Slide 70
Slide 70 text
public class OrderManagementSaga {
private boolean paid = false;
private boolean delivered = false;
@Inject
private transient CommandGateway commandGateway;
@StartSaga
@SagaEventHandler(associationProperty = "orderId")
public void handle(OrderCreatedEvent event) {
// client generated identifiers
ShippingId shipmentId = createShipmentId();
InvoiceId invoiceId = createInvoiceId();
// associate the Saga with these values, before sending the commands
SagaLifecycle.associateWith("shipmentId", shipmentId);
SagaLifecycle.associateWith("invoiceId", invoiceId);
// send the commands
commandGateway.send(new PrepareShippingCommand(...));
commandGateway.send(new CreateInvoiceCommand(...));
}
@SagaEventHandler(associationProperty = "shipmentId")
public void handle(ShippingArrivedEvent event) {
delivered = true;
if (paid) { SagaLifecycle.end(); }
}
@SagaEventHandler(associationProperty = "invoiceId")
public void handle(InvoicePaidEvent event) {
paid = true;
if (delivered) { SagaLifecycle.end(); }
}
// ...
}
Reactive
Policy