Activity Publish Event Action Node

Publish Event Action Node

A Publish Event Action Node generates a typed notification and publishes it from the current behavior. It is useful when other behaviors or subscribers should observe an event without choosing a single target behavior. In a UML Activity it is an action that sends a signal.

Definition

Use the generic event overload to construct the notification; its outgoing control flow continues after publication:

public sealed record OrderDispatched(string OrderId);

The following fragment belongs inside the relevant method or builder callback:

.AddPublishEventAction<OrderDispatched>(
    "PublishDispatch",
    async c => new OrderDispatched(
        c.GetTokensOfType<string>().Single()),
    node => node.AddControlFlow("Continue"))
.AddAction("Continue", async c =>
    await audit.RecordAsync("dispatch-published", c.CancellationToken))

The publish action does not select a BehaviorId or return an application token to the local graph. Use Send Event Action Node for a directed send to one behavior, or Accept Event Action Node to handle an incoming event.