49 lines
1.5 KiB
Java
49 lines
1.5 KiB
Java
package it.cavallium.dbengine.database.collections;
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import com.google.common.primitives.Ints;
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import it.cavallium.dbengine.database.LLKeyValueDatabaseStructure;
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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.serialization.SerializationException;
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import it.cavallium.dbengine.database.serialization.SerializerFixedBinaryLength;
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import org.jetbrains.annotations.Nullable;
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import reactor.core.publisher.Mono;
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public class DatabaseInt implements LLKeyValueDatabaseStructure {
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private final LLSingleton singleton;
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private final SerializerFixedBinaryLength<Integer> serializer;
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public DatabaseInt(LLSingleton singleton) {
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this.singleton = singleton;
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this.serializer = SerializerFixedBinaryLength.intSerializer(singleton.getAllocator());
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}
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public Mono<Integer> get(@Nullable LLSnapshot snapshot) {
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var resultMono = singleton.get(snapshot);
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return Mono.usingWhen(resultMono,
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result -> Mono.fromSupplier(() -> serializer.deserialize(result)),
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LLUtils::finalizeResource
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);
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}
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public Mono<Void> set(int value) {
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return singleton.set(Mono.fromCallable(() -> {
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var buf = singleton.getAllocator().allocate(Integer.BYTES);
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try {
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serializer.serialize(value, buf);
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return buf;
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} catch (Throwable ex) {
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buf.close();
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throw ex;
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}
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}));
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}
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@Override
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public String getDatabaseName() {
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return singleton.getDatabaseName();
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}
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}
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