Spring Data Neo4J Database Connection

Question

I am trying to connect to Neo4J database using Spring Data With following link (http://projects.spring.io/spring-data-neo4j/#quick-start). But it doesn't seem to work. Its not able to create Repository Implementation by itself. Thats why I am getting BeanCreationException. Here what I have tried so far.

PersistenceContext.java

@Configuration
@EnableTransactionManagement
@ComponentScan("com.ksh.neo4j")
@EnableNeo4jRepositories("com.ksh.neo4j.repositories")
public class PersistenceContext  {

  @Bean
  public org.neo4j.ogm.config.Configuration getConfiguration() 
  {
      org.neo4j.ogm.config.Configuration configuration = new org.neo4j.ogm.config.Configuration();
      configuration.driverConfiguration()
                   .setDriverClassName("org.neo4j.ogm.drivers.http.driver.HttpDriver")
                   .setURI("http://localhost:7474");
      return configuration;
  }
  @Bean
  public Neo4jTransactionManager transactionManager() {
      return new Neo4jTransactionManager(getSessionFactory());
  }
  @Bean
  public SessionFactory getSessionFactory() {
      return new SessionFactory("com.ksh.neo4j.domains");
  }
}

PersonRepository.java

@Repository
public interface PersonRepository extends GraphRepository<Person> {
}

PersonService.java

@Service
public class PersonService {  
  @Autowired
  private PersonRepository personRepository;

  public Person save(Person person) {
      return personRepository.save(person);
  }
}

PersonController.java

@RestController
@RequestMapping("/person/**")
public class PersonController {
  @Autowired
  private PersonService personService;

  @RequestMapping("/save")
  public ResponseObject save(@RequestBody Person person) 
  {
      try {
          personService.save(person);
          return ResponseObjectCreator.createResponseObj(ResponseStatus.SUCSESS);
      }
      catch (Exception e) {
          e.printStackTrace();
      }
      return ResponseObjectCreator.createResponseObj(ResponseStatus.FAILURE); 
  }
}

WebMvcConfig.java

 @Configuration
    @EnableWebMvc
    @ComponentScan(basePackages = {"com.ksh.neo4j.controllers", "com.ksh.neo4j"})
    public class WebMvcConfig extends WebMvcConfigurerAdapter {]
      @Override
      public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) {
          configurer.enable();
      }
    }

POM.xml

<dependency>
  <groupId>org.springframework.data</groupId>
  <artifactId>spring-data-commons</artifactId>
  <version>1.13.1.RELEASE</version>
</dependency>
<dependency>
  <groupId>org.springframework.data</groupId>
  <artifactId>spring-data-neo4j</artifactId>
  <version>4.2.1.RELEASE</version>
</dependency>
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-web</artifactId>
  <version>4.3.7.RELEASE</version>
</dependency>
<dependency>
  <groupId>org.springframework</groupId>
  <artifactId>spring-webmvc</artifactId>
  <version>4.3.7.RELEASE</version>
</dependency>
<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.1.0</version>
  <scope>compile</scope>
</dependency>
<dependency>
  <groupId>org.neo4j</groupId>
  <artifactId>neo4j-ogm-embedded-driver</artifactId>
  <version>2.1.2</version>
</dependency>
<dependency>
  <groupId>org.neo4j</groupId>
  <artifactId>neo4j-ogm-core</artifactId>
  <version>2.1.1</version>
</dependency>
<dependency>
  <groupId>org.neo4j</groupId>
  <artifactId>neo4j-ogm-http-driver</artifactId>
  <version>2.1.1</version>
</dependency>
<dependency>
  <groupId>org.neo4j</groupId>
  <artifactId>neo4j-kernel</artifactId>
  <version>3.1.3</version>
</dependency>
<dependency>
  <groupId>org.neo4j.app</groupId>
  <artifactId>neo4j-server</artifactId>
  <version>3.1.3</version>
</dependency>

I am getting following exception

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.neo4j.ogm.session.SessionFactory]: Factory method 'getSessionFactory' threw exception; nested exception is org.neo4j.ogm.exception.ServiceNotFoundException: Could not load driver: null.

Any Help Will Be Good.

František Hartman František Hartman · Accepted Answer · 2017-04-19T11:01:14

You didn't say which version you are using, but if you are using 4.2.1 then the quick start seems to be missing transaction manager definition:

Add following to your PersistenceContext class:

@Bean
public Neo4jTransactionManager transactionManager() {
    return new Neo4jTransactionManager(sessionFactory());
}

Please refer to spring-data-neo4j documentation for further details.

http://docs.spring.io/spring-data/data-neo4j/docs/current/reference/html/#reference.getting_started.spring-configuration

Spring Data Neo4J Database Connection

1 Answers