/
rdbms.go
112 lines (97 loc) · 3.2 KB
/
rdbms.go
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package connector
import (
"database/sql"
"github.com/shing1211/go-lib/config"
log "github.com/sirupsen/logrus"
"gorm.io/driver/mysql"
"gorm.io/driver/postgres"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
"gorm.io/gorm/logger"
"gorm.io/gorm/schema"
)
// DB global variable to access gorm
var DB *gorm.DB
var sqlDB *sql.DB
var err error
// GetRdbmsDB - get a connection
func GetRdbmsDB() *gorm.DB {
return DB
}
// InitRdbmsDB - function to initialize db
func InitRdbmsDB(config config.RDBMSConfig) *gorm.DB {
var db = DB
driver := config.RdbmsDbDriver
username := config.RdbmsDbUser
password := config.RdbmsDbPassword
database := config.RdbmsDbName
host := config.RdbmsDbHost
port := config.RdbmsDbPort
sslmode := config.RdbmsDbSslmode
timeZone := config.RdbmsDbTimeZone
maxIdleConns := config.RdbmsDbMaxIdleConns
maxOpenConns := config.RdbmsDbMaxOpenConns
connMaxLifetime := config.RdbmsDbConnMaxLifetime
logLevel := config.RdbmsDbLogLevel
switch driver {
case "mysql":
dsn := username + ":" + password + "@tcp(" + host + ":" + port + ")/" + database + "?charset=utf8mb4&parseTime=True&loc=Local"
sqlDB, err = sql.Open(driver, dsn)
if err != nil {
log.WithError(err).Panic("panic code: 151")
}
sqlDB.SetMaxIdleConns(maxIdleConns) // max number of connections in the idle connection pool
sqlDB.SetMaxOpenConns(maxOpenConns) // max number of open connections in the database
sqlDB.SetConnMaxLifetime(connMaxLifetime) // max amount of time a connection may be reused
db, err = gorm.Open(mysql.New(mysql.Config{
Conn: sqlDB,
}), &gorm.Config{
Logger: logger.Default.LogMode(logger.LogLevel(logLevel)),
NamingStrategy: schema.NamingStrategy{SingularTable: true},
})
if err != nil {
log.WithError(err).Panic("panic code: 152")
}
// Only for debugging
if err == nil {
log.Debug("Mysql/MariaDB connection successful!")
}
case "postgres":
dsn := "host=" + host + " port=" + port + " user=" + username + " dbname=" + database + " password=" + password + " sslmode=" + sslmode + " TimeZone=" + timeZone
sqlDB, err = sql.Open(driver, dsn)
if err != nil {
log.WithError(err).Panic("panic code: 153")
}
sqlDB.SetMaxIdleConns(maxIdleConns) // max number of connections in the idle connection pool
sqlDB.SetMaxOpenConns(maxOpenConns) // max number of open connections in the database
sqlDB.SetConnMaxLifetime(connMaxLifetime) // max amount of time a connection may be reused
db, err = gorm.Open(postgres.New(postgres.Config{
Conn: sqlDB,
}), &gorm.Config{
Logger: logger.Default.LogMode(logger.LogLevel(logLevel)),
})
if err != nil {
log.WithError(err).Panic("panic code: 154")
}
// Only for debugging
if err == nil {
log.Debug("DB connection successful!")
}
case "sqlite3":
db, err = gorm.Open(sqlite.Open(database), &gorm.Config{
Logger: logger.Default.LogMode(logger.Silent),
DisableForeignKeyConstraintWhenMigrating: true,
})
if err != nil {
log.WithError(err).Panic("panic code: 155")
}
// Only for debugging
if err == nil {
log.Debug("DB connection successful!")
}
default:
log.Fatal("The driver " + driver + " is not implemented yet")
}
DB = db
return DB
}