98 lines
2.4 KiB
Go
98 lines
2.4 KiB
Go
package storage
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import (
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"context"
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"strings"
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"time"
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"github.com/mongodb/mongo-go-driver/mongo"
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"github.com/mongodb/mongo-go-driver/mongo/options"
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"github.com/mongodb/mongo-go-driver/mongo/readconcern"
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"github.com/mongodb/mongo-go-driver/mongo/readpref"
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"github.com/mongodb/mongo-go-driver/mongo/writeconcern"
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"gopkg.in/mgo.v2/bson"
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)
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type Mongo struct {
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db *mongo.Client
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}
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func NewMongo(addr string, auth ...string) (*Mongo, error) {
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addr = strings.TrimPrefix(addr, "mongodb://")
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var credentials *options.ClientOptions = nil
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if len(auth) == 2 {
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credentials = options.Client().SetAuth(options.Credential{
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Username: auth[0],
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Password: auth[1],
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})
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}
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db, err := mongo.NewClientWithOptions(
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"mongodb://"+addr,
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options.Client().SetReadConcern(readconcern.Local()),
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options.Client().SetReadPreference(readpref.PrimaryPreferred()),
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options.Client().SetWriteConcern(writeconcern.New(
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writeconcern.W(1),
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writeconcern.J(false),
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)),
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credentials,
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)
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if err != nil {
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return nil, err
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}
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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if err := db.Connect(ctx); err != nil {
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return nil, err
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}
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if err := db.Ping(ctx, nil); err != nil {
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return nil, err
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}
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if _, err := db.ListDatabaseNames(ctx, &bson.M{}); err != nil {
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return nil, err
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}
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return &Mongo{db: db}, nil
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}
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func (mg *Mongo) Get(key string) ([]byte, error) {
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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collection := mg.db.Database(DefaultNamespace).Collection(DefaultNamespace)
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filter := bson.M{"_id": key}
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cursor, err := collection.Find(ctx, filter)
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if err != nil {
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return nil, err
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}
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defer cursor.Close(ctx)
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if !cursor.Next(ctx) {
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return nil, ErrNotFound
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}
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elem, err := cursor.DecodeBytes()
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if err != nil {
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return nil, err
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}
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raw, err := elem.LookupErr("value")
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if err != nil {
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return nil, err
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}
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_, b, ok := raw.BinaryOK()
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if !ok {
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return nil, ErrNotImpl
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}
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return b, nil
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}
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func (mg *Mongo) Set(key string, value []byte) error {
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ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
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defer cancel()
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collection := mg.db.Database(DefaultNamespace).Collection(DefaultNamespace)
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filter := bson.M{"_id": key}
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document := bson.M{"value": value}
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_, err := collection.ReplaceOne(ctx, filter, document, options.Replace().SetUpsert(true))
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return err
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}
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func (mg *Mongo) Close() error {
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return nil
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}
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