Handling Queries

Writing Query Handler
In Ecotone, an object may declare a number of query handler methods, by annotating them with the @QueryHandler annotation. 
Class Routing
For a query handler method, the first declared parameter defines which query message object it will receive.
use Ecotone\Messaging\Annotation\MessageEndpoint;
use Ecotone\Modelling\Annotation\QueryHandler;
​
/**
 * @MessageEndpoint()
 */
class OrderSummary
{
    /**
     * @QueryHandler()
     */
    public function getOrders(GetOrdersQuery $query) : array
    {
        //return orders
    }
}
Name Routing
To route Message to @QueryHandler by name we can use inputChannelName. 
In below example Message will be routed by order.getOrders.   
use Ecotone\Messaging\Annotation\MessageEndpoint;
use Ecotone\Modelling\Annotation\QueryHandler;
​
/**
 * @MessageEndpoint()
 */
class OrderSummary
{
    /**
     * @QueryHandler(inputChannelName="order.getOrders")
     */
    public function getOrders(GetOrdersQuery $query) : array
    {
        //return orders
    }
}
Query can be anything class/scalar/array as long as Ecotone does know how to convert it. 
Read more in Method Invocation and Conversion​
​

Modelling - Previous

Query Handling

Dispatching Queries

Last updated 10 months ago

Handling Queries

Writing Query Handler

Class Routing

Name Routing

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