sashapolo commented on code in PR #6685:
URL: https://github.com/apache/ignite-3/pull/6685#discussion_r2768682696
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modules/storage-page-memory/src/main/java/org/apache/ignite/internal/storage/pagememory/AbstractPageMemoryStorageEngine.java:
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@@ -17,26 +17,173 @@
package org.apache.ignite.internal.storage.pagememory;
+import static java.util.Comparator.comparing;
+import static
org.apache.ignite.internal.util.IgniteUtils.lexicographicListComparator;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.ConcurrentSkipListMap;
import java.util.concurrent.atomic.AtomicLong;
+import org.apache.ignite.internal.catalog.descriptors.CatalogColumnCollation;
+import org.apache.ignite.internal.configuration.SystemLocalConfiguration;
+import org.apache.ignite.internal.configuration.SystemPropertyView;
import org.apache.ignite.internal.hlc.HybridClock;
import org.apache.ignite.internal.pagememory.PageMemory;
import org.apache.ignite.internal.pagememory.tree.BplusTree;
+import org.apache.ignite.internal.storage.StorageException;
import org.apache.ignite.internal.storage.engine.StorageEngine;
+import org.apache.ignite.internal.storage.index.StorageSortedIndexDescriptor;
+import
org.apache.ignite.internal.storage.index.StorageSortedIndexDescriptor.StorageSortedIndexColumnDescriptor;
+import
org.apache.ignite.internal.storage.pagememory.index.sorted.comparator.JitComparator;
+import
org.apache.ignite.internal.storage.pagememory.index.sorted.comparator.JitComparatorGenerator;
+import
org.apache.ignite.internal.storage.pagememory.index.sorted.comparator.JitComparatorOptions;
+import org.apache.ignite.internal.type.NativeType;
+import org.jetbrains.annotations.Nullable;
+import org.jetbrains.annotations.VisibleForTesting;
/** Abstract implementation of the storage engine based on memory {@link
PageMemory}. */
public abstract class AbstractPageMemoryStorageEngine implements StorageEngine
{
+ public static final String
LEGACY_PAGE_MEMERY_SORTED_INDEX_COMPARATOR_PROPERTY =
"legacyPageMemorySortedIndexComparator";
+
+ protected final @Nullable SystemLocalConfiguration systemLocalConfig;
+
private final HybridClock clock;
+ private boolean useLegacySortedIndexComparator = false;
+
+ /**
+ * This map is used to reuse comparators for sorted indexes with the same
set of columns and their collations. It is beneficial to reuse
+ * comparators because otherwise every comparator will use its own
generated class, which bloats metaspace and doesn't allow JVM's JIT
+ * to be as efficient.
+ */
+ private final ConcurrentMap<StorageSortedIndexDescriptor,
CachedComparator> cachedSortedIndexComparators
+ = new ConcurrentSkipListMap<>(comparing(
Review Comment:
> Java's HashMaps don't support custom hash/equals functions
What do you mean? You implement hashCode and equals yourself
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