjZGf0ddURtl7tTVy1TK3bfl0gkUSLc=
+go.mongodb.org/mongo-driver v1.15.0/go.mod h1:Vzb0Mk/pa7e6cWw85R4F/endUC3u0U9jGcNU603k65c=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gorm.io/driver/sqlite v1.5.5 h1:7MDMtUZhV065SilG62E0MquljeArQZNfJnjd9i9gx3E=
+gorm.io/driver/sqlite v1.5.5/go.mod h1:6NgQ7sQWAIFsPrJJl1lSNSu2TABh0ZZ/zm5fosATavE=
+gorm.io/gorm v1.25.10 h1:dQpO+33KalOA+aFYGlK+EfxcI5MbO7EP2yYygwh9h+s=
+gorm.io/gorm v1.25.10/go.mod h1:hbnx/Oo0ChWMn1BIhpy1oYozzpM15i4YPuHDmfYtwg8=