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main.go
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main.go
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package main
import (
"context"
"net/http"
"os"
"os/signal"
"syscall"
"time"
"log/slog"
"github.com/birdayz/kstreams"
"github.com/birdayz/kstreams/serde"
"github.com/lmittmann/tint"
)
var log = slog.New(tint.NewHandler(os.Stderr, nil))
func init() {
go func() {
http.ListenAndServe("localhost:6060", nil)
}()
}
func main() {
builder := kstreams.NewTopologyBuilder()
kstreams.MustRegisterSource(builder, "test", "test", serde.StringDeserializer, serde.StringDeserializer)
kstreams.MustRegisterProcessor(builder,
func() kstreams.Processor[string, string, string, string] {
return &PrintlnProcessor{}
},
"printer",
"test",
)
kstreams.MustRegisterSink(builder, "testout", "testout", serde.StringSerializer, serde.StringSerializer, "printer")
topology := builder.MustBuild()
app := kstreams.New(topology, "my-sample-app", kstreams.WithLog(log), kstreams.WithCommitInterval(time.Second*2))
go func() {
c := make(chan os.Signal)
signal.Notify(c, os.Interrupt, syscall.SIGTERM)
<-c
app.Close()
}()
if err := app.Run(); err != nil {
log.Error("App run failed", err)
}
}
type PrintlnProcessor struct {
processorContext kstreams.ProcessorContext[string, string]
}
func (p *PrintlnProcessor) Init(processorContext kstreams.ProcessorContext[string, string]) error {
p.processorContext = processorContext
return nil
}
func (p *PrintlnProcessor) Close() error {
return nil
}
// TODO make output key WindowKey[string], and generalize this
func (p *PrintlnProcessor) Process(ctx context.Context, k string, v string) error {
p.processorContext.Forward(ctx, k, v+"out")
// fmt.Println("zzzz")
// fmt.Println(k, v)
return nil
}