Merge pull request #467 from sameira/master
Adding Spring Data Neo4J Code Sample
This commit is contained in:
Eugen
GitHub
commit
1ea5205dae
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## Spring Data Neo4j
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### Relevant Articles:
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- [Introduction to Spring Data Neo4j](http://www.baeldung.com/spring-data-neo4j-tutorial)
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### Build the Project with Tests Running
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```
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mvn clean install
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```
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### Run Tests Directly
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```
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mvn test
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```
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>com.baeldung</groupId>
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<artifactId>spring-data-neo4j</artifactId>
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<version>1.0</version>
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<packaging>jar</packaging>
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<properties>
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<java.version>1.8</java.version>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
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<neo4j.version>3.0.1</neo4j.version>
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<spring-data-neo4j.version>4.1.1.RELEASE</spring-data-neo4j.version>
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</properties>
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<dependencies>
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<dependency>
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<groupId>org.springframework.data</groupId>
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<artifactId>spring-data-neo4j</artifactId>
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<version>${spring-data-neo4j.version}</version>
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</dependency>
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<dependency>
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<groupId>com.voodoodyne.jackson.jsog</groupId>
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<artifactId>jackson-jsog</artifactId>
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<version>1.1</version>
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<scope>compile</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-test</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.springframework.data</groupId>
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<artifactId>spring-data-neo4j</artifactId>
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<version>${spring-data-neo4j.version}</version>
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<type>test-jar</type>
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</dependency>
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<dependency>
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<groupId>org.neo4j</groupId>
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<artifactId>neo4j-kernel</artifactId>
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<version>${neo4j.version}</version>
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<type>test-jar</type>
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</dependency>
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<dependency>
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<groupId>org.neo4j.app</groupId>
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<artifactId>neo4j-server</artifactId>
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<version>${neo4j.version}</version>
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<type>test-jar</type>
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</dependency>
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<dependency>
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<groupId>org.neo4j</groupId>
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<artifactId>neo4j-ogm-test</artifactId>
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<version>2.0.2</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.neo4j.test</groupId>
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<artifactId>neo4j-harness</artifactId>
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<version>${neo4j.version}</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.12</version>
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</dependency>
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<dependency>
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<groupId>org.springframework</groupId>
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<artifactId>spring-test</artifactId>
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<version>4.2.3.RELEASE</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<artifactId>maven-compiler-plugin</artifactId>
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</plugin>
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</plugins>
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</build>
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</project>
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package com.baeldung.spring.data.neo4j.config;
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import org.neo4j.ogm.session.SessionFactory;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.data.neo4j.config.Neo4jConfiguration;
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import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
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import org.springframework.scheduling.annotation.EnableScheduling;
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import org.springframework.transaction.annotation.EnableTransactionManagement;
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@ComponentScan(basePackages = {"com.baeldung.spring.data.neo4j.services"})
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@Configuration
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@EnableNeo4jRepositories(basePackages = "com.baeldung.spring.data.neo4j.repostory")
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public class MovieDatabaseNeo4jConfiguration extends Neo4jConfiguration {
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public static final String URL = System.getenv("NEO4J_URL") != null ? System.getenv("NEO4J_URL") : "http://neo4j:movies@localhost:7474";
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@Bean
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public org.neo4j.ogm.config.Configuration getConfiguration() {
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org.neo4j.ogm.config.Configuration config = new org.neo4j.ogm.config.Configuration();
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config
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.driverConfiguration()
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.setDriverClassName("org.neo4j.ogm.drivers.http.driver.HttpDriver")
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.setURI(URL);
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return config;
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}
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@Override
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public SessionFactory getSessionFactory() {
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return new SessionFactory(getConfiguration(), "com.baeldung.spring.data.neo4j.domain");
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}
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}
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package com.baeldung.spring.data.neo4j.config;
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import org.neo4j.ogm.session.SessionFactory;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.ComponentScan;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.context.annotation.Profile;
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import org.springframework.data.neo4j.config.Neo4jConfiguration;
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import org.springframework.data.neo4j.repository.config.EnableNeo4jRepositories;
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import org.springframework.data.neo4j.server.Neo4jServer;
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import org.springframework.transaction.annotation.EnableTransactionManagement;
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@EnableTransactionManagement
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@ComponentScan(basePackages = {"com.baeldung.spring.data.neo4j.services"})
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@Configuration
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@EnableNeo4jRepositories(basePackages = "com.baeldung.spring.data.neo4j.repostory")
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@Profile({"embedded", "test"})
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public class MovieDatabaseNeo4jTestConfiguration extends Neo4jConfiguration {
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@Bean
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public org.neo4j.ogm.config.Configuration getConfiguration() {
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org.neo4j.ogm.config.Configuration config = new org.neo4j.ogm.config.Configuration();
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config
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.driverConfiguration()
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.setDriverClassName("org.neo4j.ogm.drivers.embedded.driver.EmbeddedDriver");
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return config;
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}
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@Override
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public SessionFactory getSessionFactory() {
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return new SessionFactory(getConfiguration(), "com.baeldung.spring.data.neo4j.domain");
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}
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}
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package com.baeldung.spring.data.neo4j.domain;
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import com.fasterxml.jackson.annotation.JsonIdentityInfo;
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import com.voodoodyne.jackson.jsog.JSOGGenerator;
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import org.neo4j.ogm.annotation.GraphId;
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import org.neo4j.ogm.annotation.NodeEntity;
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import org.neo4j.ogm.annotation.Relationship;
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import java.util.Collection;
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import java.util.List;
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@JsonIdentityInfo(generator=JSOGGenerator.class)
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@NodeEntity
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public class Movie {
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@GraphId
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Long id;
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private String title;
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private int released;
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private String tagline;
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@Relationship(type="ACTED_IN", direction = Relationship.INCOMING) private List<Role> roles;
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public Movie() { }
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public String getTitle() {
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return title;
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}
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public int getReleased() {
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return released;
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}
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public String getTagline() {
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return tagline;
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}
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public Collection<Role> getRoles() {
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return roles;
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}
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public void setTitle(String title) {
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this.title = title;
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}
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public void setReleased(int released) {
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this.released = released;
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}
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public void setTagline(String tagline) {
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this.tagline = tagline;
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}
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public void setRoles(List<Role> roles) {
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this.roles = roles;
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}
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}
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package com.baeldung.spring.data.neo4j.domain;
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import com.fasterxml.jackson.annotation.JsonIdentityInfo;
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import com.voodoodyne.jackson.jsog.JSOGGenerator;
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import org.neo4j.ogm.annotation.GraphId;
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import org.neo4j.ogm.annotation.NodeEntity;
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import org.neo4j.ogm.annotation.Relationship;
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import java.util.List;
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@JsonIdentityInfo(generator=JSOGGenerator.class)
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@NodeEntity
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public class Person {
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@GraphId
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Long id;
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private String name;
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private int born;
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@Relationship(type = "ACTED_IN")
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private List<Movie> movies;
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public Person() { }
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public String getName() {
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return name;
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}
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public int getBorn() {
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return born;
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}
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public List<Movie> getMovies() {
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return movies;
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}
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public void setName(String name) {
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this.name = name;
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}
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public void setBorn(int born) {
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this.born = born;
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}
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public void setMovies(List<Movie> movies) {
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this.movies = movies;
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}
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}
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package com.baeldung.spring.data.neo4j.domain;
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import com.fasterxml.jackson.annotation.JsonIdentityInfo;
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import com.voodoodyne.jackson.jsog.JSOGGenerator;
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import org.neo4j.ogm.annotation.EndNode;
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import org.neo4j.ogm.annotation.GraphId;
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import org.neo4j.ogm.annotation.RelationshipEntity;
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import org.neo4j.ogm.annotation.StartNode;
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import java.util.Collection;
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@JsonIdentityInfo(generator=JSOGGenerator.class)
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@RelationshipEntity(type = "ACTED_IN")
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public class Role {
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@GraphId
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Long id;
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private Collection<String> roles;
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@StartNode
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private Person person;
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@EndNode
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private Movie movie;
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public Role() {
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}
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public Collection<String> getRoles() {
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return roles;
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}
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public Person getPerson() {
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return person;
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}
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public Movie getMovie() {
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return movie;
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}
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public void setRoles(Collection<String> roles) {
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this.roles = roles;
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}
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public void setPerson(Person person) {
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this.person = person;
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}
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public void setMovie(Movie movie) {
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this.movie = movie;
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}
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}
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package com.baeldung.spring.data.neo4j.repostory;
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import com.baeldung.spring.data.neo4j.domain.Movie;
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import org.springframework.data.neo4j.annotation.Query;
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import org.springframework.data.neo4j.repository.GraphRepository;
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import org.springframework.data.repository.query.Param;
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import org.springframework.stereotype.Repository;
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import java.util.Collection;
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import java.util.List;
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import java.util.Map;
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@Repository
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public interface MovieRepository extends GraphRepository<Movie> {
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Movie findByTitle(@Param("title") String title);
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@Query("MATCH (m:Movie) WHERE m.title =~ ('(?i).*'+{title}+'.*') RETURN m")
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Collection<Movie> findByTitleContaining(@Param("title") String title);
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@Query("MATCH (m:Movie)<-[:ACTED_IN]-(a:Person) RETURN m.title as movie, collect(a.name) as cast LIMIT {limit}")
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List<Map<String,Object>> graph(@Param("limit") int limit);
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}
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package com.baeldung.spring.data.neo4j.repostory;
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import com.baeldung.spring.data.neo4j.domain.Person;
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import org.springframework.data.neo4j.repository.GraphRepository;
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import org.springframework.stereotype.Repository;
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@Repository
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public interface PersonRepository extends GraphRepository<Person> {
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}
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package com.baeldung.spring.data.neo4j.services;
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import com.baeldung.spring.data.neo4j.repostory.MovieRepository;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.stereotype.Service;
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import org.springframework.transaction.annotation.Transactional;
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import java.util.*;
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@Service
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@Transactional
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public class MovieService {
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@Autowired
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MovieRepository movieRepository;
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private Map<String, Object> toD3Format(Iterator<Map<String, Object>> result) {
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List<Map<String,Object>> nodes = new ArrayList<Map<String,Object>>();
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List<Map<String,Object>> rels= new ArrayList<Map<String,Object>>();
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int i=0;
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while (result.hasNext()) {
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Map<String, Object> row = result.next();
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nodes.add(map("title",row.get("movie"),"label","movie"));
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int target=i;
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i++;
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for (Object name : (Collection) row.get("cast")) {
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Map<String, Object> actor = map("title", name,"label","actor");
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int source = nodes.indexOf(actor);
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if (source == -1) {
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nodes.add(actor);
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source = i++;
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}
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rels.add(map("source",source,"target",target));
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}
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}
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return map("nodes", nodes, "links", rels);
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}
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private Map<String, Object> map(String key1, Object value1, String key2, Object value2) {
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Map<String, Object> result = new HashMap<String,Object>(2);
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result.put(key1,value1);
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result.put(key2,value2);
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return result;
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}
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public Map<String, Object> graph(int limit) {
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Iterator<Map<String, Object>> result = movieRepository.graph(limit).iterator();
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return toD3Format(result);
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}
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}
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<configuration>
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<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
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<encoder>
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<pattern>web - %date [%thread] %-5level %logger{36} - %message%n
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</pattern>
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</encoder>
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</appender>
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<logger name="org.springframework" level="WARN" />
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<logger name="org.springframework.transaction" level="WARN" />
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<!-- in order to debug some marshalling issues, this needs to be TRACE -->
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<logger name="org.springframework.web.servlet.mvc" level="WARN" />
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<root level="INFO">
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<appender-ref ref="STDOUT" />
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</root>
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</configuration>
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package com.baeldung.spring.data.neo4j;
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import com.baeldung.spring.data.neo4j.config.MovieDatabaseNeo4jTestConfiguration;
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import com.baeldung.spring.data.neo4j.domain.Movie;
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import com.baeldung.spring.data.neo4j.domain.Person;
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import com.baeldung.spring.data.neo4j.domain.Role;
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import com.baeldung.spring.data.neo4j.repostory.MovieRepository;
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import com.baeldung.spring.data.neo4j.repostory.PersonRepository;
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import org.junit.Before;
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import org.junit.Test;
|
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import org.junit.runner.RunWith;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.test.annotation.DirtiesContext;
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import org.springframework.test.context.ActiveProfiles;
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import org.springframework.test.context.ContextConfiguration;
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import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
|
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import java.util.*;
|
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import static junit.framework.TestCase.assertNull;
|
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import static org.junit.Assert.assertEquals;
|
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import static org.junit.Assert.assertNotNull;
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@RunWith(SpringJUnit4ClassRunner.class)
|
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@ContextConfiguration(classes = MovieDatabaseNeo4jTestConfiguration.class)
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@ActiveProfiles(profiles = "test")
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public class MovieRepositoryTest {
|
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|
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@Autowired
|
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private MovieRepository movieRepository;
|
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|
||||
@Autowired
|
||||
private PersonRepository personRepository;
|
||||
|
||||
public MovieRepositoryTest() {
|
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}
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@Before
|
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public void initializeDatabase() {
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System.out.println("seeding embedded database");
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Movie italianJob = new Movie();
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||||
italianJob.setTitle("The Italian Job");
|
||||
italianJob.setReleased(1999);
|
||||
movieRepository.save(italianJob);
|
||||
|
||||
Person mark = new Person();
|
||||
mark.setName("Mark Wahlberg");
|
||||
personRepository.save(mark);
|
||||
|
||||
Role charlie = new Role();
|
||||
charlie.setMovie(italianJob);
|
||||
charlie.setPerson(mark);
|
||||
Collection<String> roleNames = new HashSet();
|
||||
roleNames.add("Charlie Croker");
|
||||
charlie.setRoles(roleNames);
|
||||
List<Role> roles = new ArrayList();
|
||||
roles.add(charlie);
|
||||
italianJob.setRoles(roles);
|
||||
movieRepository.save(italianJob);
|
||||
}
|
||||
|
||||
@Test
|
||||
@DirtiesContext
|
||||
public void testFindByTitle() {
|
||||
System.out.println("findByTitle");
|
||||
String title = "The Italian Job";
|
||||
Movie result = movieRepository.findByTitle(title);
|
||||
assertNotNull(result);
|
||||
assertEquals(1999, result.getReleased());
|
||||
}
|
||||
|
||||
@Test
|
||||
@DirtiesContext
|
||||
public void testCount() {
|
||||
System.out.println("count");
|
||||
long movieCount = movieRepository.count();
|
||||
assertNotNull(movieCount);
|
||||
assertEquals(1, movieCount);
|
||||
}
|
||||
|
||||
@Test
|
||||
@DirtiesContext
|
||||
public void testFindAll() {
|
||||
System.out.println("findAll");
|
||||
Collection<Movie> result =
|
||||
(Collection<Movie>) movieRepository.findAll();
|
||||
assertNotNull(result);
|
||||
assertEquals(1, result.size());
|
||||
}
|
||||
|
||||
@Test
|
||||
@DirtiesContext
|
||||
public void testFindByTitleContaining() {
|
||||
System.out.println("findByTitleContaining");
|
||||
String title = "Italian";
|
||||
Collection<Movie> result =
|
||||
movieRepository.findByTitleContaining(title);
|
||||
assertNotNull(result);
|
||||
assertEquals(1, result.size());
|
||||
}
|
||||
|
||||
@Test
|
||||
@DirtiesContext
|
||||
public void testGraph() {
|
||||
System.out.println("graph");
|
||||
List<Map<String, Object>> graph = movieRepository.graph(5);
|
||||
assertEquals(1, graph.size());
|
||||
Map<String, Object> map = graph.get(0);
|
||||
assertEquals(2, map.size());
|
||||
String[] cast = (String[]) map.get("cast");
|
||||
String movie = (String) map.get("movie");
|
||||
assertEquals("The Italian Job", movie);
|
||||
assertEquals("Mark Wahlberg", cast[0]);
|
||||
}
|
||||
|
||||
@Test
|
||||
@DirtiesContext
|
||||
public void testDeleteMovie() {
|
||||
System.out.println("deleteMovie");
|
||||
movieRepository.delete(movieRepository.findByTitle("The Italian Job"));
|
||||
assertNull(movieRepository.findByTitle("The Italian Job"));
|
||||
}
|
||||
|
||||
@Test
|
||||
@DirtiesContext
|
||||
public void testDeleteAll() {
|
||||
System.out.println("deleteAll");
|
||||
movieRepository.deleteAll();
|
||||
Collection<Movie> result =
|
||||
(Collection<Movie>) movieRepository.findAll();
|
||||
assertEquals(0, result.size());
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue