SDN4 Java配置和索引.auto = assert

Question

我將Neo4j配置從ogm.properties移至Java配置。

這是我目前的配置：

@Configuration 
@EnableNeo4jRepositories(basePackages = "com.example.domain.repository.neo4j") 
@EnableTransactionManagement 
public class Neo4jTestConfig { 

    @Value("${neo4j.embedded.database.path}") 
    private String storeDir; 

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

    @Bean 
    public SessionFactory sessionFactory() { 

     Components.setDriver(new EmbeddedDriver(graphDatabaseService())); 

     return new SessionFactory("com.example"); 
    } 

    @Bean(destroyMethod = "shutdown") 
    public GraphDatabaseService graphDatabaseService() { 

     // @formatter:off 
     GraphDatabaseService graphDatabaseService = new GraphDatabaseFactory() 
       .newEmbeddedDatabaseBuilder(new File(storeDir)) 
       .loadPropertiesFromFile(this.getClass().getClassLoader().getResource("neo4j.properties").getPath()) 
       .newGraphDatabase(); 
     // @formatter:on 

     return graphDatabaseService; 
    } 

} 

現在我不知道該怎麼OGM財產indexes.auto=assert適當加此配置。

修訂

我已經更新我的配置如下：

@Profile("test") 
@Configuration 
@EnableNeo4jRepositories(basePackages = "com.example.domain.repository.neo4j") 
@EnableTransactionManagement 
public class Neo4jTestConfig { 

    @Value("${neo4j.embedded.database.path}") 
    private String storeDir; 

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

    @Bean 
    public SessionFactory sessionFactory() { 

     Components.setDriver(new EmbeddedDriver(graphDatabaseService())); 

     return new SessionFactory(configuration(), "com.example.domain.model"); 
    } 

    @Bean(destroyMethod = "shutdown") 
    public GraphDatabaseService graphDatabaseService() { 

     // @formatter:off 
     GraphDatabaseService graphDatabaseService = new GraphDatabaseFactory() 
       .newEmbeddedDatabaseBuilder(new File(storeDir)) 
       .loadPropertiesFromFile(this.getClass().getClassLoader().getResource("neo4j.properties").getPath()) 
       .newGraphDatabase(); 
     // @formatter:on 

     return graphDatabaseService; 
    } 

    @Bean 
    public org.neo4j.ogm.config.Configuration configuration() { 
     org.neo4j.ogm.config.Configuration config = new org.neo4j.ogm.config.Configuration(); 
     config.autoIndexConfiguration().setAutoIndex("assert"); 
     return config; 
    } 

} 

但是現在到了下面的異常失敗：

Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.neo4j.ogm.session.SessionFactory]: Factory method 'sessionFactory' threw exception; nested exception is org.neo4j.ogm.exception.ServiceNotFoundException: Could not load driver: null. 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189) 
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588) 
    ... 80 common frames omitted 
Caused by: org.neo4j.ogm.exception.ServiceNotFoundException: Could not load driver: null. 
    at org.neo4j.ogm.service.DriverService.load(DriverService.java:57) 
    at org.neo4j.ogm.service.DriverService.load(DriverService.java:69) 
    at org.neo4j.ogm.service.Components.loadDriver(Components.java:158) 
    at org.neo4j.ogm.service.Components.driver(Components.java:104) 
    at org.neo4j.ogm.session.SessionFactory.<init>(SessionFactory.java:44) 
    at org.neo4j.ogm.session.SessionFactory.<init>(SessionFactory.java:93) 
    at com.example.domain.configuration.Neo4jTestConfig.sessionFactory(Neo4jTestConfig.java:37) 
    at com.example.domain.configuration.Neo4jTestConfig$$EnhancerBySpringCGLIB$$bde0f39a.CGLIB$sessionFactory$1(<generated>) 
    at com.example.domain.configuration.Neo4jTestConfig$$EnhancerBySpringCGLIB$$bde0f39a$$FastClassBySpringCGLIB$$b12a6805.invoke(<generated>) 
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228) 
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:358) 
    at com.example.domain.configuration.Neo4jTestConfig$$EnhancerBySpringCGLIB$$bde0f39a.sessionFactory(<generated>) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:498) 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162) 
    ... 81 common frames omitted 

修訂

這是我基於博爾特駕駛的生產配置：

@Profile("production") 
@Configuration 
@EnableNeo4jRepositories(basePackages = "com.example.domain.repository.neo4j") 
@EnableTransactionManagement 
public class Neo4jConfig { 

    @Value("${neo4j.server.database.uri}") 
    private String serverDatabaseUri; 

    @Value("${neo4j.username}") 
    private String username; 

    @Value("${neo4j.password}") 
    private String password; 

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

    @Bean 
    public SessionFactory sessionFactory() { 
     Components.setDriver(new BoltDriver()); 

     return new SessionFactory(configuration(), "com.example.domain.model"); 
    } 

    @Bean 
    public org.neo4j.ogm.config.Configuration configuration() { 
     org.neo4j.ogm.config.Configuration configuration = new org.neo4j.ogm.config.Configuration(); 

     // @formatter:off 
     configuration 
      .autoIndexConfiguration() 
       .setAutoIndex("assert"); 
     configuration 
      .driverConfiguration() 
       .setCredentials(username, password) 
       .setURI(serverDatabaseUri); 
     // @formatter:on 

     return configuration; 
    } 

} 

此配置工作正常，但我仍然有嵌入式基於Java的配置問題。

Answer 1

這似乎是OGM配置中的一個盲點，所以需要跳過一些環節。

有2個問題：

• 驅動程序類名稱必須設置，否則你將得到NPE
• ，即使你做，你通過Components.setDriver設置的驅動程序將在new SessionFactory被摧毀（OGM認爲你與自定義配置重新配置它）

對於嵌入式數據庫您sessionFactory()應該如下所示：

org.neo4j.ogm.config.Configuration configuration = new org.neo4j.ogm.config.Configuration(); 
// Register your configuration here, this will confuse OGM so the driver you set below won't be destroyed 
Components.configure(configuration); 

// Register your driver 
EmbeddedDriver driver = new EmbeddedDriver(graphDatabaseService()); 
Components.setDriver(driver); 

// Set driver class name so you won't get NPE 
configuration.driverConfiguration().setDriverClassName("org.neo4j.ogm.drivers.embedded.driver.EmbeddedDriver"); 

// Configure auto index 
configuration.autoIndexConfiguration().setAutoIndex("assert"); 

return new SessionFactory(configuration, "com.example"); 

它的工作原理，但要小心它是一個黑客。應該罰款測試雖然。