[GitHub] [skywalking] wu-sheng commented on a change in pull request #6398: Meter system enhancement

[GitBox <gi...@apache.org>]

wu-sheng commented on a change in pull request #6398:
URL: https://github.com/apache/skywalking/pull/6398#discussion_r579023850



##########
File path: oap-server/server-core/src/main/java/org/apache/skywalking/oap/server/core/analysis/meter/MeterSystem.java
##########
@@ -187,6 +187,21 @@ public MeterSystem(final ModuleManager manager) {
             throw new IllegalArgumentException("Function " + functionName + " can't be found by javaassist.");
         }
         final String className = formatName(metricsName);
+
+        /**
+         * Check whether the metrics class is already defined or not
+         */
+        try {
+            CtClass alreadyMetric = classPool.get(METER_CLASS_PACKAGE + className);
+            if (alreadyMetric.getSuperclass() != parentClass || type != meterPrototypes.get(metricsName).getScopeType()) {

Review comment:
       `!=` -> `equals`?




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