sashapolo commented on code in PR #892:
URL: https://github.com/apache/ignite-3/pull/892#discussion_r905893858


##########
modules/storage-page-memory/src/main/java/org/apache/ignite/internal/storage/pagememory/AbstractPageMemoryDataRegion.java:
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@@ -17,24 +17,24 @@
 
 package org.apache.ignite.internal.storage.pagememory;
 
-import java.util.Objects;
 import org.apache.ignite.internal.manager.IgniteComponent;
+import org.apache.ignite.internal.pagememory.DataRegion;
 import org.apache.ignite.internal.pagememory.PageMemory;
-import org.apache.ignite.internal.pagememory.PageMemoryDataRegion;
-import 
org.apache.ignite.internal.pagememory.configuration.schema.PageMemoryDataRegionConfiguration;
+import 
org.apache.ignite.internal.pagememory.configuration.schema.BasePageMemoryDataRegionConfiguration;
 import org.apache.ignite.internal.pagememory.io.PageIoRegistry;
+import org.apache.ignite.internal.storage.StorageException;
 
 /**
  * Abstract data region for {@link PageMemoryStorageEngine}. Based on a {@link 
PageMemory}.
  */
-abstract class AbstractPageMemoryDataRegion implements PageMemoryDataRegion, 
IgniteComponent {
-    protected final PageMemoryDataRegionConfiguration cfg;
+abstract class AbstractPageMemoryDataRegion<T extends PageMemory> implements 
DataRegion<T>, IgniteComponent {

Review Comment:
   Because it breaks the intention of this interface. IgniteComponents have 
their own lifecycle and are managed by the `LifecycleManager`. Anyway, why do 
you need an interface to have `start` and `stop` methods? What's wrong with 
declaring them in this class directly?



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