314 lines
10 KiB
Java
314 lines
10 KiB
Java
package it.cavallium.dbengine.database.collections;
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import io.netty5.buffer.BufferAllocator;
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import io.netty5.buffer.Drop;
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import io.netty5.buffer.Owned;
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import io.netty5.util.Send;
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import it.cavallium.dbengine.client.BadBlock;
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import it.cavallium.dbengine.client.CompositeSnapshot;
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import it.cavallium.dbengine.database.BufSupplier;
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import it.cavallium.dbengine.database.LLDictionary;
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import it.cavallium.dbengine.database.LLUtils;
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import io.netty5.buffer.internal.ResourceSupport;
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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.cavallium.dbengine.utils.SimpleResource;
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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.Collections;
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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 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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import reactor.core.publisher.Flux;
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import reactor.core.publisher.Mono;
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@SuppressWarnings("unused")
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public class DatabaseMapDictionaryHashed<T, U, TH> extends SimpleResource implements
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DatabaseStageMap<T, U, DatabaseStageEntry<U>> {
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private static final Logger logger = LogManager.getLogger(DatabaseMapDictionaryHashed.class);
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private final BufferAllocator alloc;
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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 BufSupplier 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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this.alloc = dictionary.getAllocator();
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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(BufferAllocator alloc,
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Function<T, TH> keySuffixHashFunction,
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DatabaseStage<Object2ObjectSortedMap<TH, ObjectArraySet<Entry<T, U>>>> subDictionary,
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Drop<DatabaseMapDictionaryHashed<T, U, TH>> drop) {
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this.alloc = alloc;
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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 BufSupplier 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 Mono<Object2ObjectSortedMap<T, U>> get(@Nullable CompositeSnapshot snapshot) {
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return subDictionary.get(snapshot).map(map -> deserializeMap(map));
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}
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@Override
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public Mono<Object2ObjectSortedMap<T, U>> getOrDefault(@Nullable CompositeSnapshot snapshot,
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Mono<Object2ObjectSortedMap<T, U>> defaultValue) {
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return this.get(snapshot).switchIfEmpty(defaultValue);
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}
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@Override
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public Mono<Void> set(Object2ObjectSortedMap<T, U> map) {
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return Mono.fromSupplier(() -> this.serializeMap(map)).flatMap(value -> subDictionary.set(value));
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}
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@Override
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public Mono<Boolean> setAndGetChanged(Object2ObjectSortedMap<T, U> map) {
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return Mono
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.fromSupplier(() -> this.serializeMap(map))
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.flatMap(value -> subDictionary.setAndGetChanged(value))
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.single();
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}
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@Override
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public Mono<Boolean> clearAndGetStatus() {
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return subDictionary.clearAndGetStatus();
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}
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@Override
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public Mono<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 Flux<BadBlock> badBlocks() {
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return this.subDictionary.badBlocks();
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}
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@Override
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public Mono<DatabaseStageEntry<U>> at(@Nullable CompositeSnapshot snapshot, T key) {
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return this
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.atPrivate(snapshot, key, keySuffixHashFunction.apply(key))
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.map(cast -> cast);
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}
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private Mono<DatabaseSingleBucket<T, U, TH>> atPrivate(@Nullable CompositeSnapshot snapshot, T key, TH hash) {
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return subDictionary.at(snapshot, hash)
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.map(entry -> new DatabaseSingleBucket<T, U, TH>(entry, 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 Flux<SubStageEntry<T, DatabaseStageEntry<U>>> getAllStages(@Nullable CompositeSnapshot snapshot,
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boolean smallRange) {
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return subDictionary
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.getAllValues(snapshot, smallRange)
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.map(Entry::getValue)
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.map(Collections::unmodifiableSet)
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.flatMap(bucket -> Flux
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.fromIterable(bucket)
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.map(Entry::getKey)
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.flatMap(key -> this.at(snapshot, key).map(stage -> new SubStageEntry<>(key, stage))));
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}
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@Override
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public Flux<Entry<T, U>> getAllValues(@Nullable CompositeSnapshot snapshot, boolean smallRange) {
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return subDictionary
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.getAllValues(snapshot, smallRange)
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.map(Entry::getValue)
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.map(Collections::unmodifiableSet)
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.concatMapIterable(list -> list);
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}
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@Override
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public Flux<Entry<T, U>> setAllValuesAndGetPrevious(Flux<Entry<T, U>> entries) {
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return entries.flatMap(entry -> Mono.usingWhen(this.at(null, entry.getKey()),
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stage -> stage.setAndGetPrevious(entry.getValue()).map(prev -> Map.entry(entry.getKey(), prev)),
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LLUtils::finalizeResource
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));
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}
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@Override
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public Mono<Void> clear() {
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return subDictionary.clear();
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}
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@Override
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public Mono<Object2ObjectSortedMap<T, U>> setAndGetPrevious(Object2ObjectSortedMap<T, U> value) {
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return Mono
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.fromSupplier(() -> this.serializeMap(value))
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.flatMap(value1 -> subDictionary.setAndGetPrevious(value1))
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.map(map -> deserializeMap(map));
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}
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@Override
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public Mono<Object2ObjectSortedMap<T, U>> clearAndGetPrevious() {
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return subDictionary
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.clearAndGetPrevious()
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.map(map -> deserializeMap(map));
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}
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@Override
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public Mono<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 -> getter
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.get(keySuffixHashFunction.apply(key))
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.flatMap(set -> this.extractValueTransformation(set, key));
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}
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private Mono<U> extractValueTransformation(ObjectArraySet<Entry<T, U>> entries, T key) {
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return Mono.fromCallable(() -> extractValue(entries, key));
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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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@Override
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protected void onClose() {
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try {
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if (subDictionary != null) {
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subDictionary.close();
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}
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} catch (Throwable ex) {
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logger.error("Failed to close subDictionary", ex);
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}
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}
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}
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