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package B2Sink
import (
"context"
"strings"
"github.com/chrislusf/seaweedfs/weed/filer2"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/replication/sink"
"github.com/chrislusf/seaweedfs/weed/replication/source"
"github.com/chrislusf/seaweedfs/weed/util"
"github.com/kurin/blazer/b2"
)
type B2Sink struct {
client *b2.Client
bucket string
dir string
filerSource *source.FilerSource
}
func init() {
sink.Sinks = append(sink.Sinks, &B2Sink{})
}
func (g *B2Sink) GetName() string {
return "backblaze"
}
func (g *B2Sink) GetSinkToDirectory() string {
return g.dir
}
func (g *B2Sink) Initialize(configuration util.Configuration, prefix string) error {
return g.initialize(
configuration.GetString(prefix+"b2_account_id"),
configuration.GetString(prefix+"b2_master_application_key"),
configuration.GetString(prefix+"bucket"),
configuration.GetString(prefix+"directory"),
)
}
func (g *B2Sink) SetSourceFiler(s *source.FilerSource) {
g.filerSource = s
}
func (g *B2Sink) initialize(accountId, accountKey, bucket, dir string) error {
ctx := context.Background()
client, err := b2.NewClient(ctx, accountId, accountKey)
if err != nil {
return err
}
g.client = client
g.bucket = bucket
g.dir = dir
return nil
}
func (g *B2Sink) DeleteEntry(ctx context.Context, key string, isDirectory, deleteIncludeChunks bool) error {
key = cleanKey(key)
if isDirectory {
key = key + "/"
}
bucket, err := g.client.Bucket(ctx, g.bucket)
if err != nil {
return err
}
targetObject := bucket.Object(key)
return targetObject.Delete(ctx)
}
func (g *B2Sink) CreateEntry(ctx context.Context, key string, entry *filer_pb.Entry) error {
key = cleanKey(key)
if entry.IsDirectory {
return nil
}
totalSize := filer2.TotalSize(entry.Chunks)
chunkViews := filer2.ViewFromChunks(entry.Chunks, 0, int(totalSize))
bucket, err := g.client.Bucket(ctx, g.bucket)
if err != nil {
return err
}
targetObject := bucket.Object(key)
writer := targetObject.NewWriter(ctx)
for _, chunk := range chunkViews {
fileUrl, err := g.filerSource.LookupFileId(ctx, chunk.FileId)
if err != nil {
return err
}
var writeErr error
_, readErr := util.ReadUrlAsStream(fileUrl, chunk.Offset, int(chunk.Size), func(data []byte) {
_, err := writer.Write(data)
if err != nil {
writeErr = err
}
})
if readErr != nil {
return readErr
}
if writeErr != nil {
return writeErr
}
}
return writer.Close()
}
func (g *B2Sink) UpdateEntry(ctx context.Context, key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool) (foundExistingEntry bool, err error) {
key = cleanKey(key)
// TODO improve efficiency
return false, nil
}
func cleanKey(key string) string {
if strings.HasPrefix(key, "/") {
key = key[1:]
}
return key
}
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