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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,128 @@ | ||
| package connpubsub | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "sync/atomic" | ||
| "time" | ||
|
|
||
| "cloud.google.com/go/pubsub" | ||
| lua "github.com/yuin/gopher-lua" | ||
|
|
||
| "github.com/PeerDB-io/peer-flow/generated/protos" | ||
| "github.com/PeerDB-io/peer-flow/model" | ||
| "github.com/PeerDB-io/peer-flow/pua" | ||
| ) | ||
|
|
||
| func (*PubSubConnector) SetupQRepMetadataTables(_ context.Context, _ *protos.QRepConfig) error { | ||
| return nil | ||
| } | ||
|
|
||
| func (c *PubSubConnector) SyncQRepRecords( | ||
| ctx context.Context, | ||
| config *protos.QRepConfig, | ||
| partition *protos.QRepPartition, | ||
| stream *model.QRecordStream, | ||
| ) (int, error) { | ||
| startTime := time.Now() | ||
| numRecords := atomic.Int64{} | ||
| schema := stream.Schema() | ||
| topiccache := topicCache{cache: make(map[string]*pubsub.Topic)} | ||
| publish := make(chan *pubsub.PublishResult, 32) | ||
| waitChan := make(chan struct{}) | ||
|
|
||
| wgCtx, wgErr := context.WithCancelCause(ctx) | ||
| pool, err := c.createPool(wgCtx, config.Script, config.FlowJobName, &topiccache, publish, wgErr) | ||
| if err != nil { | ||
| return 0, err | ||
| } | ||
| defer pool.Close() | ||
|
|
||
| go func() { | ||
| for curpub := range publish { | ||
| if _, err := curpub.Get(ctx); err != nil { | ||
| wgErr(err) | ||
| break | ||
| } | ||
| } | ||
| close(waitChan) | ||
| }() | ||
|
|
||
| Loop: | ||
| for { | ||
| select { | ||
| case qrecord, ok := <-stream.Records: | ||
| if !ok { | ||
| c.logger.Info("flushing batches because no more records") | ||
| break Loop | ||
| } | ||
|
|
||
| pool.Run(func(ls *lua.LState) []PubSubMessage { | ||
| items := model.NewRecordItems(len(qrecord)) | ||
| for i, val := range qrecord { | ||
| items.AddColumn(schema.Fields[i].Name, val) | ||
| } | ||
| record := &model.InsertRecord[model.RecordItems]{ | ||
| BaseRecord: model.BaseRecord{}, | ||
| Items: items, | ||
| SourceTableName: config.WatermarkTable, | ||
| DestinationTableName: config.DestinationTableIdentifier, | ||
| CommitID: 0, | ||
| } | ||
|
|
||
| lfn := ls.Env.RawGetString("onRecord") | ||
| fn, ok := lfn.(*lua.LFunction) | ||
| if !ok { | ||
| wgErr(fmt.Errorf("script should define `onRecord` as function, not %s", lfn)) | ||
| return nil | ||
| } | ||
|
|
||
| ls.Push(fn) | ||
| ls.Push(pua.LuaRecord.New(ls, record)) | ||
| err := ls.PCall(1, -1, nil) | ||
| if err != nil { | ||
| wgErr(fmt.Errorf("script failed: %w", err)) | ||
| return nil | ||
| } | ||
|
|
||
| args := ls.GetTop() | ||
| results := make([]PubSubMessage, 0, args) | ||
| for i := range args { | ||
| msg, err := lvalueToPubSubMessage(ls, ls.Get(i-args)) | ||
| if err != nil { | ||
| wgErr(err) | ||
| return nil | ||
| } | ||
| if msg.Message != nil { | ||
| if msg.Topic == "" { | ||
| msg.Topic = record.GetDestinationTableName() | ||
| } | ||
| results = append(results, msg) | ||
| } | ||
| } | ||
| ls.SetTop(0) | ||
| numRecords.Add(1) | ||
| return results | ||
| }) | ||
|
|
||
| case <-wgCtx.Done(): | ||
| break Loop | ||
| } | ||
| } | ||
|
|
||
| close(publish) | ||
| if err := pool.Wait(wgCtx); err != nil { | ||
| return 0, err | ||
| } | ||
| topiccache.Stop(wgCtx) | ||
| select { | ||
| case <-wgCtx.Done(): | ||
| return 0, wgCtx.Err() | ||
| case <-waitChan: | ||
| } | ||
|
|
||
| if err := c.FinishQRepPartition(ctx, partition, config.FlowJobName, startTime); err != nil { | ||
| return 0, err | ||
| } | ||
| return int(numRecords.Load()), nil | ||
| } |
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