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104 lines
2.9 KiB
104 lines
2.9 KiB
package topic
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"github.com/seaweedfs/seaweedfs/weed/filer"
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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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"github.com/seaweedfs/seaweedfs/weed/pb/schema_pb"
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jsonpb "google.golang.org/protobuf/encoding/protojson"
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)
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type Topic struct {
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Namespace string
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Name string
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}
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func NewTopic(namespace string, name string) Topic {
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return Topic{
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Namespace: namespace,
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Name: name,
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}
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}
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func FromPbTopic(topic *schema_pb.Topic) Topic {
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return Topic{
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Namespace: topic.Namespace,
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Name: topic.Name,
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}
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}
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func (t Topic) ToPbTopic() *schema_pb.Topic {
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return &schema_pb.Topic{
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Namespace: t.Namespace,
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Name: t.Name,
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}
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}
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func (t Topic) String() string {
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return fmt.Sprintf("%s.%s", t.Namespace, t.Name)
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}
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func (t Topic) Dir() string {
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return fmt.Sprintf("%s/%s/%s", filer.TopicsDir, t.Namespace, t.Name)
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}
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func (t Topic) ReadConfFile(client filer_pb.SeaweedFilerClient) (*mq_pb.ConfigureTopicResponse, error) {
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data, err := filer.ReadInsideFiler(client, t.Dir(), filer.TopicConfFile)
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if errors.Is(err, filer_pb.ErrNotFound) {
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return nil, err
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}
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if err != nil {
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return nil, fmt.Errorf("read topic.conf of %v: %w", 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 nil, fmt.Errorf("unmarshal topic %v conf: %w", t, err)
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}
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return conf, nil
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}
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// ReadConfFileWithMetadata reads the topic configuration and returns it along with file metadata
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func (t Topic) ReadConfFileWithMetadata(client filer_pb.SeaweedFilerClient) (*mq_pb.ConfigureTopicResponse, int64, int64, error) {
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// Use LookupDirectoryEntry to get both content and metadata
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request := &filer_pb.LookupDirectoryEntryRequest{
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Directory: t.Dir(),
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Name: filer.TopicConfFile,
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}
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resp, err := filer_pb.LookupEntry(context.Background(), client, request)
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if err != nil {
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if errors.Is(err, filer_pb.ErrNotFound) {
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return nil, 0, 0, err
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}
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return nil, 0, 0, fmt.Errorf("lookup topic.conf of %v: %w", t, err)
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}
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// Get file metadata
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var createdAtNs, modifiedAtNs int64
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if resp.Entry.Attributes != nil {
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createdAtNs = resp.Entry.Attributes.Crtime * 1e9 // convert seconds to nanoseconds
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modifiedAtNs = resp.Entry.Attributes.Mtime * 1e9 // convert seconds to nanoseconds
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}
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// Parse the configuration
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conf := &mq_pb.ConfigureTopicResponse{}
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if err = jsonpb.Unmarshal(resp.Entry.Content, conf); err != nil {
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return nil, 0, 0, fmt.Errorf("unmarshal topic %v conf: %w", t, err)
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}
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return conf, createdAtNs, modifiedAtNs, nil
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}
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func (t Topic) WriteConfFile(client filer_pb.SeaweedFilerClient, conf *mq_pb.ConfigureTopicResponse) error {
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var buf bytes.Buffer
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filer.ProtoToText(&buf, conf)
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if err := filer.SaveInsideFiler(client, t.Dir(), filer.TopicConfFile, buf.Bytes()); err != nil {
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return fmt.Errorf("save topic %v conf: %w", t, err)
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}
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return nil
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}
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