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package filer_client
import ( "bytes" "fmt" "github.com/seaweedfs/seaweedfs/weed/filer" "github.com/seaweedfs/seaweedfs/weed/glog" "github.com/seaweedfs/seaweedfs/weed/mq/topic" "github.com/seaweedfs/seaweedfs/weed/pb" "github.com/seaweedfs/seaweedfs/weed/pb/filer_pb" "github.com/seaweedfs/seaweedfs/weed/pb/mq_pb" "google.golang.org/grpc" jsonpb "google.golang.org/protobuf/encoding/protojson" )
type FilerClientAccessor struct { GetFiler func() pb.ServerAddress GetGrpcDialOption func() grpc.DialOption }
func (fca *FilerClientAccessor) WithFilerClient(streamingMode bool, fn func(filer_pb.SeaweedFilerClient) error) error { return pb.WithFilerClient(streamingMode, 0, fca.GetFiler(), fca.GetGrpcDialOption(), fn) }
func (fca *FilerClientAccessor) SaveTopicConfToFiler(t *mq_pb.Topic, conf *mq_pb.ConfigureTopicResponse) error {
glog.V(0).Infof("save conf for topic %v to filer", t)
// save the topic configuration on filer
topicDir := fmt.Sprintf("%s/%s/%s", filer.TopicsDir, t.Namespace, t.Name) if err := fca.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error { var buf bytes.Buffer filer.ProtoToText(&buf, conf) return filer.SaveInsideFiler(client, topicDir, "topic.conf", buf.Bytes()) }); err != nil { return fmt.Errorf("save topic to %s: %v", topicDir, err) } return nil }
func (fca *FilerClientAccessor) ReadTopicConfFromFiler(t topic.Topic) (conf *mq_pb.ConfigureTopicResponse, err error) {
glog.V(0).Infof("load conf for topic %v from filer", t)
topicDir := fmt.Sprintf("%s/%s/%s", filer.TopicsDir, t.Namespace, t.Name) if err = fca.WithFilerClient(false, func(client filer_pb.SeaweedFilerClient) error { data, err := filer.ReadInsideFiler(client, topicDir, "topic.conf") if err == filer_pb.ErrNotFound { return err } if err != nil { return fmt.Errorf("read topic.conf of %v: %v", t, err) } // parse into filer conf object
conf = &mq_pb.ConfigureTopicResponse{} if err = jsonpb.Unmarshal(data, conf); err != nil { return fmt.Errorf("unmarshal topic %v conf: %v", t, err) } return nil }); err != nil { return nil, err }
return conf, nil }
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