Add hash maps and sets
This commit is contained in:
Andrea Cavalli
parent
eb0ac6fbb9
commit
6753db7dbe
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@ -2,6 +2,7 @@ package it.cavallium.dbengine.database.collections;
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import it.cavallium.dbengine.database.LLDictionary;
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import it.cavallium.dbengine.database.serialization.Serializer;
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import java.util.function.Function;
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import org.jetbrains.annotations.NotNull;
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public class DatabaseEmpty {
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@ -9,7 +10,7 @@ public class DatabaseEmpty {
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@SuppressWarnings({"unused", "InstantiationOfUtilityClass"})
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public static final Nothing NOTHING = new Nothing();
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private static final byte[] NOTHING_BYTES = new byte[0];
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private static final Serializer<Nothing, byte[]> NOTHING_SERIALIZER = new Serializer<>() {
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public static final Serializer<Nothing, byte[]> NOTHING_SERIALIZER = new Serializer<>() {
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@Override
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public @NotNull Nothing deserialize(byte @NotNull [] serialized) {
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return NOTHING;
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@ -20,7 +21,9 @@ public class DatabaseEmpty {
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return NOTHING_BYTES;
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}
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};
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private static final SubStageGetter<Nothing, DatabaseStageEntry<Nothing>> NOTHING_SUB_STAGE_GETTER = new SubStageGetterSingle<>(NOTHING_SERIALIZER);
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public static final Function<Nothing, Nothing> NOTHING_HASH_FUNCTION = nothing -> nothing;
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private static final SubStageGetter<Nothing, DatabaseStageEntry<Nothing>> NOTHING_SUB_STAGE_GETTER
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= new SubStageGetterSingle<>(NOTHING_SERIALIZER);
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private DatabaseEmpty() {
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}
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@ -0,0 +1,382 @@
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package it.cavallium.dbengine.database.collections;
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import static it.cavallium.dbengine.database.collections.DatabaseMapDictionaryDeep.EMPTY_BYTES;
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import com.google.common.primitives.Ints;
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import it.cavallium.dbengine.client.CompositeSnapshot;
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import it.cavallium.dbengine.database.LLDictionary;
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import it.cavallium.dbengine.database.collections.Joiner.ValueGetter;
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import it.cavallium.dbengine.database.collections.JoinerBlocking.ValueGetterBlocking;
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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 java.util.Arrays;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.Optional;
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import java.util.function.Function;
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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> implements DatabaseStageMap<T, U, DatabaseStageEntry<U>> {
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private final DatabaseMapDictionary<TH, Entry<T, U>> subDictionary;
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private final Function<T, TH> keySuffixHashFunction;
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private final Function<T, ValueMapper<T, U>> valueMapper;
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protected DatabaseMapDictionaryHashed(LLDictionary dictionary,
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byte[] prefixKey,
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Serializer<T, byte[]> keySuffixSerializer,
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Serializer<U, byte[]> valueSerializer,
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Function<T, TH> keySuffixHashFunction,
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SerializerFixedBinaryLength<TH, byte[]> keySuffixHashSerializer) {
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ValueWithHashSerializer<T, U> valueWithHashSerializer = new ValueWithHashSerializer<>(keySuffixSerializer,
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valueSerializer
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);
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this.valueMapper = ValueMapper::new;
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this.subDictionary = DatabaseMapDictionary.tail(dictionary,
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prefixKey,
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keySuffixHashSerializer, valueWithHashSerializer
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);
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this.keySuffixHashFunction = keySuffixHashFunction;
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}
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private static class ValueWithHashSerializer<T, U> implements Serializer<Entry<T, U>, byte[]> {
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private final Serializer<T, byte[]> keySuffixSerializer;
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private final Serializer<U, byte[]> valueSerializer;
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private ValueWithHashSerializer(Serializer<T, byte[]> keySuffixSerializer, Serializer<U, byte[]> valueSerializer) {
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this.keySuffixSerializer = keySuffixSerializer;
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this.valueSerializer = valueSerializer;
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}
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@Override
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public @NotNull Entry<T, U> deserialize(byte @NotNull [] serialized) {
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int keySuffixLength = Ints.fromBytes(serialized[0], serialized[1], serialized[2], serialized[3]);
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T keySuffix = keySuffixSerializer.deserialize(Arrays.copyOfRange(serialized, 4, keySuffixLength));
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U value = valueSerializer.deserialize(Arrays.copyOfRange(serialized,
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4 + keySuffixLength,
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serialized.length - (4 + keySuffixLength)
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));
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return Map.entry(keySuffix, value);
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}
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@Override
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public byte @NotNull [] serialize(@NotNull Entry<T, U> deserialized) {
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byte[] keySuffix = keySuffixSerializer.serialize(deserialized.getKey());
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byte[] value = valueSerializer.serialize(deserialized.getValue());
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byte[] result = new byte[4 + keySuffix.length + value.length];
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byte[] keySuffixLen = Ints.toByteArray(keySuffix.length);
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System.arraycopy(keySuffixLen, 0, result, 0, 4);
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System.arraycopy(keySuffix, 0, result, 4, keySuffix.length);
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System.arraycopy(value, 0, result, 4 + keySuffix.length, value.length);
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return result;
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}
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}
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private static class ValueMapper<T, U> implements Serializer<U, Entry<T, U>> {
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private final T key;
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public ValueMapper(T key) {
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this.key = key;
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}
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@Override
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public @NotNull U deserialize(@NotNull Entry<T, U> serialized) {
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return serialized.getValue();
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}
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@Override
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public @NotNull Entry<T, U> serialize(@NotNull U deserialized) {
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return Map.entry(key, deserialized);
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}
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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, byte[]> keySerializer,
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Serializer<U, byte[]> valueSerializer,
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Function<T, UH> keyHashFunction,
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SerializerFixedBinaryLength<UH, byte[]> keyHashSerializer) {
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return new DatabaseMapDictionaryHashed<>(dictionary,
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EMPTY_BYTES,
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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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byte[] prefixKey,
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Serializer<T, byte[]> keySuffixSerializer,
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Serializer<U, byte[]> valueSerializer,
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Function<T, UH> keySuffixHashFunction,
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SerializerFixedBinaryLength<UH, byte[]> keySuffixHashSerializer) {
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return new DatabaseMapDictionaryHashed<>(dictionary,
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prefixKey,
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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 Map<TH, Entry<T, U>> serializeMap(Map<T, U> map) {
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var newMap = new HashMap<TH, Entry<T, U>>(map.size());
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map.forEach((key, value) -> newMap.put(keySuffixHashFunction.apply(key), Map.entry(key, value)));
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return newMap;
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}
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private Map<T, U> deserializeMap(Map<TH, Entry<T, U>> map) {
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var newMap = new HashMap<T, U>(map.size());
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map.forEach((key, value) -> newMap.put(value.getKey(), value.getValue()));
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return newMap;
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}
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@Override
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public Mono<Map<T, U>> get(@Nullable CompositeSnapshot snapshot) {
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return subDictionary.get(snapshot).map(this::deserializeMap);
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}
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@Override
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public Mono<Map<T, U>> getOrDefault(@Nullable CompositeSnapshot snapshot, Mono<Map<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(Map<T, U> map) {
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return Mono.fromSupplier(() -> this.serializeMap(map)).flatMap(subDictionary::set);
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}
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@Override
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public Mono<Boolean> setAndGetStatus(Map<T, U> map) {
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return Mono.fromSupplier(() -> this.serializeMap(map)).flatMap(subDictionary::setAndGetStatus);
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}
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@Override
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public Mono<Boolean> update(Function<Optional<Map<T, U>>, Optional<Map<T, U>>> updater) {
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return subDictionary.update(old -> updater.apply(old.map(this::deserializeMap)).map(this::serializeMap));
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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<Void> close() {
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return subDictionary.close();
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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<Map<T, U>> entry() {
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return this;
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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 subDictionary
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.at(snapshot, keySuffixHashFunction.apply(key))
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.map(entry -> new DatabaseSingleMapped<>(entry, valueMapper.apply(key)));
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}
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@Override
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public Mono<U> getValue(@Nullable CompositeSnapshot snapshot, T key, boolean existsAlmostCertainly) {
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return subDictionary
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.getValue(snapshot, keySuffixHashFunction.apply(key), existsAlmostCertainly)
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.map(Entry::getValue);
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}
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@Override
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public Mono<U> getValue(@Nullable CompositeSnapshot snapshot, T key) {
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return subDictionary.getValue(snapshot, keySuffixHashFunction.apply(key)).map(Entry::getValue);
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}
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@Override
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public Mono<U> getValueOrDefault(@Nullable CompositeSnapshot snapshot, T key, Mono<U> defaultValue) {
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return subDictionary
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.getValueOrDefault(snapshot, keySuffixHashFunction.apply(key), defaultValue.map(v -> Map.entry(key, v)))
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.map(Entry::getValue);
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}
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@Override
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public Mono<Void> putValue(T key, U value) {
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return subDictionary.putValue(keySuffixHashFunction.apply(key), Map.entry(key, value));
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}
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@Override
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public Mono<Boolean> updateValue(T key, boolean existsAlmostCertainly, Function<Optional<U>, Optional<U>> updater) {
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return subDictionary.updateValue(keySuffixHashFunction.apply(key),
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existsAlmostCertainly,
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old -> updater.apply(old.map(Entry::getValue)).map(newV -> Map.entry(key, newV))
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);
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}
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@Override
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public Mono<Boolean> updateValue(T key, Function<Optional<U>, Optional<U>> updater) {
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return subDictionary.updateValue(keySuffixHashFunction.apply(key),
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old -> updater.apply(old.map(Entry::getValue)).map(newV -> Map.entry(key, newV))
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);
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}
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@Override
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public Mono<U> putValueAndGetPrevious(T key, U value) {
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return subDictionary
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.putValueAndGetPrevious(keySuffixHashFunction.apply(key), Map.entry(key, value))
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.map(Entry::getValue);
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}
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@Override
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public Mono<Boolean> putValueAndGetStatus(T key, U value) {
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return subDictionary
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.putValueAndGetStatus(keySuffixHashFunction.apply(key), Map.entry(key, value));
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}
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@Override
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public Mono<Void> remove(T key) {
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return subDictionary.remove(keySuffixHashFunction.apply(key));
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}
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@Override
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public Mono<U> removeAndGetPrevious(T key) {
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return subDictionary.removeAndGetPrevious(keySuffixHashFunction.apply(key)).map(Entry::getValue);
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}
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@Override
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public Mono<Boolean> removeAndGetStatus(T key) {
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return subDictionary.removeAndGetStatus(keySuffixHashFunction.apply(key));
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}
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@Override
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public Flux<Entry<T, U>> getMulti(@Nullable CompositeSnapshot snapshot, Flux<T> keys, boolean existsAlmostCertainly) {
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return subDictionary
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.getMulti(snapshot, keys.map(keySuffixHashFunction), existsAlmostCertainly)
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.map(Entry::getValue);
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}
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@Override
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public Flux<Entry<T, U>> getMulti(@Nullable CompositeSnapshot snapshot, Flux<T> keys) {
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return subDictionary
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.getMulti(snapshot, keys.map(keySuffixHashFunction))
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.map(Entry::getValue);
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}
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@Override
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public Mono<Void> putMulti(Flux<Entry<T, U>> entries) {
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return subDictionary
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.putMulti(entries.map(entry -> Map.entry(keySuffixHashFunction.apply(entry.getKey()),
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Map.entry(entry.getKey(), entry.getValue())
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)));
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}
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@Override
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public Flux<Entry<T, DatabaseStageEntry<U>>> getAllStages(@Nullable CompositeSnapshot snapshot) {
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return subDictionary
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.getAllStages(snapshot)
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.flatMap(hashEntry -> hashEntry
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.getValue()
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.get(snapshot)
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.map(entry -> Map.entry(entry.getKey(),
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new DatabaseSingleMapped<>(hashEntry.getValue(), valueMapper.apply(entry.getKey()))
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))
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);
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}
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@Override
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public Flux<Entry<T, U>> getAllValues(@Nullable CompositeSnapshot snapshot) {
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return subDictionary.getAllValues(snapshot).map(Entry::getValue);
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}
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@Override
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public Mono<Void> setAllValues(Flux<Entry<T, U>> entries) {
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return subDictionary
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.setAllValues(entries.map(entry -> Map.entry(keySuffixHashFunction.apply(entry.getKey()), entry)));
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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 subDictionary
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.setAllValuesAndGetPrevious(entries.map(entry -> Map.entry(keySuffixHashFunction.apply(entry.getKey()), entry)))
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.map(Entry::getValue);
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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<Void> replaceAllValues(boolean canKeysChange, Function<Entry<T, U>, Mono<Entry<T, U>>> entriesReplacer) {
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return subDictionary.replaceAllValues(canKeysChange,
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entry -> entriesReplacer
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.apply(entry.getValue())
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.map(result -> Map.entry(keySuffixHashFunction.apply(result.getKey()), result))
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);
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}
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@Override
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public Mono<Void> replaceAll(Function<Entry<T, DatabaseStageEntry<U>>, Mono<Void>> entriesReplacer) {
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return subDictionary.replaceAll(hashEntry -> hashEntry
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.getValue()
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.get(null)
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.flatMap(entry -> entriesReplacer.apply(Map.entry(entry.getKey(),
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new DatabaseSingleMapped<>(hashEntry.getValue(), valueMapper.apply(entry.getKey()))
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))));
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}
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@Override
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public Mono<Map<T, U>> setAndGetPrevious(Map<T, U> value) {
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return Mono
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.fromSupplier(() -> this.serializeMap(value))
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.flatMap(subDictionary::setAndGetPrevious)
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.map(this::deserializeMap);
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}
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@Override
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public Mono<Boolean> update(Function<Optional<Map<T, U>>, Optional<Map<T, U>>> updater,
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boolean existsAlmostCertainly) {
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return subDictionary
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.update(item -> updater.apply(item.map(this::deserializeMap)).map(this::serializeMap), existsAlmostCertainly);
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}
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@Override
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public Mono<Map<T, U>> clearAndGetPrevious() {
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return subDictionary
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.clearAndGetPrevious()
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.map(this::deserializeMap);
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}
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@Override
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public Mono<Map<T, U>> get(@Nullable CompositeSnapshot snapshot, boolean existsAlmostCertainly) {
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return subDictionary
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.get(snapshot, existsAlmostCertainly)
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.map(this::deserializeMap);
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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, Entry<T, U>> getter = subDictionary.getDbValueGetter(snapshot);
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return key -> getter.get(keySuffixHashFunction.apply(key)).getValue();
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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, Entry<T, U>> getter = subDictionary.getAsyncDbValueGetter(snapshot);
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return key -> getter.get(keySuffixHashFunction.apply(key)).map(Entry::getValue);
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}
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}
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@ -0,0 +1,74 @@
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package it.cavallium.dbengine.database.collections;
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import static it.cavallium.dbengine.database.collections.DatabaseMapDictionaryDeep.EMPTY_BYTES;
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import it.cavallium.dbengine.client.CompositeSnapshot;
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import it.cavallium.dbengine.database.LLDictionary;
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import it.cavallium.dbengine.database.collections.DatabaseEmpty.Nothing;
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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 java.util.HashMap;
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import java.util.Map;
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import java.util.Set;
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import java.util.function.Function;
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import org.jetbrains.annotations.Nullable;
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import reactor.core.publisher.Mono;
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@SuppressWarnings("unused")
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public class DatabaseSetDictionaryHashed<T, TH> extends DatabaseMapDictionaryHashed<T, Nothing, TH> {
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protected DatabaseSetDictionaryHashed(LLDictionary dictionary,
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byte[] prefixKey,
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Serializer<T, byte[]> keySuffixSerializer,
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Function<T, TH> keySuffixHashFunction,
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SerializerFixedBinaryLength<TH, byte[]> keySuffixHashSerializer) {
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super(dictionary,
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prefixKey,
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keySuffixSerializer,
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DatabaseEmpty.NOTHING_SERIALIZER,
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keySuffixHashFunction,
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keySuffixHashSerializer
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);
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}
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public static <T, TH> DatabaseSetDictionaryHashed<T, TH> simple(LLDictionary dictionary,
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SerializerFixedBinaryLength<T, byte[]> keySerializer,
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Function<T, TH> keyHashFunction,
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SerializerFixedBinaryLength<TH, byte[]> keyHashSerializer) {
|
||||
return new DatabaseSetDictionaryHashed<>(dictionary,
|
||||
EMPTY_BYTES,
|
||||
keySerializer,
|
||||
keyHashFunction,
|
||||
keyHashSerializer
|
||||
);
|
||||
}
|
||||
|
||||
public static <T, TH> DatabaseSetDictionaryHashed<T, TH> tail(LLDictionary dictionary,
|
||||
byte[] prefixKey,
|
||||
SerializerFixedBinaryLength<T, byte[]> keySuffixSerializer,
|
||||
Function<T, TH> keyHashFunction,
|
||||
SerializerFixedBinaryLength<TH, byte[]> keyHashSerializer) {
|
||||
return new DatabaseSetDictionaryHashed<>(dictionary,
|
||||
prefixKey,
|
||||
keySuffixSerializer,
|
||||
keyHashFunction,
|
||||
keyHashSerializer
|
||||
);
|
||||
}
|
||||
|
||||
public Mono<Set<T>> getKeySet(@Nullable CompositeSnapshot snapshot) {
|
||||
return get(snapshot).map(Map::keySet);
|
||||
}
|
||||
|
||||
public Mono<Set<T>> setAndGetPreviousKeySet(Set<T> value) {
|
||||
var hm = new HashMap<T, Nothing>();
|
||||
for (T t : value) {
|
||||
hm.put(t, DatabaseEmpty.NOTHING);
|
||||
}
|
||||
return setAndGetPrevious(hm).map(Map::keySet);
|
||||
}
|
||||
|
||||
public Mono<Set<T>> clearAndGetPreviousKeySet() {
|
||||
return clearAndGetPrevious().map(Map::keySet);
|
||||
}
|
||||
}
|
||||
|
|
@ -7,43 +7,44 @@ import java.util.function.Function;
|
|||
import org.jetbrains.annotations.Nullable;
|
||||
import reactor.core.publisher.Mono;
|
||||
|
||||
public class DatabaseSingleMapped<U> implements DatabaseStageEntry<U> {
|
||||
@SuppressWarnings("unused")
|
||||
public class DatabaseSingleMapped<A, B> implements DatabaseStageEntry<A> {
|
||||
|
||||
private final DatabaseSingle<byte[]> serializedSingle;
|
||||
private final Serializer<U, byte[]> serializer;
|
||||
private final DatabaseStageEntry<B> serializedSingle;
|
||||
private final Serializer<A, B> serializer;
|
||||
|
||||
public DatabaseSingleMapped(DatabaseSingle<byte[]> serializedSingle, Serializer<U, byte[]> serializer) {
|
||||
public DatabaseSingleMapped(DatabaseStageEntry<B> serializedSingle, Serializer<A, B> serializer) {
|
||||
this.serializedSingle = serializedSingle;
|
||||
this.serializer = serializer;
|
||||
}
|
||||
|
||||
@Override
|
||||
public Mono<U> get(@Nullable CompositeSnapshot snapshot, boolean existsAlmostCertainly) {
|
||||
public Mono<A> get(@Nullable CompositeSnapshot snapshot, boolean existsAlmostCertainly) {
|
||||
return serializedSingle.get(snapshot, existsAlmostCertainly).map(this::deserialize);
|
||||
}
|
||||
|
||||
@Override
|
||||
public Mono<U> getOrDefault(@Nullable CompositeSnapshot snapshot, Mono<U> defaultValue) {
|
||||
public Mono<A> getOrDefault(@Nullable CompositeSnapshot snapshot, Mono<A> defaultValue) {
|
||||
return serializedSingle.get(snapshot).map(this::deserialize).switchIfEmpty(defaultValue);
|
||||
}
|
||||
|
||||
@Override
|
||||
public Mono<Void> set(U value) {
|
||||
public Mono<Void> set(A value) {
|
||||
return serializedSingle.set(serialize(value));
|
||||
}
|
||||
|
||||
@Override
|
||||
public Mono<U> setAndGetPrevious(U value) {
|
||||
public Mono<A> setAndGetPrevious(A value) {
|
||||
return serializedSingle.setAndGetPrevious(serialize(value)).map(this::deserialize);
|
||||
}
|
||||
|
||||
@Override
|
||||
public Mono<Boolean> setAndGetStatus(U value) {
|
||||
public Mono<Boolean> setAndGetStatus(A value) {
|
||||
return serializedSingle.setAndGetStatus(serialize(value));
|
||||
}
|
||||
|
||||
@Override
|
||||
public Mono<Boolean> update(Function<Optional<U>, Optional<U>> updater, boolean existsAlmostCertainly) {
|
||||
public Mono<Boolean> update(Function<Optional<A>, Optional<A>> updater, boolean existsAlmostCertainly) {
|
||||
return serializedSingle
|
||||
.update(oldValue -> updater.apply(oldValue.map(this::deserialize)).map(this::serialize), existsAlmostCertainly);
|
||||
}
|
||||
|
|
@ -54,7 +55,7 @@ public class DatabaseSingleMapped<U> implements DatabaseStageEntry<U> {
|
|||
}
|
||||
|
||||
@Override
|
||||
public Mono<U> clearAndGetPrevious() {
|
||||
public Mono<A> clearAndGetPrevious() {
|
||||
return serializedSingle.clearAndGetPrevious().map(this::deserialize);
|
||||
}
|
||||
|
||||
|
|
@ -79,17 +80,17 @@ public class DatabaseSingleMapped<U> implements DatabaseStageEntry<U> {
|
|||
}
|
||||
|
||||
@Override
|
||||
public DatabaseStageEntry<U> entry() {
|
||||
public DatabaseStageEntry<A> entry() {
|
||||
return this;
|
||||
}
|
||||
|
||||
//todo: temporary wrapper. convert the whole class to buffers
|
||||
private U deserialize(byte[] bytes) {
|
||||
private A deserialize(B bytes) {
|
||||
return serializer.deserialize(bytes);
|
||||
}
|
||||
|
||||
//todo: temporary wrapper. convert the whole class to buffers
|
||||
private byte[] serialize(U bytes) {
|
||||
private B serialize(A bytes) {
|
||||
return serializer.serialize(bytes);
|
||||
}
|
||||
}
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user