145 lines
3.8 KiB
Go
145 lines
3.8 KiB
Go
package database
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import (
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"context"
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"database/sql"
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"fmt"
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"runtime"
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"strconv"
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"git.adyxax.org/adyxax/tfstated/pkg/scrypto"
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)
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func initDB(ctx context.Context, url string) (*sql.DB, error) {
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db, err := sql.Open("sqlite3", url)
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if err != nil {
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return nil, fmt.Errorf("failed to open database: %w", err)
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}
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defer func() {
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if err != nil {
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_ = db.Close()
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}
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}()
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if _, err = db.ExecContext(ctx, "PRAGMA busy_timeout = 5000"); err != nil {
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return nil, fmt.Errorf("failed to set pragma: %w", err)
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}
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return db, nil
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}
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type DB struct {
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ctx context.Context
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dataEncryptionKey scrypto.AES256Key
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readDB *sql.DB
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versionsHistoryLimit int
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writeDB *sql.DB
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}
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func NewDB(ctx context.Context, url string, getenv func(string) string) (*DB, error) {
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readDB, err := initDB(ctx, url)
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if err != nil {
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return nil, fmt.Errorf("failed to init read database connection: %w", err)
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}
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defer func() {
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if err != nil {
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_ = readDB.Close()
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}
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}()
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readDB.SetMaxOpenConns(max(4, runtime.NumCPU()))
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writeDB, err := initDB(ctx, url)
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if err != nil {
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return nil, fmt.Errorf("failed to init write database connection: %w", err)
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}
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defer func() {
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if err != nil {
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_ = writeDB.Close()
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}
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}()
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writeDB.SetMaxOpenConns(1)
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db := DB{
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ctx: ctx,
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readDB: readDB,
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versionsHistoryLimit: 64,
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writeDB: writeDB,
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}
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pragmas := []struct {
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key string
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value string
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}{
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{"foreign_keys", "ON"},
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{"cache_size", "10000000"},
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{"journal_mode", "WAL"},
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{"synchronous", "NORMAL"},
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}
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for _, pragma := range pragmas {
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if _, err = db.Exec(fmt.Sprintf("PRAGMA %s = %s", pragma.key, pragma.value)); err != nil {
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return nil, fmt.Errorf("failed to set pragma: %w", err)
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}
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}
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if err = db.migrate(); err != nil {
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return nil, fmt.Errorf("failed to migrate: %w", err)
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}
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dataEncryptionKey := getenv("DATA_ENCRYPTION_KEY")
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if dataEncryptionKey == "" {
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return nil, fmt.Errorf("the DATA_ENCRYPTION_KEY environment variable is not set")
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}
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if err := db.dataEncryptionKey.FromBase64(dataEncryptionKey); err != nil {
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return nil, fmt.Errorf("failed to decode the DATA_ENCRYPTION_KEY environment variable, expected base64: %w", err)
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}
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versionsHistoryLimit := getenv("VERSIONS_HISTORY_LIMIT")
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if versionsHistoryLimit != "" {
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if db.versionsHistoryLimit, err = strconv.Atoi(versionsHistoryLimit); err != nil {
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return nil, fmt.Errorf("failed to parse the VERSIONS_HISTORY_LIMIT environment variable, expected an integer: %w", err)
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}
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}
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return &db, nil
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}
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func (db *DB) Close() error {
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if err := db.readDB.Close(); err != nil {
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_ = db.writeDB.Close()
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return fmt.Errorf("failed to close read database connection: %w", err)
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}
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if err := db.writeDB.Close(); err != nil {
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return fmt.Errorf("failed to close write database connection: %w", err)
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}
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return nil
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}
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func (db *DB) Exec(query string, args ...any) (sql.Result, error) {
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return db.writeDB.ExecContext(db.ctx, query, args...)
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}
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func (db *DB) Query(query string, args ...any) (*sql.Rows, error) {
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return db.readDB.QueryContext(db.ctx, query, args...)
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}
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func (db *DB) QueryRow(query string, args ...any) *sql.Row {
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return db.readDB.QueryRowContext(db.ctx, query, args...)
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}
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func (db *DB) WithTransaction(f func(tx *sql.Tx) error) error {
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tx, err := db.writeDB.Begin()
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if err != nil {
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return fmt.Errorf("failed to begin transaction: %w", err)
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}
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defer func() {
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if err != nil {
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if err2 := tx.Rollback(); err2 != nil {
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panic(fmt.Sprintf("failed to rollback transaction: %+v. Reason for rollback: %+v", err2, err))
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}
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}
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}()
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if err = f(tx); err != nil {
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return fmt.Errorf("failed to execute function inside transaction: %w", err)
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} else {
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if err = tx.Commit(); err != nil {
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err = fmt.Errorf("failed to commit transaction: %w", err)
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}
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}
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return err
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}
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