79 lines
2.6 KiB
Java
79 lines
2.6 KiB
Java
package it.cavallium.dbengine.database.memory;
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import io.net5.buffer.api.Buffer;
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import io.net5.buffer.api.BufferAllocator;
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import io.net5.buffer.api.Send;
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import it.cavallium.dbengine.database.LLDelta;
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import it.cavallium.dbengine.database.LLDictionaryResultType;
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import it.cavallium.dbengine.database.LLSingleton;
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import it.cavallium.dbengine.database.LLSnapshot;
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import it.cavallium.dbengine.database.LLUtils;
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import it.cavallium.dbengine.database.UpdateMode;
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import it.cavallium.dbengine.database.UpdateReturnMode;
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import it.cavallium.dbengine.database.disk.UpdateAtomicResult;
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import it.cavallium.dbengine.database.disk.UpdateAtomicResultCurrent;
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import it.cavallium.dbengine.database.disk.UpdateAtomicResultMode;
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import it.cavallium.dbengine.database.disk.UpdateAtomicResultPrevious;
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import it.cavallium.dbengine.database.serialization.SerializationException;
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import it.cavallium.dbengine.database.serialization.SerializationFunction;
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import java.io.IOException;
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import java.util.concurrent.Callable;
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import java.util.concurrent.atomic.AtomicReference;
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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.Mono;
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import reactor.core.scheduler.Schedulers;
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public class LLMemorySingleton implements LLSingleton {
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private final LLMemoryDictionary dict;
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private final byte[] singletonName;
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private final Mono<Send<Buffer>> singletonNameBufMono;
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public LLMemorySingleton(LLMemoryDictionary dict, byte[] singletonName) {
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this.dict = dict;
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this.singletonName = singletonName;
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this.singletonNameBufMono = Mono.fromCallable(() -> dict
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.getAllocator()
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.allocate(singletonName.length)
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.writeBytes(singletonName)
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.send());
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}
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@Override
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public String getDatabaseName() {
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return dict.getDatabaseName();
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}
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@Override
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public BufferAllocator getAllocator() {
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return dict.getAllocator();
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}
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@Override
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public Mono<byte[]> get(@Nullable LLSnapshot snapshot) {
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return dict
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.get(snapshot, singletonNameBufMono, false)
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.map(b -> {
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try (var buf = b.receive()) {
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return LLUtils.toArray(buf);
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}
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});
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}
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@Override
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public Mono<Void> set(byte[] value) {
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var bbKey = singletonNameBufMono;
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var bbVal = Mono.fromCallable(() -> dict.getAllocator().allocate(value.length).writeBytes(value).send());
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return dict
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.put(bbKey, bbVal, LLDictionaryResultType.VOID)
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.then();
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}
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@Override
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public Mono<Send<Buffer>> update(SerializationFunction<@Nullable Send<Buffer>, @Nullable Buffer> updater,
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UpdateReturnMode updateReturnMode) {
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return dict.update(singletonNameBufMono, updater, updateReturnMode, true);
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}
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}
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