Files
storage/mongodb/mongodb.go
2020-10-31 09:51:32 +01:00

134 lines
3.6 KiB
Go

package mongodb
import (
"context"
"time"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/bson/primitive"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
// Storage interface that is implemented by storage providers
type Storage struct {
db *mongo.Collection
}
type MongoStorage struct {
ObjectID primitive.ObjectID `json:"_id,omitempty" bson:"_id,omitempty"`
Key string `json:"key,omitempty" bson:"key"`
Value []byte `json:"value" bson:"value"`
Exp time.Time `json:"exp" bson:"exp,omitempty"`
}
// New creates a new MongoDB storage
func New(config ...Config) *Storage {
// Set default config
cfg := ConfigDefault
// Override config if provided
if len(config) > 0 {
cfg = configDefault(config[0])
}
// Set mongo options
opt := options.Client()
opt.SetAppName(cfg.AppName)
opt.SetAuth(cfg.Auth)
opt.SetAutoEncryptionOptions(cfg.AutoEncryptionOptions)
opt.SetConnectTimeout(cfg.ConnectTimeout)
opt.SetCompressors(cfg.Compressors)
opt.SetDialer(cfg.Dialer)
opt.SetDirect(cfg.Direct)
opt.SetDisableOCSPEndpointCheck(cfg.DisableOCSPEndpointCheck)
opt.SetHeartbeatInterval(cfg.HeartbeatInterval)
opt.SetHosts(cfg.Hosts)
opt.SetLocalThreshold(cfg.LocalThreshold)
opt.SetMaxConnIdleTime(cfg.MaxConnIdleTime)
opt.SetMaxPoolSize(cfg.MaxPoolSize)
opt.SetMinPoolSize(cfg.MinPoolSize)
opt.SetPoolMonitor(cfg.PoolMonitor)
opt.SetMonitor(cfg.Monitor)
opt.SetReadConcern(cfg.ReadConcern)
opt.SetReadPreference(cfg.ReadPreference)
opt.SetRegistry(cfg.Registry)
opt.SetReplicaSet(cfg.ReplicaSet)
opt.SetRetryReads(cfg.RetryReads)
opt.SetRetryWrites(cfg.RetryWrites)
opt.SetServerSelectionTimeout(cfg.ServerSelectionTimeout)
opt.SetSocketTimeout(cfg.SocketTimeout)
opt.SetTLSConfig(cfg.TLSConfig)
opt.SetWriteConcern(cfg.WriteConcern)
opt.SetZlibLevel(cfg.ZlibLevel)
opt.SetZstdLevel(cfg.ZstdLevel)
// Create mongo client
client, err := mongo.NewClient(opt.ApplyURI("mongodb://" + cfg.Addr))
if err != nil {
panic(err)
}
// Get collection from database
db := client.Database(cfg.Database).Collection(cfg.Collection)
// expired data may exist for some time beyond the 60 second period between runs of the background task.
// more on https://docs.mongodb.com/manual/core/index-ttl/
indexModel := mongo.IndexModel{
Keys: bson.D{{"exp", 1}},
// setting to 0
// means that documents will remain in the collection
// until they're explicitly deleted or the collection is dropped.
Options: options.Index().SetExpireAfterSeconds(0),
}
if _, err := db.Indexes().CreateOne(context.TODO(), indexModel); err != nil {
panic(err)
}
return &Storage{
db: db,
}
}
// Get value by key
func (s *Storage) Get(key string) ([]byte, error) {
res := s.db.FindOne(context.TODO(), bson.M{"key": key})
result := MongoStorage{}
if err := res.Err(); err != nil {
return []byte{}, err
}
if err := res.Decode(&result); err != nil {
return []byte{}, err
}
return result.Value, nil
}
// Set key with value, replace if document exits
func (s *Storage) Set(key string, val []byte, exp time.Duration) error {
filter := bson.M{"id": key}
replace := MongoStorage{
Key: key,
Value: val,
}
if exp != 0 {
replace.Exp = time.Now().Add(exp).UTC()
}
_, err := s.db.ReplaceOne(context.TODO(), filter, replace, options.Replace().SetUpsert(true))
return err
}
// Delete document by key
func (s *Storage) Delete(key string) error {
_, err := s.db.DeleteOne(context.TODO(), bson.M{"key": key})
return err
}
// Clear all keys by drop collection
func (s *Storage) Clear() error {
return s.db.Drop(context.TODO())
}