119 lines
3.6 KiB
Java
119 lines
3.6 KiB
Java
package it.cavallium.dbengine.database.collections;
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import io.netty.buffer.ByteBuf;
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import io.netty.util.ReferenceCounted;
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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.SerializerFixedBinaryLength;
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import java.util.List;
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import java.util.Map;
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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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public class SubStageGetterMapDeep<T, U, US extends DatabaseStage<U>> implements
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SubStageGetter<Map<T, U>, DatabaseMapDictionaryDeep<T, U, US>> {
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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 SubStageGetter<U, US> subStageGetter;
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private final SerializerFixedBinaryLength<T, ByteBuf> keySerializer;
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private final int keyExtLength;
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private final boolean enableAssertionsWhenUsingAssertions;
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public SubStageGetterMapDeep(SubStageGetter<U, US> subStageGetter,
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SerializerFixedBinaryLength<T, ByteBuf> keySerializer,
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int keyExtLength, boolean enableAssertionsWhenUsingAssertions) {
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this.subStageGetter = subStageGetter;
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this.keySerializer = keySerializer;
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this.keyExtLength = keyExtLength;
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assert keyExtConsistency();
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this.enableAssertionsWhenUsingAssertions = enableAssertionsWhenUsingAssertions;
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}
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private boolean keyExtConsistency() {
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if (subStageGetter instanceof SubStageGetterMapDeep) {
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return keyExtLength == ((SubStageGetterMapDeep<?, ?, ?>) subStageGetter).getKeyBinaryLength();
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} else if (subStageGetter instanceof SubStageGetterMap) {
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return keyExtLength == ((SubStageGetterMap<?, ?>) subStageGetter).getKeyBinaryLength();
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} else {
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return true;
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}
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}
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@Override
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public Mono<DatabaseMapDictionaryDeep<T, U, US>> 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(prefixKeyMono,
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prefixKey -> Mono
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.fromSupplier(() -> DatabaseMapDictionaryDeep
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.deepIntermediate(dictionary,
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prefixKey.retain(),
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keySerializer,
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subStageGetter,
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keyExtLength
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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() + getKeyBinaryLength()) {
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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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private Mono<Void> checkKeyFluxConsistency(ByteBuf prefixKey, List<ByteBuf> keys) {
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return Mono
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.fromCallable(() -> {
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try {
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for (ByteBuf key : keys) {
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assert key.readableBytes() == prefixKey.readableBytes() + getKeyBinaryLength();
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}
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} finally {
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prefixKey.release();
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for (ByteBuf key : keys) {
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key.release();
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}
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}
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return null;
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});
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}
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public int getKeyBinaryLength() {
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return keySerializer.getSerializedBinaryLength() + keyExtLength;
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}
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}
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