sqlite.go•2.8 kB
// Copyright 2025 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package sqlite
import (
"context"
"database/sql"
"fmt"
"github.com/goccy/go-yaml"
"github.com/googleapis/genai-toolbox/internal/sources"
"go.opentelemetry.io/otel/trace"
_ "modernc.org/sqlite" // Pure Go SQLite driver
)
const SourceKind string = "sqlite"
// validate interface
var _ sources.SourceConfig = Config{}
func init() {
if !sources.Register(SourceKind, newConfig) {
panic(fmt.Sprintf("source kind %q already registered", SourceKind))
}
}
func newConfig(ctx context.Context, name string, decoder *yaml.Decoder) (sources.SourceConfig, error) {
actual := Config{Name: name}
if err := decoder.DecodeContext(ctx, &actual); err != nil {
return nil, err
}
return actual, nil
}
type Config struct {
Name string `yaml:"name" validate:"required"`
Kind string `yaml:"kind" validate:"required"`
Database string `yaml:"database" validate:"required"` // Path to SQLite database file
}
func (r Config) SourceConfigKind() string {
return SourceKind
}
func (r Config) Initialize(ctx context.Context, tracer trace.Tracer) (sources.Source, error) {
db, err := initSQLiteConnection(ctx, tracer, r.Name, r.Database)
if err != nil {
return nil, fmt.Errorf("unable to create db connection: %w", err)
}
err = db.PingContext(context.Background())
if err != nil {
return nil, fmt.Errorf("unable to connect successfully: %w", err)
}
s := &Source{
Name: r.Name,
Kind: SourceKind,
Db: db,
}
return s, nil
}
var _ sources.Source = &Source{}
type Source struct {
Name string `yaml:"name"`
Kind string `yaml:"kind"`
Db *sql.DB
}
func (s *Source) SourceKind() string {
return SourceKind
}
func (s *Source) SQLiteDB() *sql.DB {
return s.Db
}
func initSQLiteConnection(ctx context.Context, tracer trace.Tracer, name, dbPath string) (*sql.DB, error) {
//nolint:all // Reassigned ctx
ctx, span := sources.InitConnectionSpan(ctx, tracer, SourceKind, name)
defer span.End()
// Open database connection
db, err := sql.Open("sqlite", dbPath)
if err != nil {
return nil, fmt.Errorf("sql.Open: %w", err)
}
// Set some reasonable defaults for SQLite
db.SetMaxOpenConns(1) // SQLite only supports one writer at a time
db.SetMaxIdleConns(1)
return db, nil
}