jeantil commented on code in PR #2696:
URL: https://github.com/apache/james-project/pull/2696#discussion_r2023550113


##########
server/mailet/mailetcontainer-impl/src/main/java/org/apache/james/mailetcontainer/lib/AbstractStateCompositeProcessor.java:
##########
@@ -151,13 +150,17 @@ private void checkProcessors() throws 
ConfigurationException {
         }
     }
 
-    private Stream<ProcessingState> requiredProcessorStates(Mailet mailet) {
-        return Stream.concat(mailet.requiredProcessingState().stream(),
-            Stream.of(
-                    mailet.onMailetException(),
-                    mailet.onMatchException())
-                .flatMap(Optional::stream)
-                .map(ProcessingState::new));
+    private Stream<ProcessingState> requiredProcessorStates(MatcherMailetPair 
matcherMailetPair) {
+        var mailet = matcherMailetPair.getMailet();
+
+        return Stream.concat(
+                mailet.requiredProcessingState().stream(),
+                Stream.of(
+                                matcherMailetPair.onMailetException(),
+                                matcherMailetPair.onMatchException()
+                        ).flatMap(Optional::stream)
+                        .map(ProcessingState::new)
+        );

Review Comment:
   don't be sorry, byt I'm not sure I understand your comment/suggestion. 
   
   I find that clearly separating scopes in stream pipelines is much easier to 
read. I put the closing parens on line 160 and 163 on the next line on purpose 
to clearly align the scope nmarkers
   
   Your propose change is much more compact but the visual scoping is lost. 



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