This repository has been archived by the owner on Dec 11, 2024. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge pull request #30 from usedatabrew/feat/source-kafka
feat(source-plugin): kafka as a source plugin
- Loading branch information
Showing
5 changed files
with
173 additions
and
30 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| package kafka | ||
|
|
||
| type Config struct { | ||
| Brokers []string `json:"brokers" yaml:"brokers"` | ||
| Sasl bool `json:"sasl" yaml:"sasl"` | ||
| SaslPassword string `json:"sasl_password" yaml:"sasl_password"` | ||
| SaslUser string `json:"sasl_user" yaml:"sasl_user"` | ||
| SaslMechanism string `json:"sasl_mechanism" yaml:"sasl_mechanism"` | ||
| ConsumerGroup string `json:"consumer_group" yaml:"consumer_group"` | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,149 @@ | ||
| package kafka | ||
|
|
||
| import ( | ||
| "context" | ||
| "encoding/json" | ||
| "fmt" | ||
| "strings" | ||
|
|
||
| "github.com/apache/arrow/go/v14/arrow" | ||
| "github.com/apache/arrow/go/v14/arrow/array" | ||
| "github.com/apache/arrow/go/v14/arrow/memory" | ||
| "github.com/twmb/franz-go/pkg/kgo" | ||
| "github.com/twmb/franz-go/pkg/sasl/aws" | ||
| "github.com/twmb/franz-go/pkg/sasl/plain" | ||
| "github.com/twmb/franz-go/pkg/sasl/scram" | ||
| "github.com/usedatabrew/blink/internal/schema" | ||
| "github.com/usedatabrew/blink/internal/sources" | ||
| "github.com/usedatabrew/message" | ||
| ) | ||
|
|
||
| type SourcePlugin struct { | ||
| ctx context.Context | ||
| config Config | ||
| client *kgo.Client | ||
| stream string | ||
| inputSchema []schema.StreamSchema | ||
| outputSchema map[string]*arrow.Schema | ||
| messageStream chan sources.MessageEvent | ||
| } | ||
|
|
||
| func NewKafkaSourcePlugin(config Config, schema []schema.StreamSchema) sources.DataSource { | ||
| return &SourcePlugin{ | ||
| ctx: context.Background(), | ||
| config: config, | ||
| stream: schema[0].StreamName, | ||
| inputSchema: schema, | ||
| outputSchema: sources.BuildOutputSchema(schema), | ||
| messageStream: make(chan sources.MessageEvent), | ||
| } | ||
| } | ||
|
|
||
| func (p *SourcePlugin) Connect(ctx context.Context) error { | ||
| client, err := kgo.NewClient(p.GetConfig()...) | ||
|
|
||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| err = client.Ping(p.ctx) | ||
|
|
||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| p.client = client | ||
|
|
||
| return nil | ||
| } | ||
|
|
||
| func (p *SourcePlugin) Start() { | ||
| go func(c *kgo.Client) { | ||
| fetches := p.client.PollFetches(p.ctx) | ||
|
|
||
| if errs := fetches.Errors(); len(errs) > 0 { | ||
| panic(fmt.Sprint(errs)) | ||
| } | ||
|
|
||
| iter := fetches.RecordIter() | ||
|
|
||
| for !iter.Done() { | ||
| record := iter.Next() | ||
|
|
||
| builder := array.NewRecordBuilder(memory.DefaultAllocator, p.outputSchema[record.Topic]) | ||
|
|
||
| err := json.Unmarshal(record.Value, &builder) | ||
|
|
||
| if err != nil { | ||
| panic(err) | ||
| } | ||
|
|
||
| mBytes, _ := builder.NewRecord().MarshalJSON() | ||
| m := message.NewMessage(message.Insert, p.stream, mBytes) | ||
|
|
||
| p.messageStream <- sources.MessageEvent{ | ||
| Message: m, | ||
| Err: nil, | ||
| } | ||
| } | ||
| }(p.client) | ||
| } | ||
|
|
||
| func (p *SourcePlugin) Stop() { | ||
| p.client.Close() | ||
| p.ctx.Done() | ||
| } | ||
|
|
||
| func (p *SourcePlugin) Events() chan sources.MessageEvent { | ||
| return p.messageStream | ||
| } | ||
|
|
||
| func (p *SourcePlugin) GetConfig() []kgo.Opt { | ||
| topics := make([]string, 0, len(p.outputSchema)) | ||
|
|
||
| for topic := range p.outputSchema { | ||
| topics = append(topics, topic) | ||
| } | ||
|
|
||
| opts := []kgo.Opt{ | ||
| kgo.SeedBrokers(p.config.Brokers...), | ||
| kgo.ConsumerGroup(p.config.ConsumerGroup), | ||
| kgo.ConsumeTopics(topics...), | ||
| kgo.ConsumeResetOffset(kgo.NewOffset().AtStart()), | ||
| } | ||
|
|
||
| if p.config.Sasl { | ||
| if p.config.SaslMechanism == "" || p.config.SaslUser == "" || p.config.SaslPassword == "" { | ||
| panic("sasl param must be specified") | ||
| } | ||
| method := strings.ToLower(p.config.SaslMechanism) | ||
| method = strings.ReplaceAll(method, "-", "") | ||
| method = strings.ReplaceAll(method, "_", "") | ||
| switch method { | ||
| case "plain": | ||
| opts = append(opts, kgo.SASL(plain.Auth{ | ||
| User: p.config.SaslUser, | ||
| Pass: p.config.SaslPassword, | ||
| }.AsMechanism())) | ||
| case "scramsha256": | ||
| opts = append(opts, kgo.SASL(scram.Auth{ | ||
| User: p.config.SaslUser, | ||
| Pass: p.config.SaslPassword, | ||
| }.AsSha256Mechanism())) | ||
| case "scramsha512": | ||
| opts = append(opts, kgo.SASL(scram.Auth{ | ||
| User: p.config.SaslUser, | ||
| Pass: p.config.SaslPassword, | ||
| }.AsSha512Mechanism())) | ||
| case "awsmskiam": | ||
| opts = append(opts, kgo.SASL(aws.Auth{ | ||
| AccessKey: p.config.SaslUser, | ||
| SecretKey: p.config.SaslPassword, | ||
| }.AsManagedStreamingIAMMechanism())) | ||
| default: | ||
| panic(fmt.Sprintf("unrecognized sasl option %s", p.config.SaslMechanism)) | ||
| } | ||
| } | ||
|
|
||
| return opts | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters