Simple controller backed up with MongoDB support.

AppCtrl.go

package controllers

import (
	"github.com/revel/revel"
	"gopkg.in/mgo.v2"
)

type AppCtrl struct {
	*revel.Controller
	mongoSession  *mgo.Session
	mongoDatabase *mgo.Database
}

func (ctrl AppCtrl) GetMongoSession() *mgo.Session {
	if ctrl.mongoSession == nil {
		host := revel.Config.StringDefault("mongo.host", "localhost")
		port := revel.Config.StringDefault("mongo.port", "27017")
		var err error
		ctrl.mongoSession, err = mgo.Dial(host + ":" + port)
		if err != nil {
			panic(err)
		}
	}

	return ctrl.mongoSession
}

func (ctrl AppCtrl) GetMongoDatabase() *mgo.Database {
	session := ctrl.GetMongoSession()
	databaseName := revel.Config.StringDefault("mongo.database", "")
	return session.DB(databaseName)
}

func (ctrl AppCtrl) GetMongoCollection(collectionName string) *mgo.Collection {
	return ctrl.GetMongoDatabase().C(collectionName)
}

func (ctrl AppCtrl) CloseMongoSession() {
	ctrl.GetMongoSession().Close()
}