如何获得Spring Data Neo4j和Spring Data JPA一起工作？

Question

我有一个应用程序使用MySQL和通过REST，Neo4j服务器版本来完成一些批处理作业。

我无法弄清楚如何让他们正确地一起工作：我可以让他们两个都工作，但不能同时工作。我发现的帖子并不特定于Neo4j的服务器版本，也许这就是问题所在，因为所有其他的东西对我来说都很好。

我的配置：

JpaConfig

@Configuration 
@EnableTransactionManagement(order=Ordered.HIGHEST_PRECEDENCE) 
@PropertySource("META-INF/database.properties") 
@ImportResource("classpath*:META-INF/repository.xml") 
public class JpaConfig { 
@Autowired 
Environment env; 

@Bean(destroyMethod = "close") 
public DataSource dataSource() { 
    DataSource dataSource = new DataSource(); 
    dataSource.setDriverClassName(env.getProperty("database.driverClassName")); 
    dataSource.setUrl(env.getProperty("database.url")); 
    dataSource.setUsername(env.getProperty("database.username")); 
    dataSource.setPassword(env.getProperty("database.password")); 
    dataSource.setTestOnBorrow(true); 
    dataSource.setTestOnReturn(true); 
    dataSource.setTestWhileIdle(true); 
    dataSource.setTimeBetweenEvictionRunsMillis(1800000); 
    dataSource.setNumTestsPerEvictionRun(3); 
    dataSource.setMinEvictableIdleTimeMillis(1800000); 
    dataSource.setValidationQuery("SELECT 1"); 
    return dataSource; 
} 

@Bean 
public LocalContainerEntityManagerFactoryBean entityManagerFactory() { 
    LocalContainerEntityManagerFactoryBean entityManagerFactory = new LocalContainerEntityManagerFactoryBean(); 
    entityManagerFactory.setDataSource(dataSource()); 
    entityManagerFactory.setPackagesToScan("it.smartblue.mcba.domain"); 
    entityManagerFactory.setJpaDialect(new HibernateJpaDialect()); 
    Map<String, String> jpaProperties = new HashMap<>(); 
    jpaProperties.put("hibernate.connection.charSet", "UTF-8"); 
    jpaProperties.put("hibernate.ejb.naming_strategy", "org.hibernate.cfg.EJB3NamingStrategy"); 
    jpaProperties.put("hibernate.bytecode.provider", "javassist"); 
    jpaProperties.put("hibernate.dialect", "org.hibernate.dialect.MySQL5InnoDBDialect"); 
    entityManagerFactory.setJpaPropertyMap(jpaProperties); 
    entityManagerFactory.setPersistenceProvider(new HibernatePersistence()); 
    return entityManagerFactory; 
} 

@Bean 
public PlatformTransactionManager transactionManager() { 
    JpaTransactionManager transactionManager = new JpaTransactionManager(); 
    transactionManager.setEntityManagerFactory(entityManagerFactory().getObject()); 
    return transactionManager; 
} 

@Bean 
public PersistenceExceptionTranslationPostProcessor exceptionTranslation() { 
    return new PersistenceExceptionTranslationPostProcessor(); 
} 
} 

Neo4j.xml

<!-- neo4j configuration --> 
<neo4j:config graphDatabaseService="graphDatabaseService" entityManagerFactory="entityManagerFactory"/> 
<bean id="graphDatabaseService" class="org.springframework.data.neo4j.rest.SpringRestGraphDatabase"> 
    <constructor-arg index="0" value="http://192.168.11.186:7474/db/data" /> 
</bean> 
<neo4j:repositories base-package="it.smartblue.mcba.neo4j.repository" /> 

利用这种配置Mysql的作品完美，但Neo4j的不任何财产保存到它创建的节点。

如果我删除属性entityManagerFactory="entityManagerFactory" Neo4j的作品，但我不能写入MySQL。

我的服务方法使用@Transactional或@Neo4jTransactional注释，但不是同时注释。

类org.springframework.data.neo4j.rest.SpringRestGraphDatabase为graphDatabaseService豆里面我发现：

@Override 
public Transaction beginTx() { 
    // return super.beginTx(); 
    return new NullTransaction(); 
} 

@Override 
public TransactionManager getTxManager() { 
    return new NullTransactionManager(); 
} 

也许这是一项正在进行的工作？或者，也许我想念的东西...

我使用的是Spring 3.1.2，Hibernate 4.1.4。这是我的pom.xml的一部分。

<dependency> 
    <groupId>org.springframework.data</groupId> 
    <artifactId>spring-data-jpa</artifactId> 
    <version>1.2.0.RC1</version> 
</dependency> 
    <!-- Neo4j dependencies --> 
    <dependency> 
     <groupId>org.springframework.data</groupId> 
     <artifactId>spring-data-neo4j</artifactId> 
     <version>2.1.0.RC4</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.data</groupId> 
     <artifactId>spring-data-neo4j-rest</artifactId> 
     <version>2.1.0.RC4</version> 
    </dependency> 
    <dependency> 
     <groupId>org.springframework.data</groupId> 
     <artifactId>spring-data-neo4j-cross-store</artifactId> 
     <version>2.1.0.RC4</version> 
    </dependency> 

Answer 1

最后我做到了。

而不是有两个不同的transactionManagers，现在我只有一个ChainedTransactionManager。

我删除从JpaConfig的transactionManager的bean和neo4j.xml文件，并添加以下Neo4jConfig

import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.context.annotation.Bean; 
import org.springframework.context.annotation.Configuration; 
import org.springframework.data.neo4j.config.EnableNeo4jRepositories; 
import org.springframework.data.neo4j.config.JtaTransactionManagerFactoryBean; 
import org.springframework.data.neo4j.config.Neo4jConfiguration; 
import org.springframework.data.neo4j.rest.SpringRestGraphDatabase; 
import org.springframework.data.neo4j.transaction.ChainedTransactionManager; 
import org.springframework.orm.jpa.JpaTransactionManager; 
import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean; 
import org.springframework.transaction.PlatformTransactionManager; 

@EnableNeo4jRepositories(basePackages = { "it.smartblue.mcba.neo4j.repository" }) 
@Configuration 
public class Neo4jConfig extends Neo4jConfiguration { 

    @Autowired 
    LocalContainerEntityManagerFactoryBean entityManagerFactory; 

    @Bean 
    public SpringRestGraphDatabase graphDatabaseService() { 
     return new SpringRestGraphDatabase("http://192.168.11.186:7474/db/data"); 
    } 

    @Override 
    @Bean(name = "transactionManager") 
    public PlatformTransactionManager neo4jTransactionManager() throws Exception { 
     return new ChainedTransactionManager(new JpaTransactionManager(entityManagerFactory.getObject()), 
       new JtaTransactionManagerFactoryBean(graphDatabaseService()).getObject()); 
    } 
} 

现在我必须对我的方法只有@Transactional注释使用