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package mongodb
import (
"context"
"fmt"
"github.com/seaweedfs/seaweedfs/weed/filer"
"github.com/seaweedfs/seaweedfs/weed/glog"
"github.com/seaweedfs/seaweedfs/weed/pb/filer_pb"
"github.com/seaweedfs/seaweedfs/weed/util"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"go.mongodb.org/mongo-driver/x/bsonx"
"time"
)
func init() {
filer.Stores = append(filer.Stores, &MongodbStore{})
}
type MongodbStore struct {
connect *mongo.Client
database string
collectionName string
}
type Model struct {
Directory string `bson:"directory"`
Name string `bson:"name"`
Meta []byte `bson:"meta"`
}
func (store *MongodbStore) GetName() string {
return "mongodb"
}
func (store *MongodbStore) Initialize(configuration util.Configuration, prefix string) (err error) {
store.database = configuration.GetString(prefix + "database")
store.collectionName = "filemeta"
poolSize := configuration.GetInt(prefix + "option_pool_size")
return store.connection(configuration.GetString(prefix+"uri"), uint64(poolSize))
}
func (store *MongodbStore) connection(uri string, poolSize uint64) (err error) {
ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
opts := options.Client().ApplyURI(uri)
if poolSize > 0 {
opts.SetMaxPoolSize(poolSize)
}
client, err := mongo.Connect(ctx, opts)
if err != nil {
return err
}
c := client.Database(store.database).Collection(store.collectionName)
err = store.indexUnique(c)
store.connect = client
return err
}
func (store *MongodbStore) createIndex(c *mongo.Collection, index mongo.IndexModel, opts *options.CreateIndexesOptions) error {
_, err := c.Indexes().CreateOne(context.Background(), index, opts)
return err
}
func (store *MongodbStore) indexUnique(c *mongo.Collection) error {
opts := options.CreateIndexes().SetMaxTime(10 * time.Second)
unique := new(bool)
*unique = true
index := mongo.IndexModel{
Keys: bsonx.Doc{{Key: "directory", Value: bsonx.Int32(1)}, {Key: "name", Value: bsonx.Int32(1)}},
Options: &options.IndexOptions{
Unique: unique,
},
}
return store.createIndex(c, index, opts)
}
func (store *MongodbStore) BeginTransaction(ctx context.Context) (context.Context, error) {
return ctx, nil
}
func (store *MongodbStore) CommitTransaction(ctx context.Context) error {
return nil
}
func (store *MongodbStore) RollbackTransaction(ctx context.Context) error {
return nil
}
func (store *MongodbStore) InsertEntry(ctx context.Context, entry *filer.Entry) (err error) {
return store.UpdateEntry(ctx, entry)
}
func (store *MongodbStore) UpdateEntry(ctx context.Context, entry *filer.Entry) (err error) {
dir, name := entry.FullPath.DirAndName()
meta, err := entry.EncodeAttributesAndChunks()
if err != nil {
return fmt.Errorf("encode %s: %s", entry.FullPath, err)
}
if len(entry.Chunks) > filer.CountEntryChunksForGzip {
meta = util.MaybeGzipData(meta)
}
c := store.connect.Database(store.database).Collection(store.collectionName)
opts := options.Update().SetUpsert(true)
filter := bson.D{{"directory", dir}, {"name", name}}
update := bson.D{{"$set", bson.D{{"meta", meta}}}}
_, err = c.UpdateOne(ctx, filter, update, opts)
if err != nil {
return fmt.Errorf("UpdateEntry %s: %v", entry.FullPath, err)
}
return nil
}
func (store *MongodbStore) FindEntry(ctx context.Context, fullpath util.FullPath) (entry *filer.Entry, err error) {
dir, name := fullpath.DirAndName()
var data Model
var where = bson.M{"directory": dir, "name": name}
err = store.connect.Database(store.database).Collection(store.collectionName).FindOne(ctx, where).Decode(&data)
if err != mongo.ErrNoDocuments && err != nil {
glog.Errorf("find %s: %v", fullpath, err)
return nil, filer_pb.ErrNotFound
}
if len(data.Meta) == 0 {
return nil, filer_pb.ErrNotFound
}
entry = &filer.Entry{
FullPath: fullpath,
}
err = entry.DecodeAttributesAndChunks(util.MaybeDecompressData(data.Meta))
if err != nil {
return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
}
return entry, nil
}
func (store *MongodbStore) DeleteEntry(ctx context.Context, fullpath util.FullPath) error {
dir, name := fullpath.DirAndName()
where := bson.M{"directory": dir, "name": name}
_, err := store.connect.Database(store.database).Collection(store.collectionName).DeleteMany(ctx, where)
if err != nil {
return fmt.Errorf("delete %s : %v", fullpath, err)
}
return nil
}
func (store *MongodbStore) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) error {
where := bson.M{"directory": fullpath}
_, err := store.connect.Database(store.database).Collection(store.collectionName).DeleteMany(ctx, where)
if err != nil {
return fmt.Errorf("delete %s : %v", fullpath, err)
}
return nil
}
func (store *MongodbStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
return lastFileName, filer.ErrUnsupportedListDirectoryPrefixed
}
func (store *MongodbStore) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
var where = bson.M{"directory": string(dirPath), "name": bson.M{"$gt": startFileName}}
if includeStartFile {
where["name"] = bson.M{
"$gte": startFileName,
}
}
optLimit := int64(limit)
opts := &options.FindOptions{Limit: &optLimit, Sort: bson.M{"name": 1}}
cur, err := store.connect.Database(store.database).Collection(store.collectionName).Find(ctx, where, opts)
if err != nil {
return lastFileName, fmt.Errorf("failed to list directory entries: find error: %w", err)
}
for cur.Next(ctx) {
var data Model
err = cur.Decode(&data)
if err != nil {
break
}
entry := &filer.Entry{
FullPath: util.NewFullPath(string(dirPath), data.Name),
}
lastFileName = data.Name
if decodeErr := entry.DecodeAttributesAndChunks(util.MaybeDecompressData(data.Meta)); decodeErr != nil {
err = decodeErr
glog.V(0).Infof("list %s : %v", entry.FullPath, err)
break
}
if !eachEntryFunc(entry) {
break
}
}
if err := cur.Close(ctx); err != nil {
glog.V(0).Infof("list iterator close: %v", err)
}
return lastFileName, err
}
func (store *MongodbStore) Shutdown() {
ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
store.connect.Disconnect(ctx)
}
|
