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