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use mongo evenstore with replaced mongo driver to DB #29

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merged 2 commits into from
Jul 12, 2019
Merged

use mongo evenstore with replaced mongo driver to DB #29

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46bee6a
use mongo evenstore with replaced mongo driver to DB
jkralik Jul 12, 2019
bd3feb0
update Gopkg
jkralik Jul 12, 2019
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64 changes: 33 additions & 31 deletions cqrs/eventstore/mongodb/eventstore.go
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Original file line number Diff line number Diff line change
Expand Up @@ -21,8 +21,10 @@ import (
"math/rand"
"time"

"github.com/globalsign/mgo"
"github.com/globalsign/mgo/bson"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"go.mongodb.org/mongo-driver/mongo/readpref"

"github.com/go-ocf/cqrs/event"
"github.com/go-ocf/cqrs/eventstore"
Expand All @@ -39,17 +41,19 @@ func init() {

// EventStore implements an EventStore for MongoDB.
type EventStore struct {
es *cqrsMongodb.EventStore
session *mgo.Session
config Config
es *cqrsMongodb.EventStore
client *mongo.Client
config Config

uniqueIdIsInitialized uint64
}

type Config struct {
Host string `envconfig:"MONGO_HOST" default:localhost:27017"`
DatabaseName string `envconfig:"MONGO_DATABASE" default:"eventStore"`
BatchSize int `envconfig:"MONGO_BATCH_SIZE" default:"128"`
Host string `envconfig:"MONGO_HOST" default:localhost:27017"`
DatabaseName string `envconfig:"MONGO_DATABASE" default:"eventStore"`
BatchSize int `envconfig:"MONGO_BATCH_SIZE" default:"16"`
MaxPoolSize uint16 `envconfig:"MONGO_MAX_POOL_SIZE" default:"16"`
MaxConnIdleTime time.Duration `envconfig:"MONGO_MAX_CONN_IDLE_TIME" default:"240s"`
}

//String return string representation of Config
Expand All @@ -60,22 +64,26 @@ func (c Config) String() string {

//NewEventStore create a event store from configuration
func NewEventStore(config Config, goroutinePoolGo eventstore.GoroutinePoolGoFunc) (*EventStore, error) {
session, err := mgo.Dial(config.Host)
ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
defer cancel()

client, err := mongo.Connect(ctx, options.Client().ApplyURI("mongodb://"+config.Host).SetMaxPoolSize(config.MaxPoolSize).SetMaxConnIdleTime(config.MaxConnIdleTime))
if err != nil {
return nil, fmt.Errorf("cannot dial to DB: %v", err)
return nil, fmt.Errorf("could not dial database: %v", err)
}
err = client.Ping(ctx, readpref.Primary())
if err != nil {
return nil, fmt.Errorf("could not dial database: %v", err)
}

session.SetMode(mgo.Strong, true)
session.SetSafe(&mgo.Safe{W: 1})

es, err := cqrsMongodb.NewEventStoreWithSession(session, config.DatabaseName, "events", config.BatchSize, goroutinePoolGo, cqrsUtils.Marshal, cqrsUtils.Unmarshal, log.Debugf)
es, err := cqrsMongodb.NewEventStoreWithClient(ctx, client, config.DatabaseName, "events", config.BatchSize, goroutinePoolGo, cqrsUtils.Marshal, cqrsUtils.Unmarshal, log.Debugf)
if err != nil {
return nil, err
}
return &EventStore{
es: es,
session: session,
config: config,
es: es,
client: client,
config: config,
}, nil
}

Expand All @@ -98,13 +106,11 @@ func (s *EventStore) LoadFromSnapshot(ctx context.Context, queries []eventstore.
// Clear clears the event storage.
func (s *EventStore) Clear(ctx context.Context) error {
err1 := s.es.Clear(ctx)
sess := s.session.Copy()
defer sess.Close()
err2 := sess.DB(s.es.DBName()).C(instanceIdsCollection).DropCollection()
err2 := s.client.Database(s.es.DBName()).Collection(instanceIdsCollection).Drop(ctx)
if err1 != nil {
return fmt.Errorf("cannot clear events: %v", err1)
}
if err2 != nil && err2 != mgo.ErrNotFound {
if err2 != nil && err2 != mongo.ErrNoDocuments {
return fmt.Errorf("cannot clear sequence number: %v", err2)
}
return nil
Expand All @@ -117,8 +123,6 @@ type seqRecord struct {

// GetInstanceId returns int64 that is unique
func (s *EventStore) GetInstanceId(ctx context.Context, aggregateId string) (int64, error) {
sess := s.session.Copy()
defer sess.Close()
var newInstanceId uint32
for {
newInstanceId = rand.Uint32()
Expand All @@ -128,8 +132,8 @@ func (s *EventStore) GetInstanceId(ctx context.Context, aggregateId string) (int
InstanceId: int64(newInstanceId),
}

if err := sess.DB(s.es.DBName()).C(instanceIdsCollection).Insert(r); err != nil {
if mgo.IsDup(err) {
if _, err := s.client.Database(s.es.DBName()).Collection(instanceIdsCollection).InsertOne(ctx, r); err != nil {
if cqrsMongodb.IsDup(err) {
rand.Seed(time.Now().UTC().UnixNano())
} else {
return -1, fmt.Errorf("cannot generate instance id: %v", err)
Expand All @@ -143,15 +147,13 @@ func (s *EventStore) GetInstanceId(ctx context.Context, aggregateId string) (int
}

func (s *EventStore) RemoveInstanceId(ctx context.Context, instanceId int64) error {
sess := s.session.Copy()
defer sess.Close()
if err := sess.DB(s.es.DBName()).C(instanceIdsCollection).Remove(bson.M{"_id": instanceId}); err != nil {
return fmt.Errorf("cannot removce instance id: %v", err)
if _, err := s.client.Database(s.es.DBName()).Collection(instanceIdsCollection).DeleteOne(ctx, bson.M{"_id": instanceId}); err != nil {
return fmt.Errorf("cannot remove instance id: %v", err)
}
return nil
}

// Close closes the database session.
func (s *EventStore) Close() {
s.es.Close()
func (s *EventStore) Close(ctx context.Context) error {
return s.es.Close(ctx)
}
2 changes: 1 addition & 1 deletion cqrs/eventstore/mongodb/eventstore_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@ func TestInstanceId(t *testing.T) {
}, nil)
defer func() {
store.Clear(ctx)
store.Close()
store.Close(ctx)
}()
assert.NoError(t, err)

Expand Down