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mongo.go
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mongo.go
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package db
import (
"fmt"
"time"
"errors"
"github.com/globalsign/mgo"
log "github.com/sirupsen/logrus"
)
const (
localURL = "localhost:27017"
)
type MongoStorage struct {
logger log.FieldLogger
config MongoConfig
closed bool
db *mgo.Database
}
func (mongo *MongoStorage) Close() (err error) {
defer func() {
switch rec := recover().(type) {
case nil:
case error:
err = rec
case fmt.Stringer:
err = errors.New(rec.String())
default:
err = fmt.Errorf("%v", rec)
}
}()
if mongo.closed {
return fmt.Errorf("mongo stoarage already closed")
}
mongo.db.Session.Close()
mongo.db = nil
mongo.closed = true
return nil
}
func (mongo *MongoStorage) IsClosed() bool {
return mongo.closed
}
func NewMongo(config MongoConfig) (*MongoStorage, error) {
if config.Logger == nil {
var logger = log.StandardLogger()
if config.Debug {
logger.SetLevel(log.DebugLevel)
}
config.Logger = logger
}
if config.AppName == "" {
config.AppName = "events-api"
}
config.FailFast = true
config.Logger = config.Logger.WithField("app", config.AppName)
if config.Debug {
config.Logger.Debugf("running in debug mode")
}
config.Logger.Debugf("running mongo init")
if config.Timeout <= 0 {
config.Timeout = 10 * time.Second
}
config.Logger.Debugf("config timeout %v", config.Timeout)
if len(config.Addrs) == 0 {
config.Addrs = append(config.Addrs, localURL)
}
config.Logger.Debugf("addrs %v", config.Addrs)
session, err := mgo.DialWithInfo(&config.DialInfo)
if err != nil {
config.Logger.WithError(err).Errorf("unable to connect to mongo")
return nil, err
}
mgo.SetDebug(config.Debug)
var db = session.DB(config.Database)
if config.Username != "" || config.Password != "" {
if err := db.Login(config.Username, config.Password); err != nil {
return nil, err
}
}
var storage = &MongoStorage{
logger: config.Logger,
config: config,
db: db,
}
return storage, nil
}