263 lines
8.9 KiB
Java
263 lines
8.9 KiB
Java
package it.cavallium.dbengine.database.collections;
|
|
|
|
import io.netty.buffer.ByteBuf;
|
|
import it.cavallium.dbengine.client.CompositeSnapshot;
|
|
import it.cavallium.dbengine.database.Delta;
|
|
import it.cavallium.dbengine.database.LLUtils;
|
|
import it.cavallium.dbengine.database.UpdateMode;
|
|
import it.cavallium.dbengine.database.UpdateReturnMode;
|
|
import it.cavallium.dbengine.database.collections.Joiner.ValueGetter;
|
|
import it.cavallium.dbengine.database.collections.JoinerBlocking.ValueGetterBlocking;
|
|
import java.util.HashMap;
|
|
import java.util.Map;
|
|
import java.util.Map.Entry;
|
|
import java.util.Objects;
|
|
import java.util.Optional;
|
|
import java.util.function.Function;
|
|
import org.jetbrains.annotations.Nullable;
|
|
import reactor.core.publisher.Flux;
|
|
import reactor.core.publisher.Mono;
|
|
import reactor.util.function.Tuple2;
|
|
import reactor.util.function.Tuple3;
|
|
import reactor.util.function.Tuples;
|
|
|
|
@SuppressWarnings("unused")
|
|
public interface DatabaseStageMap<T, U, US extends DatabaseStage<U>> extends DatabaseStageEntry<Map<T, U>> {
|
|
|
|
Mono<US> at(@Nullable CompositeSnapshot snapshot, T key);
|
|
|
|
default Mono<U> getValue(@Nullable CompositeSnapshot snapshot, T key, boolean existsAlmostCertainly) {
|
|
return this.at(snapshot, key).flatMap(v -> v.get(snapshot, existsAlmostCertainly).doAfterTerminate(v::release));
|
|
}
|
|
|
|
default Mono<U> getValue(@Nullable CompositeSnapshot snapshot, T key) {
|
|
return getValue(snapshot, key, false);
|
|
}
|
|
|
|
default Mono<U> getValueOrDefault(@Nullable CompositeSnapshot snapshot, T key, Mono<U> defaultValue) {
|
|
return getValue(snapshot, key).switchIfEmpty(defaultValue).single();
|
|
}
|
|
|
|
default Mono<Void> putValue(T key, U value) {
|
|
return at(null, key).single().flatMap(v -> v.set(value).doAfterTerminate(v::release));
|
|
}
|
|
|
|
Mono<UpdateMode> getUpdateMode();
|
|
|
|
default Mono<U> updateValue(T key, UpdateReturnMode updateReturnMode, boolean existsAlmostCertainly, Function<@Nullable U, @Nullable U> updater) {
|
|
return this
|
|
.at(null, key)
|
|
.single()
|
|
.flatMap(v -> v
|
|
.update(updater, updateReturnMode, existsAlmostCertainly)
|
|
.doAfterTerminate(v::release)
|
|
);
|
|
}
|
|
|
|
default Mono<U> updateValue(T key, UpdateReturnMode updateReturnMode, Function<@Nullable U, @Nullable U> updater) {
|
|
return updateValue(key, updateReturnMode, false, updater);
|
|
}
|
|
|
|
default Mono<Boolean> updateValue(T key, Function<@Nullable U, @Nullable U> updater) {
|
|
return updateValueAndGetDelta(key, false, updater).map(LLUtils::isDeltaChanged).single();
|
|
}
|
|
|
|
default Mono<Boolean> updateValue(T key, boolean existsAlmostCertainly, Function<@Nullable U, @Nullable U> updater) {
|
|
return updateValueAndGetDelta(key, existsAlmostCertainly, updater).map(LLUtils::isDeltaChanged).single();
|
|
}
|
|
|
|
default Mono<Delta<U>> updateValueAndGetDelta(T key, boolean existsAlmostCertainly, Function<@Nullable U, @Nullable U> updater) {
|
|
return this
|
|
.at(null, key)
|
|
.single()
|
|
.flatMap(v -> v
|
|
.updateAndGetDelta(updater, existsAlmostCertainly)
|
|
.doAfterTerminate(v::release)
|
|
);
|
|
}
|
|
|
|
default Mono<Delta<U>> updateValueAndGetDelta(T key, Function<@Nullable U, @Nullable U> updater) {
|
|
return updateValueAndGetDelta(key, false, updater);
|
|
}
|
|
|
|
default Mono<U> putValueAndGetPrevious(T key, U value) {
|
|
return at(null, key).single().flatMap(v -> v.setAndGetPrevious(value).doAfterTerminate(v::release));
|
|
}
|
|
|
|
/**
|
|
*
|
|
* @param key
|
|
* @param value
|
|
* @return true if the key was associated with any value, false if the key didn't exist.
|
|
*/
|
|
default Mono<Boolean> putValueAndGetChanged(T key, U value) {
|
|
return at(null, key).single().flatMap(v -> v.setAndGetChanged(value).doAfterTerminate(v::release)).single();
|
|
}
|
|
|
|
default Mono<Void> remove(T key) {
|
|
return removeAndGetStatus(key).then();
|
|
}
|
|
|
|
default Mono<U> removeAndGetPrevious(T key) {
|
|
return at(null, key).flatMap(v -> v.clearAndGetPrevious().doAfterTerminate(v::release));
|
|
}
|
|
|
|
default Mono<Boolean> removeAndGetStatus(T key) {
|
|
return removeAndGetPrevious(key).map(o -> true).defaultIfEmpty(false);
|
|
}
|
|
|
|
default Flux<Entry<T, U>> getMulti(@Nullable CompositeSnapshot snapshot, Flux<T> keys, boolean existsAlmostCertainly) {
|
|
return keys.flatMapSequential(key -> this
|
|
.getValue(snapshot, key, existsAlmostCertainly)
|
|
.map(value -> Map.entry(key, value)));
|
|
}
|
|
|
|
default Flux<Entry<T, U>> getMulti(@Nullable CompositeSnapshot snapshot, Flux<T> keys) {
|
|
return getMulti(snapshot, keys, false);
|
|
}
|
|
|
|
default Mono<Void> putMulti(Flux<Entry<T, U>> entries) {
|
|
return entries.flatMap(entry -> this.putValue(entry.getKey(), entry.getValue())).then();
|
|
}
|
|
|
|
Flux<Entry<T, US>> getAllStages(@Nullable CompositeSnapshot snapshot);
|
|
|
|
default Flux<Entry<T, U>> getAllValues(@Nullable CompositeSnapshot snapshot) {
|
|
return this
|
|
.getAllStages(snapshot)
|
|
.flatMapSequential(entry -> entry
|
|
.getValue()
|
|
.get(snapshot, true)
|
|
.map(value -> Map.entry(entry.getKey(), value))
|
|
.doAfterTerminate(() -> entry.getValue().release())
|
|
);
|
|
}
|
|
|
|
default Mono<Void> setAllValues(Flux<Entry<T, U>> entries) {
|
|
return setAllValuesAndGetPrevious(entries).then();
|
|
}
|
|
|
|
Flux<Entry<T, U>> setAllValuesAndGetPrevious(Flux<Entry<T, U>> entries);
|
|
|
|
default Mono<Void> clear() {
|
|
return setAllValues(Flux.empty());
|
|
}
|
|
|
|
default Mono<Void> replaceAllValues(boolean canKeysChange, Function<Entry<T, U>, Mono<Entry<T, U>>> entriesReplacer) {
|
|
if (canKeysChange) {
|
|
return this.setAllValues(this.getAllValues(null).flatMap(entriesReplacer)).then();
|
|
} else {
|
|
return this
|
|
.getAllValues(null)
|
|
.flatMap(entriesReplacer)
|
|
.flatMap(replacedEntry -> this
|
|
.at(null, replacedEntry.getKey())
|
|
.flatMap(v -> v.set(replacedEntry.getValue()).doAfterTerminate(v::release)))
|
|
.then();
|
|
}
|
|
}
|
|
|
|
default Mono<Void> replaceAll(Function<Entry<T, US>, Mono<Void>> entriesReplacer) {
|
|
return this
|
|
.getAllStages(null)
|
|
.flatMap(stage -> Mono
|
|
.defer(() -> entriesReplacer.apply(stage))
|
|
.doAfterTerminate(() -> stage.getValue().release())
|
|
)
|
|
.then();
|
|
}
|
|
|
|
@Override
|
|
default Mono<Map<T, U>> setAndGetPrevious(Map<T, U> value) {
|
|
return this
|
|
.setAllValuesAndGetPrevious(Flux.fromIterable(value.entrySet()))
|
|
.collectMap(Entry::getKey, Entry::getValue, HashMap::new);
|
|
}
|
|
|
|
@Override
|
|
default Mono<Boolean> setAndGetChanged(Map<T, U> value) {
|
|
return this
|
|
.setAndGetPrevious(value)
|
|
.map(oldValue -> !Objects.equals(oldValue, value))
|
|
.switchIfEmpty(Mono.fromSupplier(() -> !value.isEmpty()));
|
|
}
|
|
|
|
@Override
|
|
default Mono<Delta<Map<T, U>>> updateAndGetDelta(Function<@Nullable Map<T, U>, @Nullable Map<T, U>> updater,
|
|
boolean existsAlmostCertainly) {
|
|
return this
|
|
.getUpdateMode()
|
|
.single()
|
|
.flatMap(updateMode -> {
|
|
if (updateMode == UpdateMode.ALLOW_UNSAFE) {
|
|
return this
|
|
.getAllValues(null)
|
|
.collectMap(Entry::getKey, Entry::getValue, HashMap::new)
|
|
.single()
|
|
.<Tuple2<Optional<Map<T, U>>, Optional<Map<T, U>>>>handle((v, sink) -> {
|
|
if (v.isEmpty()) {
|
|
v = null;
|
|
}
|
|
var result = updater.apply(v);
|
|
if (result != null && result.isEmpty()) {
|
|
result = null;
|
|
}
|
|
sink.next(Tuples.of(Optional.ofNullable(v), Optional.ofNullable(result)));
|
|
})
|
|
.flatMap(result -> Mono
|
|
.justOrEmpty(result.getT2())
|
|
.flatMap(values -> this.setAllValues(Flux.fromIterable(values.entrySet())))
|
|
.thenReturn(new Delta<>(result.getT1().orElse(null), result.getT2().orElse(null)))
|
|
);
|
|
} else if (updateMode == UpdateMode.ALLOW) {
|
|
return Mono.fromCallable(() -> {
|
|
throw new UnsupportedOperationException("Maps can't be updated atomically");
|
|
});
|
|
} else if (updateMode == UpdateMode.DISALLOW) {
|
|
return Mono.fromCallable(() -> {
|
|
throw new UnsupportedOperationException("Map can't be updated because updates are disabled");
|
|
});
|
|
} else {
|
|
return Mono.fromCallable(() -> {
|
|
throw new UnsupportedOperationException("Unknown update mode: " + updateMode);
|
|
});
|
|
}
|
|
});
|
|
}
|
|
|
|
@Override
|
|
default Mono<Map<T, U>> clearAndGetPrevious() {
|
|
return this.setAndGetPrevious(Map.of());
|
|
}
|
|
|
|
@Override
|
|
default Mono<Map<T, U>> get(@Nullable CompositeSnapshot snapshot, boolean existsAlmostCertainly) {
|
|
return getAllValues(snapshot)
|
|
.collectMap(Entry::getKey, Entry::getValue, HashMap::new);
|
|
}
|
|
|
|
@Override
|
|
default Mono<Long> leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast) {
|
|
return getAllStages(snapshot)
|
|
.flatMap(stage -> Mono
|
|
.fromRunnable(() -> stage.getValue().release())
|
|
.thenReturn(true)
|
|
)
|
|
.count();
|
|
}
|
|
|
|
/**
|
|
* Value getter doesn't lock data. Please make sure to lock before getting data.
|
|
*/
|
|
default ValueGetterBlocking<T, U> getDbValueGetter(@Nullable CompositeSnapshot snapshot) {
|
|
return k -> getValue(snapshot, k).block();
|
|
}
|
|
|
|
/**
|
|
* Value getter doesn't lock data. Please make sure to lock before getting data.
|
|
*/
|
|
default ValueGetter<T, U> getAsyncDbValueGetter(@Nullable CompositeSnapshot snapshot) {
|
|
return k -> getValue(snapshot, k);
|
|
}
|
|
}
|