mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-12-21 23:38:07 +08:00
348 lines
9.5 KiB
Go
348 lines
9.5 KiB
Go
package arangodb
|
|
|
|
import (
|
|
"context"
|
|
"crypto/tls"
|
|
"fmt"
|
|
"strconv"
|
|
"strings"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/arangodb/go-driver"
|
|
"github.com/arangodb/go-driver/http"
|
|
"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"
|
|
)
|
|
|
|
func init() {
|
|
filer.Stores = append(filer.Stores, &ArangodbStore{})
|
|
}
|
|
|
|
var (
|
|
BUCKET_PREFIX = "/buckets"
|
|
DEFAULT_COLLECTION = "seaweed_no_bucket"
|
|
KVMETA_COLLECTION = "seaweed_kvmeta"
|
|
)
|
|
|
|
type ArangodbStore struct {
|
|
connect driver.Connection
|
|
client driver.Client
|
|
database driver.Database
|
|
kvCollection driver.Collection
|
|
|
|
buckets map[string]driver.Collection
|
|
mu sync.RWMutex
|
|
|
|
databaseName string
|
|
}
|
|
|
|
type Model struct {
|
|
Key string `json:"_key"`
|
|
Directory string `json:"directory,omitempty"`
|
|
Name string `json:"name,omitempty"`
|
|
Ttl string `json:"ttl,omitempty"`
|
|
|
|
//arangodb does not support binary blobs
|
|
//we encode byte slice into uint64 slice
|
|
//see helpers.go
|
|
Meta []uint64 `json:"meta"`
|
|
}
|
|
|
|
func (store *ArangodbStore) GetName() string {
|
|
return "arangodb"
|
|
}
|
|
|
|
func (store *ArangodbStore) Initialize(configuration util.Configuration, prefix string) (err error) {
|
|
store.buckets = make(map[string]driver.Collection, 3)
|
|
store.databaseName = configuration.GetString(prefix + "db_name")
|
|
return store.connection(configuration.GetStringSlice(prefix+"servers"),
|
|
configuration.GetString(prefix+"username"),
|
|
configuration.GetString(prefix+"password"),
|
|
configuration.GetBool(prefix+"insecure_skip_verify"),
|
|
)
|
|
}
|
|
|
|
func (store *ArangodbStore) connection(uris []string, user string, pass string, insecure bool) (err error) {
|
|
ctx, cn := context.WithTimeout(context.Background(), 10*time.Second)
|
|
defer cn()
|
|
store.connect, err = http.NewConnection(http.ConnectionConfig{
|
|
Endpoints: uris,
|
|
TLSConfig: &tls.Config{
|
|
InsecureSkipVerify: insecure,
|
|
},
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
store.client, err = driver.NewClient(driver.ClientConfig{
|
|
Connection: store.connect,
|
|
Authentication: driver.BasicAuthentication(user, pass),
|
|
})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
ok, err := store.client.DatabaseExists(ctx, store.databaseName)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if ok {
|
|
store.database, err = store.client.Database(ctx, store.databaseName)
|
|
} else {
|
|
store.database, err = store.client.CreateDatabase(ctx, store.databaseName, &driver.CreateDatabaseOptions{})
|
|
}
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if store.kvCollection, err = store.ensureCollection(ctx, KVMETA_COLLECTION); err != nil {
|
|
return err
|
|
}
|
|
return err
|
|
}
|
|
|
|
type key int
|
|
|
|
const (
|
|
transactionKey key = 0
|
|
)
|
|
|
|
func (store *ArangodbStore) BeginTransaction(ctx context.Context) (context.Context, error) {
|
|
keys := make([]string, 0, len(store.buckets)+1)
|
|
for k := range store.buckets {
|
|
keys = append(keys, k)
|
|
}
|
|
keys = append(keys, store.kvCollection.Name())
|
|
txn, err := store.database.BeginTransaction(ctx, driver.TransactionCollections{
|
|
Exclusive: keys,
|
|
}, &driver.BeginTransactionOptions{})
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return context.WithValue(driver.WithTransactionID(ctx, txn), transactionKey, txn), nil
|
|
}
|
|
|
|
func (store *ArangodbStore) CommitTransaction(ctx context.Context) error {
|
|
val := ctx.Value(transactionKey)
|
|
cast, ok := val.(driver.TransactionID)
|
|
if !ok {
|
|
return fmt.Errorf("txn cast fail %s:", val)
|
|
}
|
|
err := store.database.CommitTransaction(ctx, cast, &driver.CommitTransactionOptions{})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (store *ArangodbStore) RollbackTransaction(ctx context.Context) error {
|
|
val := ctx.Value(transactionKey)
|
|
cast, ok := val.(driver.TransactionID)
|
|
if !ok {
|
|
return fmt.Errorf("txn cast fail %s:", val)
|
|
}
|
|
err := store.database.AbortTransaction(ctx, cast, &driver.AbortTransactionOptions{})
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (store *ArangodbStore) InsertEntry(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.GetChunks()) > filer.CountEntryChunksForGzip {
|
|
meta = util.MaybeGzipData(meta)
|
|
}
|
|
model := &Model{
|
|
Key: hashString(string(entry.FullPath)),
|
|
Directory: dir,
|
|
Name: name,
|
|
Meta: bytesToArray(meta),
|
|
}
|
|
if entry.TtlSec > 0 {
|
|
model.Ttl = time.Now().Add(time.Second * time.Duration(entry.TtlSec)).Format(time.RFC3339)
|
|
} else {
|
|
model.Ttl = ""
|
|
}
|
|
|
|
targetCollection, err := store.extractBucketCollection(ctx, entry.FullPath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = targetCollection.CreateDocument(ctx, model)
|
|
if driver.IsConflict(err) {
|
|
return store.UpdateEntry(ctx, entry)
|
|
}
|
|
|
|
if err != nil {
|
|
return fmt.Errorf("InsertEntry %s: %v", entry.FullPath, err)
|
|
}
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
func (store *ArangodbStore) 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.GetChunks()) > filer.CountEntryChunksForGzip {
|
|
meta = util.MaybeGzipData(meta)
|
|
}
|
|
model := &Model{
|
|
Key: hashString(string(entry.FullPath)),
|
|
Directory: dir,
|
|
Name: name,
|
|
Meta: bytesToArray(meta),
|
|
}
|
|
if entry.TtlSec > 0 {
|
|
model.Ttl = time.Now().Add(time.Duration(entry.TtlSec) * time.Second).Format(time.RFC3339)
|
|
} else {
|
|
model.Ttl = "none"
|
|
}
|
|
targetCollection, err := store.extractBucketCollection(ctx, entry.FullPath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = targetCollection.UpdateDocument(ctx, model.Key, model)
|
|
if err != nil {
|
|
return fmt.Errorf("UpdateEntry %s: %v", entry.FullPath, err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (store *ArangodbStore) FindEntry(ctx context.Context, fullpath util.FullPath) (entry *filer.Entry, err error) {
|
|
var data Model
|
|
targetCollection, err := store.extractBucketCollection(ctx, fullpath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
_, err = targetCollection.ReadDocument(ctx, hashString(string(fullpath)), &data)
|
|
if err != nil {
|
|
if driver.IsNotFound(err) {
|
|
return nil, filer_pb.ErrNotFound
|
|
}
|
|
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(arrayToBytes(data.Meta)))
|
|
if err != nil {
|
|
return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
|
|
}
|
|
|
|
return entry, nil
|
|
}
|
|
|
|
func (store *ArangodbStore) DeleteEntry(ctx context.Context, fullpath util.FullPath) (err error) {
|
|
targetCollection, err := store.extractBucketCollection(ctx, fullpath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
_, err = targetCollection.RemoveDocument(ctx, hashString(string(fullpath)))
|
|
if err != nil && !driver.IsNotFound(err) {
|
|
glog.Errorf("find %s: %v", fullpath, err)
|
|
return fmt.Errorf("delete %s : %v", fullpath, err)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// this runs in log time
|
|
func (store *ArangodbStore) DeleteFolderChildren(ctx context.Context, fullpath util.FullPath) (err error) {
|
|
var query string
|
|
targetCollection, err := store.extractBucketCollection(ctx, fullpath)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
query = query + fmt.Sprintf(`
|
|
for d in %s
|
|
filter starts_with(d.directory, "%s/") || d.directory == "%s"
|
|
remove d._key in %s`,
|
|
"`"+targetCollection.Name()+"`",
|
|
strings.Join(strings.Split(string(fullpath), "/"), ","),
|
|
string(fullpath),
|
|
"`"+targetCollection.Name()+"`",
|
|
)
|
|
cur, err := store.database.Query(ctx, query, nil)
|
|
if err != nil {
|
|
return fmt.Errorf("delete %s : %v", fullpath, err)
|
|
}
|
|
defer cur.Close()
|
|
return nil
|
|
}
|
|
|
|
func (store *ArangodbStore) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
|
|
return store.ListDirectoryPrefixedEntries(ctx, dirPath, startFileName, includeStartFile, limit, "", eachEntryFunc)
|
|
}
|
|
|
|
func (store *ArangodbStore) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc filer.ListEachEntryFunc) (lastFileName string, err error) {
|
|
targetCollection, err := store.extractBucketCollection(ctx, dirPath+"/")
|
|
if err != nil {
|
|
return lastFileName, err
|
|
}
|
|
query := "for d in " + "`" + targetCollection.Name() + "`"
|
|
if includeStartFile {
|
|
query = query + " filter d.name >= \"" + startFileName + "\" "
|
|
} else {
|
|
query = query + " filter d.name > \"" + startFileName + "\" "
|
|
}
|
|
if prefix != "" {
|
|
query = query + fmt.Sprintf(`&& starts_with(d.name, "%s")`, prefix)
|
|
}
|
|
query = query + `
|
|
filter d.directory == @dir
|
|
sort d.name asc
|
|
`
|
|
if limit > 0 {
|
|
query = query + "limit " + strconv.Itoa(int(limit))
|
|
}
|
|
query = query + "\n return d"
|
|
cur, err := store.database.Query(ctx, query, map[string]interface{}{"dir": dirPath})
|
|
if err != nil {
|
|
return lastFileName, fmt.Errorf("failed to list directory entries: find error: %w", err)
|
|
}
|
|
defer cur.Close()
|
|
for cur.HasMore() {
|
|
var data Model
|
|
_, err = cur.ReadDocument(ctx, &data)
|
|
if err != nil {
|
|
break
|
|
}
|
|
entry := &filer.Entry{
|
|
FullPath: util.NewFullPath(data.Directory, data.Name),
|
|
}
|
|
lastFileName = data.Name
|
|
converted := arrayToBytes(data.Meta)
|
|
if decodeErr := entry.DecodeAttributesAndChunks(util.MaybeDecompressData(converted)); decodeErr != nil {
|
|
err = decodeErr
|
|
glog.V(0).Infof("list %s : %v", entry.FullPath, err)
|
|
break
|
|
}
|
|
|
|
if !eachEntryFunc(entry) {
|
|
break
|
|
}
|
|
|
|
}
|
|
return lastFileName, err
|
|
}
|
|
|
|
func (store *ArangodbStore) Shutdown() {
|
|
}
|