mirror of
https://github.com/seaweedfs/seaweedfs.git
synced 2024-01-19 02:48:24 +00:00
133 lines
3.6 KiB
Go
133 lines
3.6 KiB
Go
package cassandra
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"github.com/chrislusf/seaweedfs/weed/filer2"
|
|
"github.com/chrislusf/seaweedfs/weed/glog"
|
|
"github.com/chrislusf/seaweedfs/weed/util"
|
|
"github.com/gocql/gocql"
|
|
)
|
|
|
|
func init() {
|
|
filer2.Stores = append(filer2.Stores, &CassandraStore{})
|
|
}
|
|
|
|
type CassandraStore struct {
|
|
cluster *gocql.ClusterConfig
|
|
session *gocql.Session
|
|
}
|
|
|
|
func (store *CassandraStore) GetName() string {
|
|
return "cassandra"
|
|
}
|
|
|
|
func (store *CassandraStore) Initialize(configuration util.Configuration) (err error) {
|
|
return store.initialize(
|
|
configuration.GetString("keyspace"),
|
|
configuration.GetStringSlice("hosts"),
|
|
)
|
|
}
|
|
|
|
func (store *CassandraStore) initialize(keyspace string, hosts []string) (err error) {
|
|
store.cluster = gocql.NewCluster(hosts...)
|
|
store.cluster.Keyspace = keyspace
|
|
store.cluster.Consistency = gocql.LocalQuorum
|
|
store.session, err = store.cluster.CreateSession()
|
|
if err != nil {
|
|
glog.V(0).Infof("Failed to open cassandra store, hosts %v, keyspace %s", hosts, keyspace)
|
|
}
|
|
return
|
|
}
|
|
|
|
func (store *CassandraStore) InsertEntry(ctx context.Context, entry *filer2.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 err := store.session.Query(
|
|
"INSERT INTO filemeta (directory,name,meta) VALUES(?,?,?) USING TTL ? ",
|
|
dir, name, meta, entry.TtlSec).Exec(); err != nil {
|
|
return fmt.Errorf("insert %s: %s", entry.FullPath, err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (store *CassandraStore) UpdateEntry(ctx context.Context, entry *filer2.Entry) (err error) {
|
|
|
|
return store.InsertEntry(ctx, entry)
|
|
}
|
|
|
|
func (store *CassandraStore) FindEntry(ctx context.Context, fullpath filer2.FullPath) (entry *filer2.Entry, err error) {
|
|
|
|
dir, name := fullpath.DirAndName()
|
|
var data []byte
|
|
if err := store.session.Query(
|
|
"SELECT meta FROM filemeta WHERE directory=? AND name=?",
|
|
dir, name).Consistency(gocql.One).Scan(&data); err != nil {
|
|
if err != gocql.ErrNotFound {
|
|
return nil, filer2.ErrNotFound
|
|
}
|
|
}
|
|
|
|
if len(data) == 0 {
|
|
return nil, fmt.Errorf("not found: %s", fullpath)
|
|
}
|
|
|
|
entry = &filer2.Entry{
|
|
FullPath: fullpath,
|
|
}
|
|
err = entry.DecodeAttributesAndChunks(data)
|
|
if err != nil {
|
|
return entry, fmt.Errorf("decode %s : %v", entry.FullPath, err)
|
|
}
|
|
|
|
return entry, nil
|
|
}
|
|
|
|
func (store *CassandraStore) DeleteEntry(ctx context.Context, fullpath filer2.FullPath) error {
|
|
|
|
dir, name := fullpath.DirAndName()
|
|
|
|
if err := store.session.Query(
|
|
"DELETE FROM filemeta WHERE directory=? AND name=?",
|
|
dir, name).Exec(); err != nil {
|
|
return fmt.Errorf("delete %s : %v", fullpath, err)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
func (store *CassandraStore) ListDirectoryEntries(ctx context.Context, fullpath filer2.FullPath, startFileName string, inclusive bool,
|
|
limit int) (entries []*filer2.Entry, err error) {
|
|
|
|
cqlStr := "SELECT NAME, meta FROM filemeta WHERE directory=? AND name>? ORDER BY NAME ASC LIMIT ?"
|
|
if inclusive {
|
|
cqlStr = "SELECT NAME, meta FROM filemeta WHERE directory=? AND name>=? ORDER BY NAME ASC LIMIT ?"
|
|
}
|
|
|
|
var data []byte
|
|
var name string
|
|
iter := store.session.Query(cqlStr, string(fullpath), startFileName, limit).Iter()
|
|
for iter.Scan(&name, &data) {
|
|
entry := &filer2.Entry{
|
|
FullPath: filer2.NewFullPath(string(fullpath), name),
|
|
}
|
|
if decodeErr := entry.DecodeAttributesAndChunks(data); decodeErr != nil {
|
|
err = decodeErr
|
|
glog.V(0).Infof("list %s : %v", entry.FullPath, err)
|
|
break
|
|
}
|
|
entries = append(entries, entry)
|
|
}
|
|
if err := iter.Close(); err != nil {
|
|
glog.V(0).Infof("list iterator close: %v", err)
|
|
}
|
|
|
|
return entries, err
|
|
}
|