Show how to use Limit with repository queries.

Add methods taking a Limit parameter to various samples.

Original pull request: #672
Closes #671

cassandra/reactive/src/main/java/example/springdata/cassandra/people/ReactivePersonRepository.java

@@ -15,6 +15,7 @@
  */
 package example.springdata.cassandra.people;
 
+import org.springframework.data.domain.Limit;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 
@@ -36,6 +37,15 @@ public interface ReactivePersonRepository extends ReactiveCrudRepository<Person,
 	 */
 	Flux<Person> findByLastname(String lastname);
 
+	/**
+	 * Derived query selecting by {@code lastname} reducing the result size to a given {@link Limit}.
+	 *
+	 * @param lastname
+	 * @param maxResults the maximum number of results returned.
+	 * @return
+	 */
+	Flux<Person> findByLastname(String lastname, Limit maxResults);
+
 	/**
 	 * String query selecting one entity.
 	 *

cassandra/reactive/src/test/java/example/springdata/cassandra/people/ReactivePersonRepositoryIntegrationTest.java

@@ -16,6 +16,7 @@
 package example.springdata.cassandra.people;
 
 import example.springdata.cassandra.util.CassandraKeyspace;
+import org.springframework.data.domain.Limit;
 import reactor.core.publisher.Flux;
 import reactor.core.publisher.Mono;
 import reactor.test.StepVerifier;
@@ -89,6 +90,14 @@ class ReactivePersonRepositoryIntegrationTest {
 		StepVerifier.create(repository.findByLastname("White")).expectNextCount(2).verifyComplete();
 	}
 
+	/**
+	 * Fetch data limiting result size.
+	 */
+	@Test
+	void limitResultSize() {
+		StepVerifier.create(repository.findByLastname("White", Limit.of(1))).expectNextCount(1).verifyComplete();
+	}
+
 	/**
 	 * Fetch data using a string query.
 	 */