SimpleCloudNotifier/scnserver/db/impl/primary/database.go

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package primary
import (
server "blackforestbytes.com/simplecloudnotifier"
"blackforestbytes.com/simplecloudnotifier/db/dbtools"
"blackforestbytes.com/simplecloudnotifier/db/impl/primary/schema"
"context"
"database/sql"
"errors"
"fmt"
"github.com/jmoiron/sqlx"
_ "github.com/mattn/go-sqlite3"
"gogs.mikescher.com/BlackForestBytes/goext/langext"
"gogs.mikescher.com/BlackForestBytes/goext/sq"
"time"
)
type Database struct {
db sq.DB
pp *dbtools.DBPreprocessor
wal bool
}
func NewPrimaryDatabase(cfg server.Config) (*Database, error) {
conf := cfg.DBMain
url := fmt.Sprintf("file:%s?_journal=%s&_timeout=%d&_fk=%s&_busy_timeout=%d", conf.File, conf.Journal, conf.Timeout.Milliseconds(), langext.FormatBool(conf.CheckForeignKeys, "true", "false"), conf.BusyTimeout.Milliseconds())
xdb, err := sqlx.Open("sqlite3", url)
if err != nil {
return nil, err
}
if conf.SingleConn {
xdb.SetMaxOpenConns(1)
} else {
xdb.SetMaxOpenConns(5)
xdb.SetMaxIdleConns(5)
xdb.SetConnMaxLifetime(60 * time.Minute)
xdb.SetConnMaxIdleTime(60 * time.Minute)
}
qqdb := sq.NewDB(xdb)
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if conf.EnableLogger {
qqdb.AddListener(dbtools.DBLogger{})
}
pp, err := dbtools.NewDBPreprocessor(qqdb)
if err != nil {
return nil, err
}
qqdb.AddListener(pp)
scndb := &Database{db: qqdb, pp: pp, wal: conf.Journal == "WAL"}
return scndb, nil
}
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func (db *Database) DB() sq.DB {
return db.db
}
func (db *Database) Migrate(ctx context.Context) error {
ctx, cancel := context.WithTimeout(context.Background(), 24*time.Second)
defer cancel()
currschema, err := db.ReadSchema(ctx)
if currschema == 0 {
_, err = db.db.Exec(ctx, schema.PrimarySchema3, sq.PP{})
if err != nil {
return err
}
err = db.WriteMetaInt(ctx, "schema", 3)
if err != nil {
return err
}
err = db.pp.Init(ctx)
if err != nil {
return err
}
return nil
} else if currschema == 1 {
return errors.New("cannot autom. upgrade schema 1")
} else if currschema == 2 {
return errors.New("cannot autom. upgrade schema 2") //TODO
} else if currschema == 3 {
return nil // current
} else {
return errors.New(fmt.Sprintf("Unknown DB schema: %d", currschema))
}
}
func (db *Database) Ping(ctx context.Context) error {
return db.db.Ping(ctx)
}
func (db *Database) BeginTx(ctx context.Context) (sq.Tx, error) {
return db.db.BeginTransaction(ctx, sql.LevelDefault)
}
func (db *Database) Stop(ctx context.Context) error {
if db.wal {
_, err := db.db.Exec(ctx, "PRAGMA wal_checkpoint;", sq.PP{})
if err != nil {
return err
}
}
err := db.db.Exit()
if err != nil {
return err
}
return nil
}