135 lines
3.5 KiB
Go
Executable File
135 lines
3.5 KiB
Go
Executable File
package storage
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import (
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"context"
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"errors"
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"gitea.inhome.blapointe.com/local/storage/resolve"
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"strings"
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"time"
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"go.mongodb.org/mongo-driver/bson"
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"go.mongodb.org/mongo-driver/mongo"
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"go.mongodb.org/mongo-driver/mongo/options"
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"go.mongodb.org/mongo-driver/mongo/readconcern"
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"go.mongodb.org/mongo-driver/mongo/readpref"
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"go.mongodb.org/mongo-driver/mongo/writeconcern"
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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.NewClient(
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options.Client().ApplyURI("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) List(ns []string, limits ...string) ([]string, error) {
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namespace := resolve.Namespace(ns)
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limits = resolve.Limits(limits)
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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(resolve.DefaultNamespace).Collection(namespace)
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filter := bson.M{"_id": bson.M{
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"$gte": limits[0],
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"$lte": limits[1],
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}}
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projection := bson.M{"_id": 1}
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cursor, err := collection.Find(ctx, filter, options.Find().SetProjection(projection))
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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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keys := []string{}
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for cursor.Next(ctx) {
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var elem bson.Raw
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if err := cursor.Decode(&elem); err != nil {
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return nil, err
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}
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if raw, err := elem.LookupErr("_id"); err != nil {
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return nil, err
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} else if s, ok := raw.StringValueOK(); !ok {
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return nil, errors.New("_id is not a string")
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} else {
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keys = append(keys, s)
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}
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}
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return keys, nil
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}
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func (mg *Mongo) Get(key string, ns ...string) ([]byte, error) {
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namespace := resolve.Namespace(ns)
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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(resolve.DefaultNamespace).Collection(namespace)
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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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var elem bson.Raw
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if err := cursor.Decode(&elem); 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, ns ...string) error {
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namespace := resolve.Namespace(ns)
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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(resolve.DefaultNamespace).Collection(namespace)
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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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