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
+25.4k Golang : Calculate future date with time.Add() function
+8.2k Golang : Write multiple lines or divide string into multiple lines
+9.5k Generate Random number with math/rand in Go
+17.1k Golang : Aligning strings to right, left and center with fill example
+9.2k Golang : Compare files modify date example
+7.7k Python : Fix SyntaxError: Non-ASCII character in file, but no encoding declared
+28.3k Golang : missing Git command
+11.5k Golang : Forwarding a local port to a remote server example
+6.9k Golang : Test if an input is an Armstrong number example
+12.1k Golang : Skip blank/empty lines in CSV file and trim whitespaces example
+10.6k Golang : How to flush a channel before the end of program?
+9.3k Golang : Read file and convert content to string