I've written a simple MongoDB package with some CRUD methods:
package backend
import "labix.org/v2/mgo"
type MongoDBConn struct {
session *mgo.Session
}
type ToDo struct {
Title string
Description string
}
func NewMongoDBConn() *MongoDBConn {
return &MongoDBConn{}
}
func (m *MongoDBConn) Connect(url string) *mgo.Session {
session, err := mgo.Dial(url)
if err != nil {
panic(err)
}
m.session = session
return m.session
}
func (m *MongoDBConn) Stop() {
m.session.Close()
}
func (m *MongoDBConn) AddToDo(title, description string) (err error) {
c := m.session.DB("test").C("people")
err = c.Insert(&ToDo{title, description})
if err != nil {
panic(err)
}
return nil
}
I have a server.go where I create a Http Server and have handlers for the different URLs. I'd like to be able to connect to MongoDB and call the AddToDo method within a specific handler. I can connect to the DB from the main method of my server:
import (
"./backend"
//other boilerplate imports
)
func AddHandler(writer http.ResponseWriter, request *http.Request) {
log.Printf("serving %v %v", request.Method, request.URL.Path[1:])
if request.Method != "POST" {
serve404(writer)
return
}
title := request.FormValue("title")
description := request.FormValue("description")
fmt.Fprintf(writer, " title description %v %v", title, description)
//I can't call mongoConn.AddToDo(title, description) from here
}
func main() {
//connect to mongoDB
mongoConn := backend.NewMongoDBConn()
_ = mongoConn.Connect("localhost")
defer mongoConn.Stop()
}
But I'm not sure how to call mongoConn.AddToDo(title, description string) method from the handler. Should I create a global db connection variable?