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Better define count method

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This commit is contained in:
Andrea Cavalli 2021-02-24 16:43:07 +01:00
parent af47584803
commit 3366c52b24
7 changed files with 20 additions and 10 deletions
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6
src/example/java/it.cavallium.dbengine.client/SpeedExample.java
View File

@ -302,7 +302,7 @@ public class SpeedExample {
numRepeats,
tuple -> Mono
.fromRunnable(() -> System.out.println("Calculating size"))
.then(tuple.getT2().size(null, false))
.then(tuple.getT2().leavesCount(null, false))
.doOnNext(s -> System.out.println("Size after: " + s))
.then(tuple.getT1().close())
);
@ -400,7 +400,7 @@ public class SpeedExample {
numRepeats,
tuple -> Mono
.fromRunnable(() -> System.out.println("Calculating size"))
.then(tuple.getT2().size(null, false))
.then(tuple.getT2().leavesCount(null, false))
.doOnNext(s -> System.out.println("Size after: " + s))
.then(tuple.getT1().close())
);
@ -429,7 +429,7 @@ public class SpeedExample {
numRepeats,
tuple -> Mono
.fromRunnable(() -> System.out.println("Calculating size"))
.then(tuple.getT2().size(null, false))
.then(tuple.getT2().leavesCount(null, false))
.doOnNext(s -> System.out.println("Size after: " + s))
.then(tuple.getT1().close())
);

2
src/main/java/it/cavallium/dbengine/database/collections/DatabaseMapDictionary.java
View File

@ -87,7 +87,7 @@ public class DatabaseMapDictionary<T, U> extends DatabaseMapDictionaryDeep<T, U,
}
@Override
public Mono<Long> size(@Nullable CompositeSnapshot snapshot, boolean fast) {
public Mono<Long> leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast) {
return dictionary.sizeRange(resolveSnapshot(snapshot), range, fast);
}

5
src/main/java/it/cavallium/dbengine/database/collections/DatabaseMapDictionaryDeep.java
View File

@ -174,6 +174,11 @@ public class DatabaseMapDictionaryDeep<T, U, US extends DatabaseStage<U>> implem
return LLRange.of(first, end);
}
@Override
public Mono<Long> leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast) {
return dictionary.sizeRange(resolveSnapshot(snapshot), range, fast);
}
@SuppressWarnings("ReactiveStreamsUnusedPublisher")
@Override
public Mono<US> at(@Nullable CompositeSnapshot snapshot, T keySuffix) {

2
src/main/java/it/cavallium/dbengine/database/collections/DatabaseSingle.java
View File

@ -54,7 +54,7 @@ public class DatabaseSingle<U> implements DatabaseStageEntry<U> {
}
@Override
public Mono<Long> size(@Nullable CompositeSnapshot snapshot, boolean fast) {
public Mono<Long> leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast) {
return dictionary
.isRangeEmpty(resolveSnapshot(snapshot), LLRange.single(key))
.map(empty -> empty ? 0L : 1L);

4
src/main/java/it/cavallium/dbengine/database/collections/DatabaseSingleMapped.java
View File

@ -68,8 +68,8 @@ public class DatabaseSingleMapped<U> implements DatabaseStageEntry<U> {
}
@Override
public Mono<Long> size(@Nullable CompositeSnapshot snapshot, boolean fast) {
return serializedSingle.size(snapshot, fast);
public Mono<Long> leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast) {
return serializedSingle.leavesCount(snapshot, fast);
}
@Override

9
src/main/java/it/cavallium/dbengine/database/collections/DatabaseStage.java
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@ -41,9 +41,14 @@ public interface DatabaseStage<T> extends DatabaseStageWithEntry<T> {
return Mono.empty();
}
Mono<Long> size(@Nullable CompositeSnapshot snapshot, boolean fast);
/**
* Count all the elements.
* If it's a nested collection the count will include all the children recursively
* @param fast true to return an approximate value
*/
Mono<Long> leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast);
default Mono<Boolean> isEmpty(@Nullable CompositeSnapshot snapshot) {
return size(snapshot, false).map(size -> size <= 0);
return leavesCount(snapshot, false).map(size -> size <= 0);
}
}

2
src/main/java/it/cavallium/dbengine/database/collections/DatabaseStageMap.java
View File

@ -136,7 +136,7 @@ public interface DatabaseStageMap<T, U, US extends DatabaseStage<U>> extends Dat
}
@Override
default Mono<Long> size(@Nullable CompositeSnapshot snapshot, boolean fast) {
default Mono<Long> leavesCount(@Nullable CompositeSnapshot snapshot, boolean fast) {
return getAllStages(snapshot).count();
}