Repository save() is not working - spring

Question

I am currently playing around with spring-data-neo4j and have a really weird behaviour around persisting data.
I read the Getting Started guide and looked through the Good Relationships: The Spring Data Neo4j Guide Book. Loading existing nodes works, after getting rid of smaller issues and imperfections (like using spring-ogm 1.1.4 to get rid of the neo4j-server dependency).
Let's have a look on my code...
This is entity:
package sdn.test.model;
import org.neo4j.ogm.annotation.GraphId;
import org.neo4j.ogm.annotation.NodeEntity;
#NodeEntity
public class TestUser {
#GraphId
private Long id;
private String username;
private String password;
public TestUser() {
}
public TestUser(Long id, String username, String password) {
this.id = id;
this.username = username;
this.password = password;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
TestUser testUser = (TestUser) o;
if (getId() != null ? !getId().equals(testUser.getId()) : testUser.getId() != null) return false;
if (getUsername() != null ? !getUsername().equals(testUser.getUsername()) : testUser.getUsername() != null)
return false;
return getPassword() != null ? getPassword().equals(testUser.getPassword()) : testUser.getPassword() == null;
}
#Override
public int hashCode() {
int result = getId() != null ? getId().hashCode() : 0;
result = 31 * result + (getUsername() != null ? getUsername().hashCode() : 0);
result = 31 * result + (getPassword() != null ? getPassword().hashCode() : 0);
return result;
}
#Override
public String toString() {
return "TestUser{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
"}";
}
}
And this is my repository:
package sdn.test.repository;
import org.springframework.data.neo4j.annotation.Query;
import org.springframework.data.neo4j.repository.GraphRepository;
import org.springframework.data.repository.query.Param;
import org.springframework.stereotype.Repository;
import sdn.test.model.TestUser;
#Repository
public interface UserRepository extends GraphRepository<TestUser> {
#Query("MATCH (user:TestUser{username: {username}, password: {password}}) RETURN user")
TestUser findByUsernameAndPassword(#Param("username") String username, #Param("password") String password);
}
Here is the neo4j configuration:
package sdn.test.config;
import org.neo4j.ogm.session.SessionFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.neo4j.config.Neo4jConfiguration;
import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
import org.springframework.data.neo4j.server.Neo4jServer;
import org.springframework.data.neo4j.server.RemoteServer;
import org.springframework.transaction.annotation.EnableTransactionManagement;
#Configuration
#EnableNeo4jRepositories("sdn.test.repository")
#EnableTransactionManagement
public class Neo4jConfig extends Neo4jConfiguration {
#Bean
#Override
public Neo4jServer neo4jServer() {
return new RemoteServer("http://localhost:7474", "neo4j", "test");
}
#Bean
#Override
public SessionFactory getSessionFactory() {
return new SessionFactory("sdn.test.model");
}
}
Everything together lives in a simple Spring Boot application and I try to do the entity creation in this test class:
package sdn.test;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.SpringApplicationConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import sdn.test.config.Neo4jConfig;
import sdn.test.model.TestUser;
import sdn.test.repository.UserRepository;
import java.util.Date;
import static org.hamcrest.CoreMatchers.equalTo;
import static org.hamcrest.MatcherAssert.assertThat;
#RunWith(SpringJUnit4ClassRunner.class)
#SpringApplicationConfiguration(classes = {
Neo4jConfig.class})
public class SimpleNeo4jTests {
#Autowired
private UserRepository userRepository;
#Test
public void createNewUser() {
long timeOffset = (new Date()).getTime();
String username = "test" + timeOffset;
String password = "password#" + timeOffset;
TestUser newUser = new TestUser(timeOffset, username, password);
userRepository.save(newUser);
// Try to load the user
TestUser actualUser = userRepository.findByUsernameAndPassword(username, password);
assertThat(actualUser, equalTo(newUser));
}
}
Last but not least, here is my pom.xml:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>net.h0lg.test</groupId>
<artifactId>simple-sdn4-test</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.3.2.RELEASE</version>
</parent>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
</dependency>
<dependency>
<groupId>org.neo4j</groupId>
<artifactId>neo4j-ogm</artifactId>
<version>1.1.4</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-neo4j</artifactId>
<version>4.0.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
There is no error thrown when I call userRepository.save() and checking the "remote" server confirms the red test result.
Explicitly giving the label name with #GraphEntity(label = "TestUser") doesn't help. Using transactions explicitly didn't help either.
Any ideas and hints are highly appreciated.

Answer 1

Looks like you're setting the #GraphId of your TestUser node entity via the test:
TestUser newUser = new TestUser(timeOffset, username, password);
public TestUser(Long id, String username, String password) {
this.id = id;
this.username = username;
this.password = password;
}
Application code should never assign a value to the #GraphId. Could you remove that and see if it helps?