Integrating MongoDB and Go

Whenever you want to persist data in a MongoDB database, the first step you have to take is to establish a connection between the database and your web application, which we will be covering in this recipe using one of the most famous and commonly used MongoDB drivers for Go - gopkg.in/mgo.v2.

Getting ready…

Verify whether MongoDB is installed and running locally on port 27017 by executing the following command:

$ mongo

This should return the following response:

How to do it…

1. Install the gopkg.in/mgo.v package, using the go get command, as follows:

$ go get gopkg.in/mgo.v

2. Create connect-mongodb.go. Then we connect to the MongoDB database, get all the database names from the cluster, and write them to an HTTP response stream, as follows:

package main
import 
(
  "fmt"
  "log"
  "net/http"
  "strings"
  mgo "gopkg.in/mgo.v2"
)
const 
(
  CONN_HOST = "localhost"
  CONN_PORT = "8080"
  MONGO_DB_URL = "127.0.0.1"
)
var session *mgo.Session
var connectionError error
func init...