Aren't you tired to be forced to write a different code for sqlite3 because you can't use it with multiple goroutines? I was. I disliked the constraints and changing my habits.
That's why comfylite3 exists! Just throw your queries at it and your sql will be executed*!
*: eventually!
go get -u github.com/davidroman0O/comfylite3
ComfyDB is using all the functions of sql.DB so you can use as drop-in replacement! It now uses retrypool under the hood for better reliability and concurrent operation handling.
// You want a default memory database
comfylite3.WithMemory()
// You want a default file database
comfylite3.WithPath("comfyName.db")
// Feeling adventurous? You can!
comfylite3.WithConnection("file:/tmp/adventurousComfy.db?cache=shared")comfy, err := comfylite3.New(
comfylite3.WithMemory(),
comfylite3.WithRetryAttempts(3), // Configure max retries
comfylite3.WithRetryDelay(time.Second), // Set delay between retries
comfylite3.WithPanicHandler(func(v interface{}, stackTrace string) {
// Custom panic handling
}),
)ComfyLite3 now provides an OpenDB function that allows you to use ComfyDB as a standard sql.DB instance. This makes it easier to integrate ComfyLite3 with existing code or libraries that expect a *sql.DB.
// Create a new ComfyDB instance
comfy, err := comfylite3.New(comfylite3.WithMemory())
if err != nil {
panic(err)
}
// Open a standard sql.DB instance using ComfyDB
db := comfylite3.OpenDB(comfy,
comfylite3.WithOption("_fk=1"),
comfylite3.WithForeignKeys(),
)
// Now you can use db as a regular *sql.DB
rows, err := db.Query("SELECT * FROM users")
// ...
// Don't forget to close both when you're done
defer db.Close()
defer comfy.Close()This feature makes ComfyLite3 more flexible and easier to use in a variety of scenarios, especially when working with existing codebases or third-party libraries.
Very simplistic API, comfylite3 manage when to execute and you do as usual.
// Create a new comfy database for `sqlite3`
comfyDB, _ := comfylite3.New(comfylite3.WithMemory())
// Create future workload to cook
id := comfyDB.New(func(db *sql.DB) (interface{}, error) {
_, err := db.Exec("CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)")
return nil, err
})
// You will get what you send back! Error or not!
result := <-comfyDB.WaitForChn(id)
switch result.(type) {
case error:
fmt.Println("Oooh your query failed!", result)
}It can comes handy to integrate with other third-party like ent, a powerful entity framework for Go. Here's how you can use ComfyLite3 as the underlying database for your ent client:
import (
"context"
"log"
"github.com/davidroman0O/comfylite3"
"entgo.io/ent"
"entgo.io/ent/dialect"
"entgo.io/ent/dialect/sql"
)
func main() {
// Create a new ComfyDB instance
comfy, err := comfylite3.New(
comfylite3.WithPath("./ent.db"),
)
if err != nil {
log.Fatalf("failed creating ComfyDB: %v", err)
}
defer comfy.Close()
// Use the OpenDB function to create a sql.DB instance with SQLite options
db := comfylite3.OpenDB(
comfy,
comfylite3.WithOption("_fk=1"),
comfylite3.WithOption("cache=shared"),
comfylite3.WithOption("mode=rwc"),
comfylite3.WithForeignKeys(),
)
// Create a new ent client
client := ent.NewClient(ent.Driver(sql.OpenDB(dialect.SQLite, db)))
defer client.Close()
ctx := context.Background()
// Run the auto migration tool
if err := client.Schema.Create(ctx); err != nil {
log.Fatalf("failed creating schema resources: %v", err)
}
// Your ent operations go here
// For example:
// user, err := client.User.Create().SetName("John Doe").Save(ctx)
// if err != nil {
// log.Fatalf("failed creating user: %v", err)
// }
// fmt.Printf("User created: %v\n", user)
}This integration allows you to leverage the concurrency benefits of ComfyLite3 while using ent's powerful ORM features. Check by yourself that repository
Migrations is important and sqlite is a specific type of database, and it support migrations!
// Let's imagine a set of migrations
var memoryMigrations []comfylite3.Migration = []comfylite3.Migration{
comfylite3.NewMigration(
1,
"genesis",
func(tx *sql.Tx) error {
if _, err := tx.Exec("CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)"); err != nil {
return err
}
if _, err := tx.Exec("CREATE TABLE products (id INTEGER PRIMARY KEY, name TEXT, user_id INTEGER, FOREIGN KEY(user_id) REFERENCES users(id))"); err != nil {
return err
}
return nil
},
func(tx *sql.Tx) error {
// undo previous up function
if _, err := tx.Exec("DROP TABLE users"); err != nil {
return err
}
if _, err := tx.Exec("DROP TABLE products"); err != nil {
return err
}
return nil
}),
comfylite3.NewMigration(
2,
"new_table",
func(tx *sql.Tx) error {
if _, err := tx.Exec("ALTER TABLE products ADD COLUMN new_column TEXT"); err != nil {
return err
}
if _, err := tx.Exec("CREATE TABLE new_table (id INTEGER PRIMARY KEY, name TEXT)"); err != nil {
return err
}
return nil
},
func(tx *sql.Tx) error {
// undo previous up function
if _, err := tx.Exec("ALTER TABLE products DROP COLUMN new_column"); err != nil {
return err
}
if _, err := tx.Exec("DROP TABLE new_table"); err != nil {
return err
}
return nil
}),
comfylite3.NewMigration(
3,
"new_random",
func(tx *sql.Tx) error {
// remove new_column from products
if _, err := tx.Exec("ALTER TABLE products DROP COLUMN new_column"); err != nil {
return err
}
return nil
},
func(tx *sql.Tx) error {
// add new_column to products
if _, err := tx.Exec("ALTER TABLE products ADD COLUMN new_column TEXT"); err != nil {
return err
}
return nil
},
),
}
// create and add your migrations
comfyDB, _ := comfylite3.New(
comfylite3.WithMemory(),
comfylite3.WithMigration(memoryMigrations...),
comfylite3.WithMigrationTableName("_migrations"), // even customize your migration table!
)
// Migrations Up and Down are easy
// Up to the top!
if err := comfyDB.Up(context.Background()); err != nil {
panic(err)
}
// Specify how many down you want to do
if err := comfyDB.Down(context.Background(), 1); err != nil {
panic(err)
}
comfyDB.Version() // return all the existing versions []uint
comfyDB.Index() // return the current index of the migration
comfyDB.ShowTables() // return all table names
comfyDB.ShowColumns("name") // return columns data of one tableHere's a more complex example that computes the average amount of inserts per second:
func main() {
var superComfy *comfylite3.ComfyDB
var err error
if superComfy, err = comfylite3.New(comfylite3.WithMemory()); err != nil {
panic(err)
}
ticket := superComfy.New(func(db *sql.DB) (interface{}, error) {
_, err := db.Exec("CREATE TABLE users (id INTEGER PRIMARY KEY, name TEXT)")
return nil, err
})
<-superComfy.WaitForChn(ticket)
done := make(chan struct{})
go func() {
random := rand.New(rand.NewSource(time.Now().UnixNano()))
for range 10000 {
ticket := superComfy.New(func(db *sql.DB) (interface{}, error) {
_, err := db.Exec("INSERT INTO users (name) VALUES (?)", fmt.Sprintf("user%d", 1))
return nil, err
})
<-superComfy.WaitForChn(ticket)
// simulate random insert with a random sleep
time.Sleep(time.Duration(random.Intn(5)) * time.Millisecond)
}
done <- struct{}{}
}()
// Let's measure how many records per second
metrics := []int{}
ticker := time.NewTicker(1 * time.Second)
ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
defer cancel()
compute := true
for compute {
select {
case <-done:
ticker.Stop()
cancel()
compute = false
case <-ctx.Done():
ticker.Stop()
cancel()
compute = false
case <-ticker.C:
ticket := superComfy.New(func(db *sql.DB) (interface{}, error) {
rows, err := db.Query("SELECT COUNT(*) FROM users")
if err != nil {
return nil, err
}
defer rows.Close()
var count int
if rows.Next() {
err = rows.Scan(&count)
if err != nil {
return nil, err
}
}
return count, err
})
result := <-superComfy.WaitForChn(ticket)
metrics = append(metrics, result.(int))
}
}
total := 0
for _, value := range metrics {
total += value
}
average := float64(total) / float64(len(metrics))
fmt.Printf("Average: %.2f\n", average)
}Enjoy freeing yourself from database is locked!