What is better: global pointer to mongo database or create new connection when needed

[Luke]

Can somebody help me to decide which solution is better:

1. Have one global pointer to the database that is created on init(), e.g. 

var GlobalMongoDB *mgo.Database

func NewConnection(MY_HOST, MY_DB, USER, PASS) {
	session, _ := mgo.Dial(MY_HOST)
	session.SetMode(mgo.Monotonic, true)
	db := session.DB(MY_DB)
	db.Login(USER, PASS)
	return db
}

func init() {

   GlobalMongoDB = NewConnection(MY_HOST, MY_DB, USER, PASS)

}

2. Call NewConnection every time I need connection the the database

[Gustavo Niemeyer]

Definitely don't reconnect every time. That undoes many of the benefits the driver buys you.

The actual best is to do the usual thing: make sure functions and values get the context they need to do their proper work. No globals.

Of course, unless you're writing a 20 lines hack. In which case, anything will do. 

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gustavo @ http://niemeyer.net

[Luke]

makes sense, thank you