98 lines
3.0 KiB
Java
98 lines
3.0 KiB
Java
package it.cavallium.dbengine.database.collections;
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import io.netty.buffer.ByteBuf;
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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.serialization.Serializer;
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import it.cavallium.dbengine.database.serialization.SerializerFixedBinaryLength;
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import java.util.List;
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import java.util.Map;
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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.Flux;
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import reactor.core.publisher.Mono;
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@SuppressWarnings("unused")
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public class SubStageGetterHashMap<T, U, TH> implements
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SubStageGetter<Map<T, U>, DatabaseMapDictionaryHashed<T, U, TH>> {
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private static final boolean assertsEnabled;
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static {
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boolean assertsEnabledTmp = false;
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//noinspection AssertWithSideEffects
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assert assertsEnabledTmp = true;
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//noinspection ConstantConditions
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assertsEnabled = assertsEnabledTmp;
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}
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private final Serializer<T, ByteBuf> keySerializer;
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private final Serializer<U, ByteBuf> valueSerializer;
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private final Function<T, TH> keyHashFunction;
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private final SerializerFixedBinaryLength<TH, ByteBuf> keyHashSerializer;
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private final boolean enableAssertionsWhenUsingAssertions;
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public SubStageGetterHashMap(Serializer<T, ByteBuf> keySerializer,
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Serializer<U, ByteBuf> valueSerializer,
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Function<T, TH> keyHashFunction,
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SerializerFixedBinaryLength<TH, ByteBuf> keyHashSerializer,
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boolean enableAssertionsWhenUsingAssertions) {
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this.keySerializer = keySerializer;
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this.valueSerializer = valueSerializer;
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this.keyHashFunction = keyHashFunction;
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this.keyHashSerializer = keyHashSerializer;
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this.enableAssertionsWhenUsingAssertions = enableAssertionsWhenUsingAssertions;
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}
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@Override
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public Mono<DatabaseMapDictionaryHashed<T, U, TH>> subStage(LLDictionary dictionary,
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@Nullable CompositeSnapshot snapshot,
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Mono<ByteBuf> prefixKeyMono,
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Flux<ByteBuf> debuggingKeysFlux) {
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return Mono.usingWhen(
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prefixKeyMono,
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prefixKey -> Mono
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.fromSupplier(() -> DatabaseMapDictionaryHashed
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.tail(dictionary,
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prefixKey.retain(),
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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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.transform(mono -> {
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if (assertsEnabled && enableAssertionsWhenUsingAssertions) {
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return debuggingKeysFlux.handle((key, sink) -> {
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try {
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if (key.readableBytes() != prefixKey.readableBytes() + getKeyHashBinaryLength()) {
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sink.error(new IndexOutOfBoundsException());
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} else {
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sink.complete();
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}
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} finally {
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key.release();
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}
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}).then(mono);
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} else {
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return mono;
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}
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}),
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prefixKey -> Mono.fromRunnable(prefixKey::release)
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);
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}
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@Override
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public boolean isMultiKey() {
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return true;
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}
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@Override
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public boolean needsDebuggingKeyFlux() {
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return assertsEnabled && enableAssertionsWhenUsingAssertions;
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}
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public int getKeyHashBinaryLength() {
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return keyHashSerializer.getSerializedBinaryLength();
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}
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}
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