Azure Event Grid event schema for Service Bus

  • 2 minutes to read
  • Contributors
    • Bahram Banisadr
    • Sreedhar Pelluru
    • Tom FitzMacken

This article provides the properties and schema for Service Bus events. For an introduction to event schemas, see Azure Event Grid event schema.

For a list of sample scripts and tutorials, see Service Bus event source.

Available event types

Service Bus emits the following event types:

Event type Description
Microsoft.ServiceBus.ActiveMessagesAvailableWithNoListeners Raised when there are active messages in a Queue or Subscription and no receivers listening.
Microsoft.ServiceBus.DeadletterMessagesAvailableWithNoListener Raised when there are active messages in a Dead Letter Queue and no active listeners.

Example event

The following example shows the schema of active messages with no listeners event:

[{
  "topic": "/subscriptions/{subscription-id}/resourcegroups/{your-rg}/providers/Microsoft.ServiceBus/namespaces/{your-service-bus-namespace}",
  "subject": "topics/{your-service-bus-topic}/subscriptions/{your-service-bus-subscription}",
  "eventType": "Microsoft.ServiceBus.ActiveMessagesAvailableWithNoListeners",
  "eventTime": "2018-02-14T05:12:53.4133526Z",
  "id": "dede87b0-3656-419c-acaf-70c95ddc60f5",
  "data": {
    "namespaceName": "YOUR SERVICE BUS NAMESPACE WILL SHOW HERE",
    "requestUri": "https://{your-service-bus-namespace}.servicebus.windows.net/{your-topic}/subscriptions/{your-service-bus-subscription}/messages/head",
    "entityType": "subscriber",
    "queueName": "QUEUE NAME IF QUEUE",
    "topicName": "TOPIC NAME IF TOPIC",
    "subscriptionName": "SUBSCRIPTION NAME"
  },
  "dataVersion": "1",
  "metadataVersion": "1"
}]

The schema for a dead letter queue event is similar:

[{
  "topic": "/subscriptions/{subscription-id}/resourcegroups/{your-rg}/providers/Microsoft.ServiceBus/namespaces/{your-service-bus-namespace}",
  "subject": "topics/{your-service-bus-topic}/subscriptions/{your-service-bus-subscription}",
  "eventType": "Microsoft.ServiceBus.DeadletterMessagesAvailableWithNoListener",
  "eventTime": "2018-02-14T05:12:53.4133526Z",
  "id": "dede87b0-3656-419c-acaf-70c95ddc60f5",
  "data": {
    "namespaceName": "YOUR SERVICE BUS NAMESPACE WILL SHOW HERE",
    "requestUri": "https://{your-service-bus-namespace}.servicebus.windows.net/{your-topic}/subscriptions/{your-service-bus-subscription}/$deadletterqueue/messages/head",
    "entityType": "subscriber",
    "queueName": "QUEUE NAME IF QUEUE",
    "topicName": "TOPIC NAME IF TOPIC",
    "subscriptionName": "SUBSCRIPTION NAME"
  },
  "dataVersion": "1",
  "metadataVersion": "1"
}]

Event properties

An event has the following top-level data:

Property Type Description
topic string Full resource path to the event source. This field is not writeable. Event Grid provides this value.
subject string Publisher-defined path to the event subject.
eventType string One of the registered event types for this event source.
eventTime string The time the event is generated based on the provider's UTC time.
id string Unique identifier for the event.
data object Blob storage event data.
dataVersion string The schema version of the data object. The publisher defines the schema version.
metadataVersion string The schema version of the event metadata. Event Grid defines the schema of the top-level properties. Event Grid provides this value.

The data object has the following properties:

Property Type Description
namespaceName string The Service Bus namespace the resource exists in.
requestUri string The URI to the specific queue or subscription emitting the event.
entityType string The type of Service Bus entity emitting events (queue or subscription).
queueName string The queue with active messages if subscribing to a queue. Value null if using topics / subscriptions.
topicName string The topic the Service Bus subscription with active messages belongs to. Value null if using a queue.
subscriptionName string The Service Bus subscription with active messages. Value null if using a queue.

Next steps