Axon框架中的Axon Saga可以是异步的也可以是同步的，具体取决于你在设计和实现时的需求和偏好。下面给出了两种解决方法的示例代码。

1. 异步Axon Saga：

// 定义一个异步的Axon Saga
@Saga
public class MySaga {
    
    @Autowired
    private transient CommandGateway commandGateway;

    @StartSaga
    @SagaEventHandler(associationProperty = "orderId")
    public void handle(OrderPlacedEvent event) {
        // 处理OrderPlacedEvent并发送异步命令
        SomeCommand command = new SomeCommand(event.getOrderId());
        commandGateway.send(command, LoggingCallback.INSTANCE);
    }

    @SagaEventHandler(associationProperty = "orderId")
    public void handle(SomeEvent event) {
        // 处理SomeEvent并发送异步命令
        AnotherCommand command = new AnotherCommand(event.getSomeData());
        commandGateway.send(command, LoggingCallback.INSTANCE);
    }

    @EndSaga
    @SagaEventHandler(associationProperty = "orderId")
    public void handle(AnotherEvent event) {
        // 处理AnotherEvent并结束Saga
    }
}

2. 同步Axon Saga：

// 定义一个同步的Axon Saga
@Saga
public class MySaga {
    
    @Autowired
    private transient CommandGateway commandGateway;

    @StartSaga
    @SagaEventHandler(associationProperty = "orderId")
    public void handle(OrderPlacedEvent event) {
        // 处理OrderPlacedEvent并发送同步命令
        SomeCommand command = new SomeCommand(event.getOrderId());
        commandGateway.sendAndWait(command);
    }

    @SagaEventHandler(associationProperty = "orderId")
    public void handle(SomeEvent event) {
        // 处理SomeEvent并发送同步命令
        AnotherCommand command = new AnotherCommand(event.getSomeData());
        commandGateway.sendAndWait(command);
    }

    @EndSaga
    @SagaEventHandler(associationProperty = "orderId")
    public void handle(AnotherEvent event) {
        // 处理AnotherEvent并结束Saga
    }
}

在上述代码示例中，CommandGateway用于发送命令，LoggingCallback用于处理命令发送结果。异步Axon Saga使用send方法发送命令并提供一个回调函数，而同步Axon Saga使用sendAndWait方法发送命令并等待返回结果。根据实际需求，选择适合的方式来实现Axon Saga。