Sharing a globally defined db conn with multiple packages

Question

I\'ve read a few StackOverflow answers on how we handling the db connection. Since it\'s a pool, we can define it globally and use it in multiple goroutines and it\'s safe.

Answer 1

There is also the option of creating another package to hold your database connection-related settings. It can then have a package level global, which can be initialized in main and used in any package that is importing it.

This way, you can explicitly see that the database package is being imported. Here is some sample code.

package database

var (
    // DBCon is the connection handle
    // for the database
    DBCon *sql.DB
)

---

package main

import "myApp/database"

func main() {

    var err error
    database.DBCon, err = sql.Open("postgres", "user=myname dbname=dbname sslmode=disable")

}

---

package user

import "myApp/database"

func Index() {
    // database handle is available here
    database.DBCon

    ...
}