Updated ClassCastException handling and error message

Author: Anil Konakalla

src/main/java/com/avioconsulting/mule/logger/internal/config/CustomLoggerConfiguration.java

@@ -385,7 +385,7 @@ public void initialise() throws InitialisationException {
           && flowLogConfig.getAttributesExpressionText() == null) {
         try {
           throw new InitialisationException(createStaticMessage(
-              "One of attributesExpressionText or messageExpressionText must be defined in flow-logs-config"),
+              "Both 'attributesExpressionText' and 'messageExpressionText' cannot be empty, at least one or both must be specified."),
               this);
         } catch (InitialisationException e) {
           throw new RuntimeException(e);

src/main/java/com/avioconsulting/mule/logger/internal/listeners/CustomLoggerPipelineNotificationListener.java

@@ -74,13 +74,10 @@ public void onNotification(PipelineMessageNotification notification) {
         logMessage(notification.getComponent().getLocation(), notification.getEvent(), message,
             config.getFlowCategorySuffix(),
             config.getFlowLogLevel(), flowLogAttributes);
+      } catch (ClassCastException castException) {
+        classLogger.error("Message expression text in flow-log-config needs to be a String", castException);
       } catch (Exception e) {
-        if (e.getClass().getName().equals("java.lang.ClassCastException")
-            || e.getClass().getName().equals("ClassCastException")) {
-          classLogger.error("Message expression text in flow-log-config needs to be a String", e);
-        } else {
-          classLogger.error("Error processing flow notification", e);
-        }
+        classLogger.error("Error processing flow notification", e);
       }
     } else {
       classLogger.warn(