Writing Query Handler

In Ecotone, an object may declare a number of query handler methods, by annotating them with the #[QueryHandler] attribute.

Class Routing

For a query handler method, the first declared parameter defines which query message object it will receive.

class OrderSummary
{
    #[QueryHandler] 
    public function getOrders(GetOrdersQuery $query) : array
    {
        //return orders
    }
}

Name Routing

To route Message to @QueryHandler by name we can use routing. In below example Message will be routed by order.getOrders.

use Ecotone\Modelling\Annotation\QueryHandler;
​
class OrderSummary
{
    #[QueryHandler("order.getOrders")] 
    public function getOrders(GetOrdersQuery $query) : array
    {
        //return orders
    }
}

​