Golang : How to check if a connection to database is still alive ?
Problem :
How to check if a connection to database is still alive ?
Solution :
Use DB.Ping function. For example :
package main
import (
"database/sql"
"fmt"
// without the underscore _, you will get imported but not
// used error message
_ "github.com/go-sql-driver/mysql"
"os"
)
func main() {
// connect to our database server with data source name
// data source name configuration has the following parameters :
// [username[:password]@][protocol[(address)]]/dbname[?param1=value1&...¶mN=valueN]
// example config :
// user:password@tcp(127.0.0.1:3306)/database
conn, err := sql.Open("mysql", "db_username:db_password@protocol(address:port_num)/database_name")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
err = conn.Ping()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
// if no error. Ping is successful
fmt.Println("Ping to database successful, connection is still alive")
conn.Close()
// this part should fail
err = conn.Ping()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
// if no error. Ping is successful
fmt.Println("Ping to database successful, connection is still alive")
}
Output :
Ping to database successful, connection is still alive
sql: database is closed
exit status 1
References :
See also : Golang : Connect to database (MySQL/MariaDB) server
By Adam Ng
IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.
Advertisement
Tutorials
+36.8k Golang : Save image to PNG, JPEG or GIF format.
+3.8k Java : Random alphabets, alpha-numeric or numbers only string generator
+18.4k Golang : Get path name to current directory or folder
+7.2k Golang : Array mapping with Interface
+19.4k Golang : Check if directory exist and create if does not exist
+29.6k Golang : Login(Authenticate) with Facebook example
+6k Cash Flow : 50 days to pay your credit card debt
+10.1k Golang : Get escape characters \u form from unicode characters
+8.2k Golang : Get all countries phone codes
+11.6k CodeIgniter : Import Linkedin data
+15.4k Golang : How to get Unix file descriptor for console and file