quantranhong1999 commented on code in PR #1707:
URL: https://github.com/apache/james-project/pull/1707#discussion_r1316805533


##########
server/protocols/webadmin/webadmin-mailbox/src/main/java/org/apache/james/webadmin/routes/UserQuotaRoutes.java:
##########
@@ -99,17 +101,22 @@ private static Optional<Integer> intQueryParameter(Request 
request) {
             }
         }
 
-        private static Optional<QuotaComponent> getQuotaComponent(Request 
request) {
-            String quotaComponentString = 
request.queryParams(USERS_PER_SECOND);
-            if (Objects.isNull(quotaComponentString)) {
-                return Optional.empty();
+        private static List<QuotaComponent> getQuotaComponent(Request request) 
{
+            List<QuotaComponent> quotaComponents = new ArrayList<>();
+            String[] quotaComponentStrings = 
request.queryParamsValues(QUOTA_COMPONENT);

Review Comment:
   How about something like this:
   
   ```java
               return Arrays.stream(quotaComponentStrings)
                   .map(quotaComponentString -> {
                       QuotaComponent quotaComponent = 
QUOTA_COMPONENT_MAP.get(quotaComponentString);
                       if (Objects.isNull(quotaComponent)) {
                           throw new 
IllegalArgumentException(String.format("Illegal value supplied for query 
parameter '%s' with value '%s', expecting existing " +
                               "quota components", QUOTA_COMPONENT, 
quotaComponentString));
                       }
                       return quotaComponent;
                   })
                   .collect(Collectors.toUnmodifiableList());
   ```



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