302 lines
9.8 KiB
Java
302 lines
9.8 KiB
Java
package it.cavallium.dbengine.database.collections;
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import it.cavallium.buffer.Buf;
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import it.cavallium.dbengine.client.CompositeSnapshot;
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import it.cavallium.dbengine.client.DbProgress;
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import it.cavallium.dbengine.client.SSTVerificationProgress;
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import it.cavallium.dbengine.database.LLDictionary;
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import it.cavallium.dbengine.database.SubStageEntry;
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import it.cavallium.dbengine.database.UpdateMode;
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import it.cavallium.dbengine.database.serialization.Serializer;
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import it.cavallium.dbengine.database.serialization.SerializerFixedBinaryLength;
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import it.unimi.dsi.fastutil.objects.Object2ObjectLinkedOpenHashMap;
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import it.unimi.dsi.fastutil.objects.Object2ObjectSortedMap;
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import it.unimi.dsi.fastutil.objects.ObjectArraySet;
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import java.util.Collection;
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import java.util.Collections;
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import java.util.List;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Objects;
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import java.util.Set;
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import java.util.function.Function;
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import java.util.stream.Stream;
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import org.apache.logging.log4j.LogManager;
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import org.apache.logging.log4j.Logger;
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import org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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@SuppressWarnings("unused")
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public class DatabaseMapDictionaryHashed<T, U, TH> implements DatabaseStageMap<T, U, DatabaseStageEntry<U>> {
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private static final Logger logger = LogManager.getLogger(DatabaseMapDictionaryHashed.class);
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private final Function<T, TH> keySuffixHashFunction;
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private final DatabaseMapDictionary<TH, ObjectArraySet<Entry<T, U>>> subDictionary;
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protected DatabaseMapDictionaryHashed(LLDictionary dictionary,
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@Nullable Buf prefixKeySupplier,
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Serializer<T> keySuffixSerializer,
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Serializer<U> valueSerializer,
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Function<T, TH> keySuffixHashFunction,
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SerializerFixedBinaryLength<TH> keySuffixHashSerializer) {
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var updateMode = dictionary.getUpdateMode();
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if (updateMode != UpdateMode.ALLOW) {
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throw new IllegalArgumentException("Hashed maps only works when UpdateMode is ALLOW");
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}
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ValueWithHashSerializer<T, U> valueWithHashSerializer
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= new ValueWithHashSerializer<>(keySuffixSerializer, valueSerializer);
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ValuesSetSerializer<Entry<T, U>> valuesSetSerializer
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= new ValuesSetSerializer<>(valueWithHashSerializer);
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this.subDictionary = DatabaseMapDictionary.tail(dictionary, prefixKeySupplier, keySuffixHashSerializer,
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valuesSetSerializer);
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this.keySuffixHashFunction = keySuffixHashFunction;
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}
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private DatabaseMapDictionaryHashed(Function<T, TH> keySuffixHashFunction,
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DatabaseStage<Object2ObjectSortedMap<TH, ObjectArraySet<Entry<T, U>>>> subDictionary) {
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this.keySuffixHashFunction = keySuffixHashFunction;
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this.subDictionary = (DatabaseMapDictionary<TH, ObjectArraySet<Entry<T, U>>>) subDictionary;
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}
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public static <T, U, UH> DatabaseMapDictionaryHashed<T, U, UH> simple(LLDictionary dictionary,
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Serializer<T> keySerializer,
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Serializer<U> valueSerializer,
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Function<T, UH> keyHashFunction,
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SerializerFixedBinaryLength<UH> keyHashSerializer) {
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return new DatabaseMapDictionaryHashed<>(
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dictionary,
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null,
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keySerializer,
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valueSerializer,
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keyHashFunction,
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keyHashSerializer
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);
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}
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public static <T, U, UH> DatabaseMapDictionaryHashed<T, U, UH> tail(LLDictionary dictionary,
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@Nullable Buf prefixKeySupplier,
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Serializer<T> keySuffixSerializer,
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Serializer<U> valueSerializer,
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Function<T, UH> keySuffixHashFunction,
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SerializerFixedBinaryLength<UH> keySuffixHashSerializer) {
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return new DatabaseMapDictionaryHashed<>(dictionary,
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prefixKeySupplier,
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keySuffixSerializer,
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valueSerializer,
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keySuffixHashFunction,
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keySuffixHashSerializer
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);
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}
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private Object2ObjectSortedMap<TH, ObjectArraySet<Entry<T, U>>> serializeMap(Object2ObjectSortedMap<T, U> map) {
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var newMap = new Object2ObjectLinkedOpenHashMap<TH, ObjectArraySet<Entry<T, U>>>(map.size());
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map.forEach((key, value) -> newMap.compute(keySuffixHashFunction.apply(key), (hash, prev) -> {
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if (prev == null) {
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prev = new ObjectArraySet<>();
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}
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prev.add(Map.entry(key, value));
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return prev;
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}));
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return newMap;
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}
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private Object2ObjectSortedMap<T, U> deserializeMap(Object2ObjectSortedMap<TH, ObjectArraySet<Entry<T, U>>> map) {
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var newMap = new Object2ObjectLinkedOpenHashMap<T, U>(map.size());
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map.forEach((hash, set) -> set.forEach(entry -> newMap.put(entry.getKey(), entry.getValue())));
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return newMap;
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}
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@Override
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public Object2ObjectSortedMap<T, U> get(@Nullable CompositeSnapshot snapshot) {
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var v = subDictionary.get(snapshot);
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var result = v != null ? deserializeMap(v) : null;
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return result != null && result.isEmpty() ? null : result;
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}
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@Override
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public Object2ObjectSortedMap<T, U> getOrDefault(@Nullable CompositeSnapshot snapshot,
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Object2ObjectSortedMap<T, U> defaultValue) {
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return Objects.requireNonNullElse(this.get(snapshot), defaultValue);
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}
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@Override
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public void set(Object2ObjectSortedMap<T, U> map) {
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var value = this.serializeMap(map);
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subDictionary.set(value);
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}
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@Override
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public boolean setAndGetChanged(Object2ObjectSortedMap<T, U> map) {
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return subDictionary.setAndGetChanged(this.serializeMap(map));
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}
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@Override
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public boolean clearAndGetStatus() {
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return subDictionary.clearAndGetStatus();
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}
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@Override
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public boolean isEmpty(@Nullable CompositeSnapshot snapshot) {
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return subDictionary.isEmpty(snapshot);
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}
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@Override
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public DatabaseStageEntry<Object2ObjectSortedMap<T, U>> entry() {
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return this;
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}
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@Override
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public Stream<DbProgress<SSTVerificationProgress>> verifyChecksum() {
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return this.subDictionary.verifyChecksum();
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}
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@Override
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public @NotNull DatabaseStageEntry<U> at(@Nullable CompositeSnapshot snapshot, T key) {
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return this.atPrivate(snapshot, key, keySuffixHashFunction.apply(key));
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}
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private DatabaseSingleBucket<T, U, TH> atPrivate(@Nullable CompositeSnapshot snapshot, T key, TH hash) {
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return new DatabaseSingleBucket<T, U, TH>(subDictionary.at(snapshot, hash), key);
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}
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@Override
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public UpdateMode getUpdateMode() {
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return subDictionary.getUpdateMode();
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}
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@Override
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public Stream<SubStageEntry<T, DatabaseStageEntry<U>>> getAllStages(@Nullable CompositeSnapshot snapshot,
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boolean smallRange) {
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return subDictionary
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.getAllEntries(snapshot, smallRange)
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.map(Entry::getValue)
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.map(Collections::unmodifiableSet)
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.flatMap(bucket -> bucket.stream()
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.map(Entry::getKey)
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.map(key -> new SubStageEntry<>(key, this.at(snapshot, key))));
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}
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@Override
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public Stream<Entry<T, U>> getAllEntries(@Nullable CompositeSnapshot snapshot, boolean smallRange) {
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return subDictionary
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.getAllEntries(snapshot, smallRange)
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.map(Entry::getValue)
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.map(Collections::unmodifiableSet)
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.flatMap(Collection::stream);
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}
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@Override
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public Stream<T> getAllKeys(@Nullable CompositeSnapshot snapshot, boolean smallRange) {
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return getAllEntries(snapshot, smallRange).map(Entry::getKey);
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}
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@Override
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public Stream<U> getAllValues(@Nullable CompositeSnapshot snapshot, boolean smallRange) {
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return getAllEntries(snapshot, smallRange).map(Entry::getValue);
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}
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@Override
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public Stream<Entry<T, U>> setAllEntriesAndGetPrevious(Stream<Entry<T, U>> entries) {
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List<Entry<T, U>> prevList = entries.map(entry -> {
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var prev = this.at(null, entry.getKey()).setAndGetPrevious(entry.getValue());
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if (prev != null) {
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return Map.entry(entry.getKey(), prev);
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} else {
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return null;
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}
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}).filter(Objects::nonNull).toList();
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return prevList.stream();
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}
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@Override
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public void clear() {
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subDictionary.clear();
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}
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@Override
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public Object2ObjectSortedMap<T, U> setAndGetPrevious(Object2ObjectSortedMap<T, U> value) {
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var v = subDictionary.setAndGetPrevious(this.serializeMap(value));
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var result = v != null ? deserializeMap(v) : null;
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return result != null && result.isEmpty() ? null : result;
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}
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@Override
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public Object2ObjectSortedMap<T, U> clearAndGetPrevious() {
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var v = subDictionary.clearAndGetPrevious();
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return v != null ? deserializeMap(v) : null;
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}
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@Override
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public long leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast) {
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return subDictionary.leavesCount(snapshot, fast);
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}
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@Override
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public ValueGetterBlocking<T, U> getDbValueGetter(@Nullable CompositeSnapshot snapshot) {
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ValueGetterBlocking<TH, ObjectArraySet<Entry<T, U>>> getter = subDictionary.getDbValueGetter(snapshot);
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return key -> extractValue(getter.get(keySuffixHashFunction.apply(key)), key);
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}
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@Override
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public ValueGetter<T, U> getAsyncDbValueGetter(@Nullable CompositeSnapshot snapshot) {
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ValueGetter<TH, ObjectArraySet<Entry<T, U>>> getter = subDictionary.getAsyncDbValueGetter(snapshot);
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return key -> {
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ObjectArraySet<Entry<T, U>> set = getter.get(keySuffixHashFunction.apply(key));
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if (set != null) {
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return this.extractValue(set, key);
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} else {
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return null;
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}
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};
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}
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@Nullable
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private U extractValue(ObjectArraySet<Entry<T, U>> entries, T key) {
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if (entries == null) return null;
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for (Entry<T, U> entry : entries) {
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if (Objects.equals(entry.getKey(), key)) {
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return entry.getValue();
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}
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}
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return null;
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}
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@NotNull
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private ObjectArraySet<Entry<T, U>> insertValueOrCreate(@Nullable ObjectArraySet<Entry<T, U>> entries, T key, U value) {
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if (entries != null) {
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var clonedEntries = entries.clone();
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clonedEntries.add(Map.entry(key, value));
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return clonedEntries;
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} else {
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var oas = new ObjectArraySet<Entry<T, U>>(1);
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oas.add(Map.entry(key, value));
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return oas;
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}
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}
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@Nullable
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private Set<Entry<T, U>> removeValueOrDelete(@Nullable ObjectArraySet<Entry<T, U>> entries, T key) {
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if (entries != null) {
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var clonedEntries = entries.clone();
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var it = clonedEntries.iterator();
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while (it.hasNext()) {
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var entry = it.next();
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if (Objects.equals(entry.getKey(), key)) {
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it.remove();
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break;
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}
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}
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if (clonedEntries.size() == 0) {
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return null;
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} else {
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return clonedEntries;
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}
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} else {
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return null;
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}
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}
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}
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