SubscriptionResponseStatusDrop means warning is logged and message is dropped.

SubscriptionResponseStatusRetry means message to be retried by Dapr.

SubscriptionResponseStatusSuccess means message is processed successfully.

BindingEvent represents the binding event handler input.

Content is a generic data content.

InvocationEvent represents the input and output of binding invocation.

Subscription represents single topic subscription.

SubscriptionResponse represents the response handling hint from subscriber to Dapr.

TopicEvent is the content of the inbound topic message.

Service represents Dapr callback service.