ActivityHandler

abstract interface class ActivityHandler<I, O> {
  Future<O> handle(ActivityContext context, I input);
}

ActivityHandler.from((context, input) async => ...) is the function form. Bind handlers in a WorkflowModule with ActivityBinding.from.

ActivityContext provides:

• runId, commandId, operationKey, attempt
• idempotencyKey
• heartbeat()

Graph TaskExecutor and TaskSuccess / TaskFailure effects are legacy.

See Also

• Service Tasks
• Activity Handlers