commandGateway.send() from handle() of @SagaEventHandler in @Saga class in not sending the command

Axon Server
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1

I am using Axon framework 4.8.0.
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@Autowired
private transient CommandGateway commandGateway;

@StartSaga
@SagaEventHandler(associationProperty = "orderId")
public void handle(OrderCreatedEvent orderCreatedEvent){
    ReserveProductCommand reserveProductCommand = ReserveProductCommand.builder()
            .orderId(orderCreatedEvent.getOrderId())
            .productId(orderCreatedEvent.getProductId())
            .quantity(orderCreatedEvent.getQuantity())
            .userId(orderCreatedEvent.getUserId())
            .build();

    log.info("OrderCreatedEvent handled for orderId : "+reserveProductCommand.getOrderId()+
            " and ProductId : "+reserveProductCommand.getProductId());

    commandGateway.send(reserveProductCommand);
}

From the above code snippet, when commandGateway.send(reserveProductCommand) is called, ReserveProductCommand is not being invoked. Need assistance to understand the situation and reasons to proceed with other Saga Event Handlers.

2

Hi Kumar,

Could you switch to sendAndWait and log the return value or use the send with a callback to get more information? It could be many things. I assume you have an aggregate somewhere for handling the ReserveProductCommand.

Can you also maybe expand on why you want to use a Saga? It might not be needed as there might be better scalable solutions to achieve the same thing.