nizhikov commented on a change in pull request #6845: IGNITE-12145: Monitoring 
list engine.
URL: https://github.com/apache/ignite/pull/6845#discussion_r323628460
 
 

 ##########
 File path: 
modules/core/src/main/java/org/apache/ignite/internal/processors/metric/GridMetricManager.java
 ##########
 @@ -265,45 +378,116 @@ public MetricRegistry registry(String name) {
         return registries.computeIfAbsent(name, n -> {
             MetricRegistry mreg = new MetricRegistry(name, log);
 
-            notifyListeners(mreg, metricRegCreationLsnrs);
+            notifyListeners(mreg, metricRegCreationLsnrs, log);
 
             return mreg;
         });
     }
 
-    /** {@inheritDoc} */
-    @NotNull @Override public Iterator<MetricRegistry> iterator() {
-        return registries.values().iterator();
+    public <R extends MonitoringRow, D> void list(String name, String 
description,
+        Class<R> rowClazz, Supplier<ConcurrentMap<?, D>> data, Function<D, R> 
rowFunc, Consumer<D> clearer) {
+
+        Supplier<MonitoringList<R>> listCreator = () -> list(name, () -> new 
MonitoringListAdapter<>(name,
+            description,
+            rowClazz,
+            (MonitoringRowAttributeWalker<R>)walkers.get(rowClazz),
+            data.get(),
+            rowFunc));
+
+        //Create new instance of the list.
+        listCreator.get();
+
+        ctx.metric().addEnableListListener(listenOnlyEqual(name, identity(), n 
-> listCreator.get()));
 
 Review comment:
   OK, fixed.

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