feat: Support Azure SB for publishmq

build/dev/azure/config.json

@@ -32,6 +32,15 @@
               }
             ]
           },
+          // publishmq
+          {
+            "Name": "outpost-publish",
+            "Subscriptions": [
+              {
+                "Name": "outpost-publish-sub"
+              }
+            ]
+          },
 
           // tests
           {

cmd/publish/declare_handler.go

@@ -10,6 +10,8 @@ func handleDeclare(w http.ResponseWriter, r *http.Request) {
 	switch r.URL.Query().Get("method") {
 	case "aws_sqs":
 		err = declareAWS()
+	case "azure_servicebus":
+		err = declareAzureServiceBus()
 	case "gcp_pubsub":
 		err = declareGCP()
 	case "rabbitmq":

cmd/publish/publish_azure.go

@@ -0,0 +1,58 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+
+	"github.com/Azure/azure-sdk-for-go/sdk/messaging/azservicebus"
+)
+
+const (
+	AzureServiceBusConnectionString = "Endpoint=sb://localhost;SharedAccessKeyName=RootManageSharedAccessKey;SharedAccessKey=SAS_KEY_VALUE;UseDevelopmentEmulator=true;"
+	AzureServiceBusTopic            = "outpost-publish"
+	AzureServiceBusSubscription     = "outpost-publish-sub"
+)
+
+func publishAzureServiceBus(body map[string]interface{}) error {
+	log.Printf("[x] Publishing Azure Service Bus")
+
+	ctx := context.Background()
+	client, err := azservicebus.NewClientFromConnectionString(AzureServiceBusConnectionString, nil)
+	if err != nil {
+		return fmt.Errorf("failed to create Azure Service Bus client: %w", err)
+	}
+	defer client.Close(ctx)
+
+	sender, err := client.NewSender(AzureServiceBusTopic, nil)
+	if err != nil {
+		return fmt.Errorf("failed to create sender: %w", err)
+	}
+	defer sender.Close(ctx)
+
+	messageBody, err := json.Marshal(body)
+	if err != nil {
+		return err
+	}
+
+	message := &azservicebus.Message{
+		Body: messageBody,
+		ApplicationProperties: map[string]interface{}{
+			"source": "outpost-publish",
+		},
+	}
+
+	err = sender.SendMessage(ctx, message, nil)
+	if err != nil {
+		return fmt.Errorf("failed to send message: %w", err)
+	}
+
+	log.Printf("[x] Published message to Azure Service Bus topic %s", AzureServiceBusTopic)
+	return nil
+}
+
+func declareAzureServiceBus() error {
+	log.Printf("[*] Declaring Azure Service Bus Publish infra")
+	return fmt.Errorf("azure sb emulator does not support declaring topics and subscriptions. Use `%s` and `%s` for the publishmq topic and subscription", AzureServiceBusTopic, AzureServiceBusSubscription)
+}

cmd/publish/publish_handler.go

@@ -17,6 +17,8 @@ func handlePublish(w http.ResponseWriter, r *http.Request) {
 	switch r.URL.Query().Get("method") {
 	case "aws_sqs":
 		err = publishAWS(body)
+	case "azure_servicebus":
+		err = publishAzureServiceBus(body)
 	case "gcp_pubsub":
 		err = publishGCP(body)
 	case "rabbitmq":

internal/config/publishmq.go

@@ -14,6 +14,12 @@ type PublishAWSSQSConfig struct {
 	Queue           string `yaml:"queue" env:"PUBLISH_AWS_SQS_QUEUE" desc:"Name of the SQS queue for publishing events. Required if AWS SQS is the chosen publish MQ provider." required:"C"`
 }
 
+type PublishAzureServiceBusConfig struct {
+	ConnectionString string `yaml:"connection_string" env:"PUBLISH_AZURE_SERVICEBUS_CONNECTION_STRING" desc:"Azure Service Bus connection string for the publish queue. Required if Azure Service Bus is the chosen publish MQ provider." required:"C"`
+	Topic            string `yaml:"topic" env:"PUBLISH_AZURE_SERVICEBUS_TOPIC" desc:"Name of the Azure Service Bus topic for publishing events. Required if Azure Service Bus is the chosen publish MQ provider." required:"C"`
+	Subscription     string `yaml:"subscription" env:"PUBLISH_AZURE_SERVICEBUS_SUBSCRIPTION" desc:"Name of the Azure Service Bus subscription to read published events from. Required if Azure Service Bus is the chosen publish MQ provider." required:"C"`
+}
+
 type PublishGCPPubSubConfig struct {
 	Project                   string `yaml:"project" env:"PUBLISH_GCP_PUBSUB_PROJECT" desc:"GCP Project ID for the Pub/Sub publish topic. Required if GCP Pub/Sub is the chosen publish MQ provider." required:"C"`
 	Topic                     string `yaml:"topic" env:"PUBLISH_GCP_PUBSUB_TOPIC" desc:"Name of the GCP Pub/Sub topic for publishing events. Required if GCP Pub/Sub is the chosen publish MQ provider." required:"C"`
@@ -28,15 +34,19 @@ type PublishRabbitMQConfig struct {
 }
 
 type PublishMQConfig struct {
-	AWSSQS    PublishAWSSQSConfig    `yaml:"aws_sqs" desc:"Configuration for using AWS SQS as the publish message queue. Only one publish MQ provider should be configured." required:"N"`
-	GCPPubSub PublishGCPPubSubConfig `yaml:"gcp_pubsub" desc:"Configuration for using GCP Pub/Sub as the publish message queue. Only one publish MQ provider should be configured." required:"N"`
-	RabbitMQ  PublishRabbitMQConfig  `yaml:"rabbitmq" desc:"Configuration for using RabbitMQ as the publish message queue. Only one publish MQ provider should be configured." required:"N"`
+	AWSSQS          PublishAWSSQSConfig          `yaml:"aws_sqs" desc:"Configuration for using AWS SQS as the publish message queue. Only one publish MQ provider should be configured." required:"N"`
+	AzureServiceBus PublishAzureServiceBusConfig `yaml:"azure_servicebus" desc:"Configuration for using Azure Service Bus as the publish message queue. Only one publish MQ provider should be configured." required:"N"`
+	GCPPubSub       PublishGCPPubSubConfig       `yaml:"gcp_pubsub" desc:"Configuration for using GCP Pub/Sub as the publish message queue. Only one publish MQ provider should be configured." required:"N"`
+	RabbitMQ        PublishRabbitMQConfig        `yaml:"rabbitmq" desc:"Configuration for using RabbitMQ as the publish message queue. Only one publish MQ provider should be configured." required:"N"`
 }
 
 func (c PublishMQConfig) GetInfraType() string {
 	if hasPublishAWSSQSConfig(c.AWSSQS) {
 		return "awssqs"
 	}
+	if hasPublishAzureServiceBusConfig(c.AzureServiceBus) {
+		return "azureservicebus"
+	}
 	if hasPublishGCPPubSubConfig(c.GCPPubSub) {
 		return "gcppubsub"
 	}
@@ -59,6 +69,14 @@ func (c *PublishMQConfig) GetQueueConfig() *mqs.QueueConfig {
 				Topic:                     c.AWSSQS.Queue,
 			},
 		}
+	case "azureservicebus":
+		return &mqs.QueueConfig{
+			AzureServiceBus: &mqs.AzureServiceBusConfig{
+				ConnectionString: c.AzureServiceBus.ConnectionString,
+				Topic:            c.AzureServiceBus.Topic,
+				Subscription:     c.AzureServiceBus.Subscription,
+			},
+		}
 	case "gcppubsub":
 		return &mqs.QueueConfig{
 			GCPPubSub: &mqs.GCPPubSubConfig{
@@ -86,6 +104,10 @@ func hasPublishAWSSQSConfig(config PublishAWSSQSConfig) bool {
 		config.SecretAccessKey != "" && config.Region != ""
 }
 
+func hasPublishAzureServiceBusConfig(config PublishAzureServiceBusConfig) bool {
+	return config.ConnectionString != "" && config.Topic != "" && config.Subscription != ""
+}
+
 func hasPublishGCPPubSubConfig(config PublishGCPPubSubConfig) bool {
 	return config.Project != ""
 }