135 lines
3.4 KiB
Go
Executable File
135 lines
3.4 KiB
Go
Executable File
package storage
|
|
|
|
import (
|
|
"context"
|
|
"errors"
|
|
"local/storage/resolve"
|
|
"strings"
|
|
"time"
|
|
|
|
"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/readconcern"
|
|
"go.mongodb.org/mongo-driver/mongo/readpref"
|
|
"go.mongodb.org/mongo-driver/mongo/writeconcern"
|
|
)
|
|
|
|
type Mongo struct {
|
|
db *mongo.Client
|
|
}
|
|
|
|
func NewMongo(addr string, auth ...string) (*Mongo, error) {
|
|
addr = strings.TrimPrefix(addr, "mongodb://")
|
|
var credentials *options.ClientOptions = nil
|
|
if len(auth) == 2 {
|
|
credentials = options.Client().SetAuth(options.Credential{
|
|
Username: auth[0],
|
|
Password: auth[1],
|
|
})
|
|
}
|
|
db, err := mongo.NewClient(
|
|
options.Client().ApplyURI("mongodb://"+addr),
|
|
options.Client().SetReadConcern(readconcern.Local()),
|
|
options.Client().SetReadPreference(readpref.PrimaryPreferred()),
|
|
options.Client().SetWriteConcern(writeconcern.New(
|
|
writeconcern.W(1),
|
|
writeconcern.J(false),
|
|
)),
|
|
credentials,
|
|
)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
|
defer cancel()
|
|
if err := db.Connect(ctx); err != nil {
|
|
return nil, err
|
|
}
|
|
if err := db.Ping(ctx, nil); err != nil {
|
|
return nil, err
|
|
}
|
|
if _, err := db.ListDatabaseNames(ctx, &bson.M{}); err != nil {
|
|
return nil, err
|
|
}
|
|
return &Mongo{db: db}, nil
|
|
}
|
|
|
|
func (mg *Mongo) List(ns []string, limits ...string) ([]string, error) {
|
|
namespace := resolve.Namespace(ns)
|
|
limits = resolve.Limits(limits)
|
|
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
|
defer cancel()
|
|
collection := mg.db.Database(DefaultNamespace).Collection(namespace)
|
|
filter := bson.M{"_id": bson.M{
|
|
"$gte": limits[0],
|
|
"$lte": limits[1],
|
|
}}
|
|
projection := bson.M{"_id": 1}
|
|
cursor, err := collection.Find(ctx, filter, options.Find().SetProjection(projection))
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer cursor.Close(ctx)
|
|
keys := []string{}
|
|
for cursor.Next(ctx) {
|
|
var elem bson.Raw
|
|
if err := cursor.Decode(&elem); err != nil {
|
|
return nil, err
|
|
}
|
|
if raw, err := elem.LookupErr("_id"); err != nil {
|
|
return nil, err
|
|
} else if s, ok := raw.StringValueOK(); !ok {
|
|
return nil, errors.New("_id is not a string")
|
|
} else {
|
|
keys = append(keys, s)
|
|
}
|
|
}
|
|
return keys, nil
|
|
}
|
|
|
|
func (mg *Mongo) Get(key string, ns ...string) ([]byte, error) {
|
|
namespace := resolve.Namespace(ns)
|
|
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
|
defer cancel()
|
|
collection := mg.db.Database(DefaultNamespace).Collection(namespace)
|
|
filter := bson.M{"_id": key}
|
|
cursor, err := collection.Find(ctx, filter)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer cursor.Close(ctx)
|
|
if !cursor.Next(ctx) {
|
|
return nil, ErrNotFound
|
|
}
|
|
|
|
var elem bson.Raw
|
|
if err := cursor.Decode(&elem); err != nil {
|
|
return nil, err
|
|
}
|
|
raw, err := elem.LookupErr("value")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
_, b, ok := raw.BinaryOK()
|
|
if !ok {
|
|
return nil, ErrNotImpl
|
|
}
|
|
return b, nil
|
|
}
|
|
|
|
func (mg *Mongo) Set(key string, value []byte, ns ...string) error {
|
|
namespace := resolve.Namespace(ns)
|
|
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
|
defer cancel()
|
|
collection := mg.db.Database(DefaultNamespace).Collection(namespace)
|
|
filter := bson.M{"_id": key}
|
|
document := bson.M{"value": value}
|
|
_, err := collection.ReplaceOne(ctx, filter, document, options.Replace().SetUpsert(true))
|
|
return err
|
|
}
|
|
|
|
func (mg *Mongo) Close() error {
|
|
return nil
|
|
}
|