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package common
import (
"database/sql"
"errors"
"fmt"
"strings"
"sync"
"time"
)
var (
// DbMap 存放数据库连接的map
DbMap *SafeMap
)
// SafeMap 并发安全
type SafeMap struct {
Db map[string]*sql.DB
mu sync.RWMutex
}
// NewSafeMap 创建并发安全的map
func NewSafeMap() *SafeMap {
if DbMap == nil {
DbMap = &SafeMap{
Db: make(map[string]*sql.DB, 0),
}
}
return DbMap
}
// GetOrStore 获取value 如果没有则放入map中 再进行获取
func (s *SafeMap) GetOrStore(key string) (*sql.DB, error) {
s.mu.Lock()
defer s.mu.Unlock()
db, ok := s.Db[key]
if ok {
// err := db.Ping()
if err != nil {
return nil, err
}
return db, nil
}
db, err = newDBConn(key)
if err != nil {
return nil, err
}
// db.SetConnMaxLifetime()
s.Db[key] = db
return db, nil
}
// Store 往map中放入数据
func (s *SafeMap) Store(key string) error {
s.mu.Lock()
defer s.mu.Unlock()
db, err := newDBConn(key)
if err != nil {
return err
}
s.Db[key] = db
return nil
}
func newDBConn(s string) (*sql.DB, error) {
chainCode := strings.ToLower(s)
if chainCode == "" {
return nil, err
}
// if len(chainCode[:1]) != 1 {
// return nil, err
// }
// word := chainCode[:1]
// i ~ z
// if word > "h" {
// db, err := sql.Open("mysql", fmt.Sprintf(`root_dbc:dbc_root888888@tcp(rm-2ze095l91j14r251wno.mysql.rds.aliyuncs.com:3306)/dbc_%s?charset=utf8`,
// chainCode))
// if err != nil {
// return nil, err
// }
// db.SetConnMaxLifetime(10 * time.Minute)
// err = db.Ping()
// return db, err
// }
// db, err := sql.Open("mysql", fmt.Sprintf(`root_dbc:dbc_root888888@tcp(rm-2ze8jnj44l6ta299pro.mysql.rds.aliyuncs.com:3306)/dbc_%s?charset=utf8`,
// chainCode))
// if err != nil {
// return nil, err
// }
// db.SetConnMaxLifetime(10 * time.Minute)
// err = db.Ping()
// return db, err
if strings.ToLower(chainCode)[0] >= '0' && strings.ToLower(chainCode)[0] <= '8' {
db, err := sql.Open("mysql", fmt.Sprintf(`root_dbc:dbc_root888888@tcp(rm-2zej0q2rx321k0h1pbo.mysql.rds.aliyuncs.com:3306)/dbc_%s?charset=utf8`,
chainCode))
if err != nil {
return nil, err
}
db.SetConnMaxLifetime(10 * time.Minute)
err = db.Ping()
if err != nil {
return nil, err
}
return db, err
} else if strings.ToLower(chainCode)[0] >= '9' && strings.ToLower(chainCode)[0] <= 'h' {
db, err := sql.Open("mysql", fmt.Sprintf(`root_dbc:dbc_root888888@tcp(rm-2ze4xxt6w2959o0ftyo.mysql.rds.aliyuncs.com:3306)/dbc_%s?charset=utf8`,
chainCode))
if err != nil {
return nil, err
}
db.SetConnMaxLifetime(10 * time.Minute)
err = db.Ping()
if err != nil {
return nil, err
}
return db, err
} else if strings.ToLower(chainCode)[0] >= 'i' && strings.ToLower(chainCode)[0] <= 'q' {
db, err := sql.Open("mysql", fmt.Sprintf(`root_dbc:dbc_root888888@tcp(rm-2ze095l91j14r251wno.mysql.rds.aliyuncs.com:3306)/dbc_%s?charset=utf8`,
chainCode))
if err != nil {
return nil, err
}
db.SetConnMaxLifetime(10 * time.Minute)
err = db.Ping()
if err != nil {
return nil, err
}
return db, err
} else if strings.ToLower(chainCode)[0] >= 'r' && strings.ToLower(chainCode)[0] <= 'z' {
db, err := sql.Open("mysql", fmt.Sprintf(`root_dbc:dbc_root888888@tcp(rm-2zeg6r1nvfk968lixyo.mysql.rds.aliyuncs.com:3306)/dbc_%s?charset=utf8`,
chainCode))
if err != nil {
return nil, err
}
db.SetConnMaxLifetime(10 * time.Minute)
err = db.Ping()
if err != nil {
return nil, err
}
return db, err
} else {
return nil, errors.New("find error chain code")
}
}