2021-05-08 03:09:00 +02:00
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package it.cavallium.dbengine.database.collections;
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2021-09-23 20:57:28 +02:00
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import io.net5.buffer.api.Drop;
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import io.net5.buffer.api.Owned;
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import io.net5.buffer.api.Send;
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2021-06-26 02:35:33 +02:00
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import it.cavallium.dbengine.client.BadBlock;
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2021-05-08 03:09:00 +02:00
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import it.cavallium.dbengine.client.CompositeSnapshot;
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import it.cavallium.dbengine.database.Delta;
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import it.cavallium.dbengine.database.LLUtils;
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2021-10-17 17:15:57 +02:00
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import io.net5.buffer.api.internal.ResourceSupport;
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2021-05-08 03:09:00 +02:00
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import it.cavallium.dbengine.database.UpdateReturnMode;
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2021-08-22 21:23:22 +02:00
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import it.cavallium.dbengine.database.serialization.SerializationFunction;
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2021-05-08 03:09:00 +02:00
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import it.unimi.dsi.fastutil.objects.ObjectArraySet;
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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 org.jetbrains.annotations.NotNull;
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import org.jetbrains.annotations.Nullable;
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2021-10-01 19:17:33 +02:00
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import org.warp.commonutils.log.Logger;
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import org.warp.commonutils.log.LoggerFactory;
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2021-06-26 02:35:33 +02:00
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import reactor.core.publisher.Flux;
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2021-05-08 03:09:00 +02:00
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import reactor.core.publisher.Mono;
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@SuppressWarnings("unused")
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2021-09-23 20:57:28 +02:00
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public class DatabaseSingleBucket<K, V, TH>
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2021-10-17 17:15:57 +02:00
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extends ResourceSupport<DatabaseStage<V>, DatabaseSingleBucket<K, V, TH>>
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implements DatabaseStageEntry<V> {
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2021-05-08 03:09:00 +02:00
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2021-10-01 19:17:33 +02:00
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private static final Logger logger = LoggerFactory.getLogger(DatabaseSingleBucket.class);
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private static final Drop<DatabaseSingleBucket<?, ?, ?>> DROP = new Drop<>() {
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@Override
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public void drop(DatabaseSingleBucket<?, ?, ?> obj) {
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try {
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if (obj.bucketStage != null) {
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obj.bucketStage.close();
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}
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} catch (Throwable ex) {
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logger.error("Failed to close bucketStage", ex);
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}
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try {
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if (obj.onClose != null) {
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obj.onClose.run();
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}
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} catch (Throwable ex) {
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logger.error("Failed to close onClose", ex);
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}
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}
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@Override
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public Drop<DatabaseSingleBucket<?, ?, ?>> fork() {
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return this;
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}
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@Override
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public void attach(DatabaseSingleBucket<?, ?, ?> obj) {
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}
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};
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private final K key;
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private DatabaseStageEntry<ObjectArraySet<Entry<K, V>>> bucketStage;
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2021-10-01 19:17:33 +02:00
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private Runnable onClose;
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@SuppressWarnings({"unchecked", "rawtypes"})
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public DatabaseSingleBucket(DatabaseStageEntry<ObjectArraySet<Entry<K, V>>> bucketStage, K key, Runnable onClose) {
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super((Drop<DatabaseSingleBucket<K,V,TH>>) (Drop) DROP);
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this.key = key;
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this.bucketStage = bucketStage;
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this.onClose = onClose;
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}
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@SuppressWarnings({"unchecked", "rawtypes"})
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private DatabaseSingleBucket(Send<DatabaseStage<ObjectArraySet<Entry<K, V>>>> bucketStage, K key, Runnable onClose) {
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super((Drop<DatabaseSingleBucket<K,V,TH>>) (Drop) DROP);
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this.key = key;
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this.bucketStage = (DatabaseStageEntry<ObjectArraySet<Entry<K, V>>>) bucketStage.receive();
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this.onClose = onClose;
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}
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@Override
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public Mono<V> get(@Nullable CompositeSnapshot snapshot, boolean existsAlmostCertainly) {
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return bucketStage.get(snapshot, existsAlmostCertainly).flatMap(this::extractValueTransformation);
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}
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@Override
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public Mono<V> getOrDefault(@Nullable CompositeSnapshot snapshot, Mono<V> defaultValue) {
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return bucketStage.get(snapshot).flatMap(this::extractValueTransformation).switchIfEmpty(defaultValue);
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}
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@Override
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public Mono<Void> set(V value) {
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return this.update(prev -> value, UpdateReturnMode.NOTHING).then();
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}
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@Override
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public Mono<V> setAndGetPrevious(V value) {
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return this.update(prev -> value, UpdateReturnMode.GET_OLD_VALUE);
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}
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@Override
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public Mono<Boolean> setAndGetChanged(V value) {
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return this.updateAndGetDelta(prev -> value).map(LLUtils::isDeltaChanged);
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}
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@Override
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public Mono<V> update(SerializationFunction<@Nullable V, @Nullable V> updater,
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UpdateReturnMode updateReturnMode,
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boolean existsAlmostCertainly) {
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return bucketStage
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.update(oldBucket -> {
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V oldValue = extractValue(oldBucket);
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2021-06-19 12:14:14 +02:00
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V newValue = updater.apply(oldValue);
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if (newValue == null) {
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return this.removeValueOrDelete(oldBucket);
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} else {
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return this.insertValueOrCreate(oldBucket, newValue);
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}
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}, updateReturnMode, existsAlmostCertainly)
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.flatMap(this::extractValueTransformation);
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}
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@Override
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public Mono<Delta<V>> updateAndGetDelta(SerializationFunction<@Nullable V, @Nullable V> updater,
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boolean existsAlmostCertainly) {
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return bucketStage
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.updateAndGetDelta(oldBucket -> {
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V oldValue = extractValue(oldBucket);
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var result = updater.apply(oldValue);
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if (result == null) {
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return this.removeValueOrDelete(oldBucket);
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} else {
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return this.insertValueOrCreate(oldBucket, result);
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}
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}, existsAlmostCertainly)
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.transform(mono -> LLUtils.mapDelta(mono, this::extractValue));
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}
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@Override
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public Mono<Void> clear() {
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return this.update(prev -> null, UpdateReturnMode.NOTHING).then();
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}
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@Override
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public Mono<V> clearAndGetPrevious() {
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return this.update(prev -> null, UpdateReturnMode.GET_OLD_VALUE);
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}
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@Override
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public Mono<Boolean> clearAndGetStatus() {
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return this.updateAndGetDelta(prev -> null).map(LLUtils::isDeltaChanged);
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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 this.get(snapshot).map(prev -> 1L).defaultIfEmpty(0L);
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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 this.get(snapshot).map(prev -> true).defaultIfEmpty(true);
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}
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@Override
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public DatabaseStageEntry<V> entry() {
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return this;
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}
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2021-06-26 02:35:33 +02:00
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@Override
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public Flux<BadBlock> badBlocks() {
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return bucketStage.badBlocks();
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}
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private Mono<V> extractValueTransformation(Set<Entry<K, V>> entries) {
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return Mono.fromCallable(() -> extractValue(entries));
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}
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@Nullable
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private V extractValue(Set<Entry<K, V>> entries) {
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if (entries == null) return null;
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for (Entry<K, V> 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<K, V>> insertValueOrCreate(@Nullable ObjectArraySet<Entry<K, V>> entries, V value) {
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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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2021-07-13 22:58:08 +02:00
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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<K, V>>(1);
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2021-05-17 04:10:41 +02:00
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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 ObjectArraySet<Entry<K, V>> removeValueOrDelete(@Nullable ObjectArraySet<Entry<K, V>> entries) {
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if (entries != null) {
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2021-07-13 22:58:08 +02:00
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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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2021-07-13 22:58:08 +02:00
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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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2021-09-23 20:57:28 +02:00
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@Override
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protected RuntimeException createResourceClosedException() {
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throw new IllegalStateException("Closed");
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}
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@Override
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protected Owned<DatabaseSingleBucket<K, V, TH>> prepareSend() {
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var bucketStage = this.bucketStage.send();
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2021-10-01 19:17:33 +02:00
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var onClose = this.onClose;
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return drop -> {
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var instance = new DatabaseSingleBucket<K, V, TH>(bucketStage, key, onClose);
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drop.attach(instance);
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return instance;
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};
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2021-09-23 20:57:28 +02:00
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}
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@Override
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protected void makeInaccessible() {
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this.bucketStage = null;
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2021-10-01 19:17:33 +02:00
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this.onClose = null;
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}
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2021-05-08 03:09:00 +02:00
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}
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