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main.go
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main.go
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package main
import (
"context"
"log"
"strings"
"github.com/apache/pulsar-client-go/pulsar"
"github.com/reugn/go-streams/flow"
ext "github.com/reugn/go-streams/pulsar"
)
func main() {
clientOptions := pulsar.ClientOptions{URL: "pulsar://localhost:6650"}
producerOptions := pulsar.ProducerOptions{Topic: "test2"}
consumerOptions := pulsar.ConsumerOptions{
Topic: "test1",
SubscriptionName: "group1",
Type: pulsar.Exclusive,
}
ctx := context.Background()
source, err := ext.NewPulsarSource(ctx, &clientOptions, &consumerOptions)
if err != nil {
log.Fatal(err)
}
toUpperMapFlow := flow.NewMap(toUpper, 1)
sink, err := ext.NewPulsarSink(ctx, &clientOptions, &producerOptions)
if err != nil {
log.Fatal(err)
}
source.
Via(toUpperMapFlow).
To(sink)
}
var toUpper = func(msg pulsar.Message) string {
return strings.ToUpper(string(msg.Payload()))
}