#370 - Added example of how to use Vavr's Try.

Temporarily upgrade to Lovelace to make use of the new Try support

jpa/vavr/pom.xml

@@ -10,6 +10,10 @@
 
 	<artifactId>spring-data-jpa-vavr</artifactId>
 	<name>Spring Data JPA - Vavr integration</name>
+	
+	<properties>
+		<spring-data-releasetrain.version>Lovelace-BUILD-SNAPSHOT</spring-data-releasetrain.version>
+	</properties>
 
 	<dependencies>
 		<dependency>

jpa/vavr/src/main/java/example/PersonRepository.java

@@ -19,6 +19,7 @@ import io.vavr.collection.Map;
 import io.vavr.collection.Seq;
 import io.vavr.collection.Set;
 import io.vavr.control.Option;
+import io.vavr.control.Try;
 
 import java.util.List;
 import java.util.Optional;
@@ -51,4 +52,12 @@ public interface PersonRepository extends Repository<Person, Long> {
 	 * @return
 	 */
 	Seq<Person> findByFirstnameContaining(String firstname);
+
+	/**
+	 * Returning a {@link Try} is supported out of the box with all exceptions being handled by {@link Try} immediately.
+	 * 
+	 * @param lastname
+	 * @return
+	 */
+	Try<Option<Person>> findByLastnameContaining(String lastname);
 }

jpa/vavr/src/test/java/example/PersonRepositoryIntegrationTests.java

@@ -19,6 +19,9 @@ import static org.assertj.core.api.Assertions.*;
 
 import io.vavr.collection.Seq;
 import io.vavr.control.Option;
+import io.vavr.control.Try;
+
+import javax.persistence.NonUniqueResultException;
 
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -71,4 +74,34 @@ public class PersonRepositoryIntegrationTests {
 		assertThat(result.contains(carter)).isTrue();
 		assertThat(result.contains(dave)).isFalse();
 	}
+
+	/**
+	 * @see #370
+	 */
+	@Test
+	public void returnsSuccessOfOption() {
+
+		Person dave = people.save(new Person("Dave", "Matthews"));
+		people.save(new Person("Carter", "Beauford"));
+
+		Try<Option<Person>> result = people.findByLastnameContaining("w");
+
+		assertThat(result.isSuccess()).isTrue();
+		assertThat(result.get()).contains(dave);
+	}
+
+	/**
+	 * @see #370
+	 */
+	@Test
+	public void returnsFailureOfOption() {
+
+		people.save(new Person("Dave", "Matthews"));
+		people.save(new Person("Carter", "Beauford"));
+
+		Try<Option<Person>> result = people.findByLastnameContaining("e");
+
+		assertThat(result.isFailure()).isTrue();
+		assertThat(result.getCause()).isInstanceOf(NonUniqueResultException.class);
+	}
 }