middleware change

adr/2021_05_06_command_bus_unification.md

@@ -5,20 +5,7 @@
 
 ## Context and Problem Statement
 
-We had 7 different names of buses across all sylius products, we decided to unify them.
+Sylius and any other following product (like plugins) should utilize `sylius.command_bus` for command dispatching and `sylius.event_bus` for events.
 
-## Considered Options
-
-### Leaving different buses as it was till now
-
-* Good, because it doesnt require much work
-* Bad, because we need to keep track of all available buses
-
-### Unifying buses across all products
-
-* Good, because we will have only few buses to keep track of
-* Bad, because potential bc break
-
-## Decision Outcome
-
-Chosen option: Unifying buses across all products, it allows us stick to one bus naming style
+Take into account, that the command bus requires to have one corresponding handler for each message dispatched in contradiction to the event bus(where there is no such requirement). 
+In addition, the command bus will perform command validation and wrap the following handler within a transaction and flush to the database. 

src/Sylius/Bundle/ApiBundle/Resources/config/app/config.yaml

@@ -34,19 +34,23 @@ framework:
     messenger:
         buses:
             sylius.command_bus: &command_bus
-                default_middleware: allow_no_handlers
+                middleware:
+                    - 'validation'
+                    - 'doctrine_transaction'
             sylius.event_bus: &event_bus
-                default_middleware: allow_no_handlers
+                middleware:
+                    - 'validation'
+                    - 'doctrine_transaction'
             sylius_default.bus: *command_bus
             sylius_event.bus: *event_bus
             
 services:
     sylius_default.bus:
         deprecated: 'The "%service_id%" service alias is deprecated.'
-        synthetic: true
+        abstract: true
     sylius_event.bus:
         deprecated: 'The "%service_id%" service alias is deprecated.'
-        synthetic: true
+        abstract: true
 
 lexik_jwt_authentication:
     token_extractors: