feat: add nsq e2e image

e2e/images/nsq/Dockerfile

@@ -0,0 +1,11 @@
+FROM golang:1.22
+WORKDIR /cmd
+
+COPY go.mod go.sum ./
+RUN go mod download
+
+COPY *.go ./
+
+RUN CGO_ENABLED=0 GOOS=linux go build -o cmd .
+
+ENTRYPOINT ["./cmd"]

e2e/images/nsq/go.mod

@@ -0,0 +1,8 @@
+module github.com/kedacore/test-tools/e2e/images/nsq
+
+go 1.22.0
+
+require (
+	github.com/golang/snappy v0.0.1 // indirect
+	github.com/nsqio/go-nsq v1.1.0 // indirect
+)

e2e/images/nsq/go.sum

@@ -0,0 +1,4 @@
+github.com/golang/snappy v0.0.1 h1:Qgr9rKW7uDUkrbSmQeiDsGa8SjGyCOGtuasMWwvp2P4=
+github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/nsqio/go-nsq v1.1.0 h1:PQg+xxiUjA7V+TLdXw7nVrJ5Jbl3sN86EhGCQj4+FYE=
+github.com/nsqio/go-nsq v1.1.0/go.mod h1:vKq36oyeVXgsS5Q8YEO7WghqidAVXQlcFxzQbQTuDEY=

e2e/images/nsq/main.go

@@ -0,0 +1,100 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/nsqio/go-nsq"
+)
+
+type Handler struct{}
+
+func (h *Handler) HandleMessage(m *nsq.Message) error {
+	log.Printf("Received message: %s", m.Body)
+	return nil
+}
+
+func nsqConsumer(config *nsq.Config, nsqlookupdHTTPAddress, topic, channel string) error {
+	consumer, err := nsq.NewConsumer(topic, channel, config)
+	if err != nil {
+		return err
+	}
+
+	consumer.AddHandler(&Handler{})
+
+	err = consumer.ConnectToNSQLookupd(nsqlookupdHTTPAddress)
+	if err != nil {
+		return err
+	}
+
+	sigChan := make(chan os.Signal, 1)
+	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
+	<-sigChan
+
+	consumer.Stop()
+
+	return nil
+}
+
+func nsqProducer(config *nsq.Config, nsqdTCPAddress string, topic string, messageCount int) error {
+	producer, err := nsq.NewProducer(nsqdTCPAddress, config)
+	if err != nil {
+		return err
+	}
+
+	responseChan := make(chan *nsq.ProducerTransaction, messageCount)
+	for i := 0; i < messageCount; i++ {
+		err := producer.PublishAsync(topic, []byte(fmt.Sprintf("%d", i)), responseChan)
+		if err != nil {
+			return err
+		}
+	}
+
+	for i := 0; i < messageCount; i++ {
+		trans := <-responseChan
+		if trans.Error != nil {
+			return trans.Error
+		}
+	}
+
+	producer.Stop()
+
+	return nil
+}
+
+func main() {
+	mode := flag.String("mode", "", "consumer or producer")
+	topic := flag.String("topic", "", "topic name")
+	channel := flag.String("channel", "", "channel name")
+	nsqlookupdHTTPAddress := flag.String("nsqlookupd-http-address", "", "nsqlookupd HTTP address")
+	messageCount := flag.Int("message-count", 1, "number of messages to send")
+	nsqdTCPAddress := flag.String("nsqd-tcp-address", "", "nsqd TCP address")
+	flag.Parse()
+
+	config := nsq.NewConfig()
+
+	switch *mode {
+	case "consumer":
+		log.Println("Consumer mode")
+		if *topic == "" || *channel == "" || *nsqlookupdHTTPAddress == "" {
+			log.Fatalf("topic, channel, and nsqlookupd-http-address are required\n")
+		}
+		if err := nsqConsumer(config, *nsqlookupdHTTPAddress, *topic, *channel); err != nil {
+			log.Fatalf("read from nsq failed: %w\n", err)
+		}
+	case "producer":
+		log.Println("Producer mode")
+		if *topic == "" || *nsqdTCPAddress == "" {
+			log.Fatalf("topic and nsqd-tcp-address are required\n")
+		}
+		if err := nsqProducer(config, *nsqdTCPAddress, *topic, *messageCount); err != nil {
+			log.Fatalf("write to nsq failed: %w\n", err)
+		}
+	default:
+		log.Fatalf("unknown mode: %s\n", *mode)
+	}
+}