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DATACMNS-1063 - Accept Publisher in ReactiveCrudRepository findById(…) and existsById(…).

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We now accept Publisher<T> instead of Mono<T> in findById(…) and existsById(…). Users of a ReactiveStreams-based framework are no longer required to perform Publisher to Mono-adoption themselves but can pass a Publisher directly. Both methods use the first emitted value to issue their queries. Additional values are not consumed from the stream.

Original Pull Request: #226
This commit is contained in:
Mark Paluch
2017-06-09 11:08:48 +02:00
committed by Christoph Strobl
parent f0fa12340a
commit 9f1af1fb09
2 changed files with 9 additions and 7 deletions
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9
src/main/java/org/springframework/data/repository/reactive/ReactiveCrudRepository.java
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@@ -73,11 +73,11 @@ public interface ReactiveCrudRepository<T, ID> extends Repository<T, ID> {
/**
* Retrieves an entity by its id supplied by a {@link Mono}.
*
* @param id must not be {@literal null}.
* @param id must not be {@literal null}. Uses the first emitted element to perform the find-query.
* @return the entity with the given id or {@link Mono#empty()} if none found.
* @throws IllegalArgumentException if {@code id} is {@literal null}.
*/
Mono<T> findById(Mono<ID> id);
Mono<T> findById(Publisher<ID> id);
/**
* Returns whether an entity with the given id exists.
@@ -89,13 +89,14 @@ public interface ReactiveCrudRepository<T, ID> extends Repository<T, ID> {
Mono<Boolean> existsById(ID id);
/**
* Returns whether an entity with the given id, supplied by a {@link Mono}, exists.
* Returns whether an entity with the given id, supplied by a {@link Mono}, exists. Uses the first emitted element to
* perform the exists-query.
*
* @param id must not be {@literal null}.
* @return {@literal true} if an entity with the given id exists, {@literal false} otherwise
* @throws IllegalArgumentException if {@code id} is {@literal null}
*/
Mono<Boolean> existsById(Mono<ID> id);
Mono<Boolean> existsById(Publisher<ID> id);
/**
* Returns all instances of the type.