CavalliumDBEngine/src/main/java/it/cavallium/dbengine/database/collections/DatabaseSingleMapped.java

150 lines
4.2 KiB
Java
Raw Normal View History

2021-01-31 19:52:47 +01:00
package it.cavallium.dbengine.database.collections;
2021-06-26 02:35:33 +02:00
import it.cavallium.dbengine.client.BadBlock;
2021-01-31 19:52:47 +01:00
import it.cavallium.dbengine.client.CompositeSnapshot;
2021-09-02 17:15:40 +02:00
import it.cavallium.dbengine.client.Mapper;
2021-05-08 03:09:00 +02:00
import it.cavallium.dbengine.database.Delta;
import it.cavallium.dbengine.database.LLUtils;
import it.cavallium.dbengine.database.UpdateReturnMode;
2021-08-22 21:23:22 +02:00
import it.cavallium.dbengine.database.serialization.SerializationException;
import it.cavallium.dbengine.database.serialization.SerializationFunction;
2021-01-31 19:52:47 +01:00
import org.jetbrains.annotations.Nullable;
2021-06-26 02:35:33 +02:00
import reactor.core.publisher.Flux;
2021-01-31 19:52:47 +01:00
import reactor.core.publisher.Mono;
2021-08-22 21:23:22 +02:00
import reactor.core.publisher.SynchronousSink;
2021-01-31 19:52:47 +01:00
2021-04-12 17:09:55 +02:00
@SuppressWarnings("unused")
public class DatabaseSingleMapped<A, B> implements DatabaseStageEntry<A> {
2021-01-31 19:52:47 +01:00
2021-04-12 17:09:55 +02:00
private final DatabaseStageEntry<B> serializedSingle;
2021-09-02 17:15:40 +02:00
private final Mapper<A, B> mapper;
2021-01-31 19:52:47 +01:00
2021-09-02 17:15:40 +02:00
public DatabaseSingleMapped(DatabaseStageEntry<B> serializedSingle, Mapper<A, B> mapper) {
2021-01-31 19:52:47 +01:00
this.serializedSingle = serializedSingle;
2021-09-02 17:15:40 +02:00
this.mapper = mapper;
2021-01-31 19:52:47 +01:00
}
2021-08-22 21:23:22 +02:00
private void deserializeSink(B value, SynchronousSink<A> sink) {
try {
2021-09-02 17:15:40 +02:00
sink.next(this.unMap(value));
2021-08-22 21:23:22 +02:00
} catch (SerializationException ex) {
sink.error(ex);
}
}
2021-01-31 19:52:47 +01:00
@Override
2021-04-12 17:09:55 +02:00
public Mono<A> get(@Nullable CompositeSnapshot snapshot, boolean existsAlmostCertainly) {
2021-08-22 21:23:22 +02:00
return serializedSingle.get(snapshot, existsAlmostCertainly).handle(this::deserializeSink);
2021-01-31 19:52:47 +01:00
}
@Override
2021-04-12 17:09:55 +02:00
public Mono<A> getOrDefault(@Nullable CompositeSnapshot snapshot, Mono<A> defaultValue) {
2021-08-22 21:23:22 +02:00
return serializedSingle.get(snapshot).handle(this::deserializeSink).switchIfEmpty(defaultValue);
2021-01-31 19:52:47 +01:00
}
@Override
2021-04-12 17:09:55 +02:00
public Mono<Void> set(A value) {
2021-08-22 21:23:22 +02:00
return Mono
2021-09-02 17:15:40 +02:00
.fromCallable(() -> map(value))
2021-08-22 21:23:22 +02:00
.flatMap(serializedSingle::set);
2021-01-31 19:52:47 +01:00
}
@Override
2021-04-12 17:09:55 +02:00
public Mono<A> setAndGetPrevious(A value) {
2021-08-22 21:23:22 +02:00
return Mono
2021-09-02 17:15:40 +02:00
.fromCallable(() -> map(value))
2021-08-22 21:23:22 +02:00
.flatMap(serializedSingle::setAndGetPrevious)
.handle(this::deserializeSink);
2021-01-31 19:52:47 +01:00
}
@Override
public Mono<Boolean> setAndGetChanged(A value) {
2021-08-22 21:23:22 +02:00
return Mono
2021-09-02 17:15:40 +02:00
.fromCallable(() -> map(value))
2021-08-22 21:23:22 +02:00
.flatMap(serializedSingle::setAndGetChanged)
.single();
2021-01-31 19:52:47 +01:00
}
2021-02-06 19:21:31 +01:00
@Override
2021-08-22 21:23:22 +02:00
public Mono<A> update(SerializationFunction<@Nullable A, @Nullable A> updater,
2021-05-08 03:09:00 +02:00
UpdateReturnMode updateReturnMode,
boolean existsAlmostCertainly) {
return serializedSingle.update(oldValue -> {
2021-09-02 17:15:40 +02:00
var result = updater.apply(oldValue == null ? null : this.unMap(oldValue));
if (result == null) {
return null;
} else {
2021-09-02 17:15:40 +02:00
return this.map(result);
}
2021-08-22 21:23:22 +02:00
}, updateReturnMode, existsAlmostCertainly).handle(this::deserializeSink);
2021-05-08 03:09:00 +02:00
}
@Override
2021-08-22 21:23:22 +02:00
public Mono<Delta<A>> updateAndGetDelta(SerializationFunction<@Nullable A, @Nullable A> updater,
2021-05-08 03:09:00 +02:00
boolean existsAlmostCertainly) {
return serializedSingle.updateAndGetDelta(oldValue -> {
2021-09-02 17:15:40 +02:00
var result = updater.apply(oldValue == null ? null : this.unMap(oldValue));
2021-05-08 03:09:00 +02:00
if (result == null) {
return null;
} else {
2021-09-02 17:15:40 +02:00
return this.map(result);
2021-05-08 03:09:00 +02:00
}
2021-09-02 17:15:40 +02:00
}, existsAlmostCertainly).transform(mono -> LLUtils.mapDelta(mono, this::unMap));
2021-02-06 19:21:31 +01:00
}
2021-01-31 19:52:47 +01:00
@Override
public Mono<Void> clear() {
return serializedSingle.clear();
}
@Override
2021-04-12 17:09:55 +02:00
public Mono<A> clearAndGetPrevious() {
2021-08-22 21:23:22 +02:00
return serializedSingle.clearAndGetPrevious().handle(this::deserializeSink);
2021-01-31 19:52:47 +01:00
}
@Override
public Mono<Boolean> clearAndGetStatus() {
return serializedSingle.clearAndGetStatus();
}
@Override
public Mono<Void> close() {
return serializedSingle.close();
}
@Override
2021-02-24 16:43:07 +01:00
public Mono<Long> leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast) {
return serializedSingle.leavesCount(snapshot, fast);
2021-01-31 19:52:47 +01:00
}
@Override
public Mono<Boolean> isEmpty(@Nullable CompositeSnapshot snapshot) {
return serializedSingle.isEmpty(snapshot);
}
@Override
2021-04-12 17:09:55 +02:00
public DatabaseStageEntry<A> entry() {
2021-01-31 19:52:47 +01:00
return this;
}
2021-06-26 02:35:33 +02:00
@Override
public Flux<BadBlock> badBlocks() {
return this.serializedSingle.badBlocks();
}
@Override
public void release() {
serializedSingle.release();
}
2021-01-31 19:52:47 +01:00
//todo: temporary wrapper. convert the whole class to buffers
2021-09-02 17:15:40 +02:00
private A unMap(B bytes) throws SerializationException {
return mapper.unmap(bytes);
2021-01-31 19:52:47 +01:00
}
//todo: temporary wrapper. convert the whole class to buffers
2021-09-02 17:15:40 +02:00
private B map(A bytes) throws SerializationException {
return mapper.map(bytes);
2021-01-31 19:52:47 +01:00
}
}