50 lines
2.4 KiB
Java
50 lines
2.4 KiB
Java
package it.cavallium.dbengine.client;
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import io.netty.buffer.Unpooled;
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import it.cavallium.dbengine.database.Column;
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import it.cavallium.dbengine.database.collections.DatabaseMapDictionary;
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import it.cavallium.dbengine.database.collections.FixedLengthSerializer;
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import it.cavallium.dbengine.database.collections.SubStageGetterSingle;
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import it.cavallium.dbengine.database.disk.LLLocalDatabaseConnection;
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import java.nio.file.Path;
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import java.time.Duration;
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import java.time.Instant;
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import java.util.Arrays;
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import java.util.List;
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import reactor.core.publisher.Mono;
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import reactor.core.publisher.Sinks;
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import reactor.core.publisher.Sinks.One;
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public class Example {
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public static void main(String[] args) {
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System.out.println("Test");
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var ssg = new SubStageGetterSingle();
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var ser = FixedLengthSerializer.noop(4);
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var itemKey = new byte[] {0, 1, 2, 3};
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var newValue = new byte[] {4, 5, 6, 7};
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var itemKeyBuffer = Unpooled.wrappedBuffer(itemKey);
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One<Instant> instantFirst = Sinks.one();
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One<Instant> instantSecond = Sinks.one();
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One<Instant> instantThird = Sinks.one();
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new LLLocalDatabaseConnection(Path.of("/tmp/"), true)
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.connect()
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.flatMap(conn -> conn.getDatabase("testdb", List.of(Column.dictionary("testmap")), false))
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.flatMap(db -> db.getDictionary("testmap"))
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.map(dictionary -> new DatabaseMapDictionary<>(dictionary, ssg, ser, 10))
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.doOnSuccess(s -> System.out.println("Setting new value at key " + Arrays.toString(itemKey) + ": " + Arrays.toString(newValue)))
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.doOnSuccess(s -> instantFirst.tryEmitValue(Instant.now()))
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.flatMap(map -> map.at(null, itemKeyBuffer))
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.doOnSuccess(s -> instantSecond.tryEmitValue(Instant.now()))
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.flatMap(handle -> handle.setAndGetPrevious(newValue))
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.doOnSuccess(s -> instantThird.tryEmitValue(Instant.now()))
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.doOnSuccess(oldValue -> System.out.println("Old value: " + (oldValue == null ? "None" : Arrays.toString(oldValue))))
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.then(Mono.zip(instantFirst.asMono(), instantSecond.asMono(), instantThird.asMono()))
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.doOnSuccess(s -> {
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System.out.println("Time to get value reference: " + Duration.between(s.getT1(), s.getT2()).toMillis() + "ms");
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System.out.println("Time to set new value and get previous: " + Duration.between(s.getT2(), s.getT3()).toMillis() + "ms");
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System.out.println("(Total time) " + Duration.between(s.getT1(), s.getT3()).toMillis() + "ms");
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})
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.blockOptional();
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}
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} |