snapshot of https://github.com/ThreeDotsLabs/watermill.git (master, 2026-09-15; blobs > 131072B omitted)

_examples/pubsubs/amqp/main.go

@@ -0,0 +1,67 @@
+// Sources for https://watermill.io/learn/getting-started/
+package main
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"github.com/ThreeDotsLabs/watermill"
+	"github.com/ThreeDotsLabs/watermill-amqp/v3/pkg/amqp"
+	"github.com/ThreeDotsLabs/watermill/message"
+)
+
+var amqpURI = "amqp://guest:guest@rabbitmq:5672/"
+
+func main() {
+	amqpConfig := amqp.NewDurableQueueConfig(amqpURI)
+
+	subscriber, err := amqp.NewSubscriber(
+		// This config is based on this example: https://www.rabbitmq.com/tutorials/tutorial-two-go.html
+		// It works as a simple queue.
+		//
+		// If you want to implement a Pub/Sub style service instead, check
+		// https://watermill.io/pubsubs/amqp/#amqp-consumer-groups
+		amqpConfig,
+		watermill.NewStdLogger(false, false),
+	)
+	if err != nil {
+		panic(err)
+	}
+
+	messages, err := subscriber.Subscribe(context.Background(), "example.topic")
+	if err != nil {
+		panic(err)
+	}
+
+	go process(messages)
+
+	publisher, err := amqp.NewPublisher(amqpConfig, watermill.NewStdLogger(false, false))
+	if err != nil {
+		panic(err)
+	}
+
+	publishMessages(publisher)
+}
+
+func publishMessages(publisher message.Publisher) {
+	for {
+		msg := message.NewMessage(watermill.NewUUID(), []byte("Hello, world!"))
+
+		if err := publisher.Publish("example.topic", msg); err != nil {
+			panic(err)
+		}
+
+		time.Sleep(time.Second)
+	}
+}
+
+func process(messages <-chan *message.Message) {
+	for msg := range messages {
+		log.Printf("received message: %s, payload: %s", msg.UUID, string(msg.Payload))
+
+		// we need to Acknowledge that we received and processed the message,
+		// otherwise, it will be resent over and over again.
+		msg.Ack()
+	}
+}