105 lines
2.7 KiB
Java
105 lines
2.7 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.collections.DatabaseEmpty.Nothing;
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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 SubStageGetterSet<T> implements SubStageGetter<Map<T, Nothing>, DatabaseSetDictionary<T>> {
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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 SerializerFixedBinaryLength<T, ByteBuf> keySerializer;
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public SubStageGetterSet(SerializerFixedBinaryLength<T, ByteBuf> keySerializer) {
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this.keySerializer = keySerializer;
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}
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@Override
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public Mono<DatabaseSetDictionary<T>> subStage(LLDictionary dictionary,
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@Nullable CompositeSnapshot snapshot,
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ByteBuf prefixKey,
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List<ByteBuf> debuggingKeys) {
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try {
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return Mono
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.defer(() -> {
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if (assertsEnabled) {
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return checkKeyFluxConsistency(prefixKey.retain(), debuggingKeys);
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} else {
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return Mono
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.fromCallable(() -> {
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for (ByteBuf key : debuggingKeys) {
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key.release();
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}
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return null;
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});
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}
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})
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.then(Mono
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.fromSupplier(() -> DatabaseSetDictionary
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.tail(
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dictionary,
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prefixKey.retain(),
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keySerializer
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)
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)
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)
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.doFirst(prefixKey::retain)
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.doAfterTerminate(prefixKey::release);
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} finally {
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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;
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}
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private Mono<Void> checkKeyFluxConsistency(ByteBuf prefixKey, List<ByteBuf> keys) {
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try {
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return Mono
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.<Void>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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.doFirst(prefixKey::retain)
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.doAfterTerminate(prefixKey::release);
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} finally {
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prefixKey.release();
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}
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}
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public int getKeyBinaryLength() {
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return keySerializer.getSerializedBinaryLength();
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}
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}
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