Database Reference
In-Depth Information
We have annotated our repository with
@Repository
so that the Spring frame-
work can consider it as a Spring managed repository and inject all the required
implementations of common CRUD operations, traversing and indexing.
2. Now, let's modify our
Application-Config.xml
file and add the following
piece of configuration anywhere between the
<beans></beans>
tags:
<neo4j:repositories
base-package="org.neo4j.spring.samples.repositories"/>
The preceding configuration provides the framework with the location and pack-
age of user-defined repositories. Spring framework will further scan the provided
package, that is,
org.neo4j.spring.samples.repositories
and
search for all interfaces that are marked with
@Repository
and will inject the
implementation required for performing CRUD and other search operations.
3. Next, let's enhance
PersistNeo4JData
and define the
getAllMovies()
method and add
@Autowired MovieRepository movieRepo;
as an in-
stance variable.
@Autowire
will instruct the Spring framework to automatically
create the object of implementation provided for the
MovieRepository
inter-
face—or its parent interface, that is,
GraphRepository
—and assign its refer-
ence to the given variable.
4. Import
java.util.Iterator
as an additional package in
Persis-
tNeo4JData
.
5. Let's see the implementation of the
getAllMovies()
method that is very
simple and straightforward:
@Transactional
public void getAllMovies() {
Iterator<Movie> iterator =
movieRepo.findAll().iterator();
System.out.println("\n Start Dumping
Movies.............\n");
while (iterator.hasNext()) {
Movie movie = iterator.next();
System.out.println(" Movies ---> ID = " +
movie.getId() + ", Graph ID = "+ movie.getGraphId() +
", Title = " + movie.getTitle() + ", Year of Release
= " + movie.getYear());
