9a5c270ec2
Removed MongoDB dependency by adding Flapdoodle embedded MongoDB. That allows us to get rid of the utility module we had in place for the MongoDB samples guarding the tests to only run when a MongoDB instance is running. Tweaked Travis setup to not require the MongoDB service anymore.
Spring Data MongoDB - Java 8 examples
This project contains samples of Java 8 specific features of Spring Data (MongoDB).
Support for JDK 8's Stream for repository methods
Repository methods can use a Java 8 Stream as a return type which will cause the reading of the results and the to-object-conversion of the DBObject to happen while iterating over the stream.
public interface PersonRepository extends CrudRepository<Person, String> {
@Override
List<Person> findAll();
//Custom Query method returning a Java 8 Stream
@Query("{}")
Stream<Person> findAllByCustomQueryWithStream();
}
The test cases in PersonRepositoryIntegrationTest oppose a plain List based query method with one that uses a Stream and shows how the former pulls all data into memory first and the iteration is done over the pre-populated list. The execution of the Stream-based method in contrast shows that the individual elements are read and converted while iterating the stream.