forked from open-falcon-archive/scripts
/
sql.go
60 lines (50 loc) · 1.16 KB
/
sql.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
// Connect and execute patch
package sql
import (
dbsql "database/sql"
"fmt"
)
// Represents the connection information to database
type DatabaseConfig struct {
driverName string
dsn string
db *dbsql.DB
}
// Initialize a new configuration to database
// This function also tries to ping the database
func NewDatabaseConfig(driverName string, dsn string) (dbConfig *DatabaseConfig, err error) {
/**
* Opens the connection to database
*/
var openedDb *dbsql.DB
if openedDb, err = dbsql.Open(driverName, dsn)
err != nil {
return
}
if err = openedDb.Ping()
err != nil {
return
}
// :~)
dbConfig = &DatabaseConfig{
driverName: driverName,
dsn: dsn,
db: openedDb,
}
return
}
// Close the db resource hold by the DatabaseConfig
func (databaseConfig *DatabaseConfig) Close() error {
var oldDb = databaseConfig.db
databaseConfig.db = nil
return oldDb.Close()
}
// Execute a callback which accepts "database/sql.DB" object
func (databaseConfig *DatabaseConfig) Execute(
dbCallback func(db *dbsql.DB) error,
) (err error) {
if databaseConfig.db == nil {
return fmt.Errorf("Need open connection of database")
}
return dbCallback(databaseConfig.db)
}