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sqliter.go
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sqliter.go
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package dbm
import (
"os"
"github.com/CyberMiles/travis/sdk/errors"
_ "github.com/mattn/go-sqlite3"
"database/sql"
"strings"
"github.com/ethereum/go-ethereum/log"
)
// SQLite helper functions
type sqliter struct{
dbPath string
db *sql.DB
}
var Sqliter = &sqliter{}
func InitSqliter(dbPath string) error {
if strings.Compare(dbPath, "") != 0 {
errors.ErrInternal("The sqlite database has been initialized.")
}
if err := initSqliteDB(dbPath); err != nil {
return err
}
Sqliter.dbPath = dbPath
return nil
}
func (s *sqliter) GetDB() (*sql.DB, error) {
if strings.Compare(s.dbPath, "") == 0 {
return nil, errors.ErrInternal("Sqlite database path is not set.")
}
if s.db != nil {
if s.db.Stats().OpenConnections > 0 {
return s.db, nil
}
}
db, err := sql.Open("sqlite3", s.dbPath)
if err != nil {
return nil, errors.ErrInternal("Open database: " + err.Error())
}
if db.Ping(); err != nil {
return nil, errors.ErrInternal("Open database: " + err.Error())
}
s.db = db
return db, nil
}
func (s *sqliter) CloseDB() {
if s.db != nil {
if err := s.db.Close(); err != nil {
log.Warn("Failed to close sqlite db: " + s.dbPath)
}
log.Info("Sqlite db closed successfully!")
s.db = nil
}
}
func initSqliteDB(dbPath string) error {
// dbPath does not exist
if _, err := os.Stat(dbPath); os.IsNotExist(err) {
if _, err := os.Create(dbPath); err != nil {
return err
}
}
return nil
}