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* feat: added topic exists check (#59) * chore: * chore: dummy * feat: implement topic verify process * chore: lint fix * feat: bump kafka-cronsumer verify topic commit * feat: add verifyTopicOnStartup flag --------- Co-authored-by: keremcankabadayi <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| package kafka | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
|
|
||
| "github.com/segmentio/kafka-go" | ||
| ) | ||
|
|
||
| type kafkaClient interface { | ||
| Metadata(ctx context.Context, req *kafka.MetadataRequest) (*kafka.MetadataResponse, error) | ||
| GetClient() *kafka.Client | ||
| } | ||
|
|
||
| type client struct { | ||
| *kafka.Client | ||
| } | ||
|
|
||
| func newKafkaClient(cfg *ConsumerConfig) (kafkaClient, error) { | ||
| kc := client{ | ||
| Client: &kafka.Client{ | ||
| Addr: kafka.TCP(cfg.Reader.Brokers...), | ||
| }, | ||
| } | ||
|
|
||
| transport := &Transport{ | ||
| Transport: &kafka.Transport{ | ||
| MetadataTopics: cfg.getTopics(), | ||
| }, | ||
| } | ||
| if err := fillLayer(transport, cfg.SASL, cfg.TLS); err != nil { | ||
| return nil, fmt.Errorf("error when initializing kafka client for verify topic purpose %w", err) | ||
| } | ||
|
|
||
| kc.Transport = transport | ||
| return &kc, nil | ||
| } | ||
|
|
||
| func (k *client) GetClient() *kafka.Client { | ||
| return k.Client | ||
| } | ||
|
|
||
| func verifyTopics(client kafkaClient, cfg *ConsumerConfig) (bool, error) { | ||
| topics := cfg.getTopics() | ||
|
|
||
| metadata, err := client.Metadata(context.Background(), &kafka.MetadataRequest{ | ||
| Topics: topics, | ||
| }) | ||
| if err != nil { | ||
| return false, fmt.Errorf("error when during verifyTopics metadata request %w", err) | ||
| } | ||
| return checkTopicsWithinMetadata(metadata, topics) | ||
| } | ||
|
|
||
| func checkTopicsWithinMetadata(metadata *kafka.MetadataResponse, topics []string) (bool, error) { | ||
| metadataTopics := make(map[string]struct{}, len(metadata.Topics)) | ||
| for _, topic := range metadata.Topics { | ||
| if topic.Error != nil { | ||
| continue | ||
| } | ||
| metadataTopics[topic.Name] = struct{}{} | ||
| } | ||
|
|
||
| for _, topic := range topics { | ||
| if _, exist := metadataTopics[topic]; !exist { | ||
| return false, nil | ||
| } | ||
| } | ||
| return true, nil | ||
| } |
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