如何使用 boot 2.0 和 Neo4j SDN5 在 Spring 单元测试中配置我自己的 GraphDatabaseService 和 GraphAwareRuntime

Question

我正在编写一些单元测试，并希望将

TimeTree

与 Spring 存储库一起使用，以自动将事件节点附加到时间树。类似于 this 问题，但我使用的是 boot 2.0 和 SDN5。我认为我的主要问题是我不知道如何设置配置，所以我的存储库和我的

TimeTree

使用相同的

GraphDatabaseService

。我的

@Configuration

是这样的：

@Configuration
public class SpringConfig {

    @Bean
    public SessionFactory sessionFactory() {
        // with domain entity base package(s)
        return new SessionFactory(configuration(), "org.neo4j.boot.test.domain");
    }

    @Bean
    public org.neo4j.ogm.config.Configuration configuration() {
        return new org.neo4j.ogm.config.Configuration.Builder()
            .uri("bolt://localhost")
            .build();
    }

    @Bean
    public Session getSession() {
        return sessionFactory().openSession();
    }

    @Bean
    public GraphDatabaseService graphDatabaseService() {
        return new GraphDatabaseFactory()
            .newEmbeddedDatabase(new File("/tmp/graphDb"));
    }

    @Bean
    public GraphAwareRuntime graphAwareRuntime() {
        GraphDatabaseService graphDatabaseService = graphDatabaseService();
        GraphAwareRuntime runtime = GraphAwareRuntimeFactory
            .createRuntime(graphDatabaseService);

        runtime.registerModule(new TimeTreeModule("timetree",
            TimeTreeConfiguration
                .defaultConfiguration()
                .withAutoAttach(true)
                .with(new NodeInclusionPolicy() {
                    @Override
                    public Iterable<Node> getAll(GraphDatabaseService graphDatabaseService) {
                        return null;
                    }

                    @Override
                    public boolean include(Node node) {
                        return node.hasLabel(Label.label("User"));
                    }
                })
                .withRelationshipType(RelationshipType.withName("CREATED_ON"))
                .withTimeZone(DateTimeZone.forTimeZone(TimeZone.getTimeZone("GMT+1")))
                .withTimestampProperty("createdOn")
                .withResolution(Resolution.DAY)
//                      .withCustomTimeTreeRootProperty("timeTreeName")
                .withResolution(Resolution.HOUR), graphDatabaseService));
        runtime.start();
        return runtime;
    }
}

我的测试如下所示：

User user = new User("Michal");
user.setCreatedOn(1431937636995l);
userRepository.save(user);

GraphUnit.assertSameGraph(graphDb, "CREATE (u:User {name:'Michal', createdOn:1431937636995})," +
    "(root:TimeTreeRoot)," +
    "(root)-[:FIRST]->(year:Year {value:2015})," +
    "(root)-[:CHILD]->(year)," +
    "(root)-[:LAST]->(year)," +
    "(year)-[:FIRST]->(month:Month {value:5})," +
    "(year)-[:CHILD]->(month)," +
    "(year)-[:LAST]->(month)," +
    "(month)-[:FIRST]->(day:Day {value:18})," +
    "(month)-[:CHILD]->(day)," +
    "(month)-[:LAST]->(day)," +
    "(day)<-[:CREATED_ON]-(u)"
);

GraphUnit.printGraph(graphDb);
graphDb.shutdown();

有很多错误，但我认为它们都源于此：

Bean instantiation via factory method failed; nested exception is
org.springframework.beans.BeanInstantiationException: Failed to 
instantiate [org.springframework.data.repository.support.Repositories]: 
Factory method 'repositories' threw exception; nested exception is 
org.springframework.beans.factory.UnsatisfiedDependencyException: Error 
creating bean with name 'userRepository': Unsatisfied dependency 
expressed through method 'setSession' parameter 0; nested exception is 
org.springframework.beans.factory.NoUniqueBeanDefinitionException: No 
qualifying bean of type 'org.neo4j.ogm.session.Session' available: 
expected single matching bean but found 2: getSession,
org.springframework.data.neo4j.transaction.SharedSessionCreator#0

Answer 1

是因为配置类重新定义了一些Spring boot已经自动配置的bean（这里是

Session

）。

所以弹簧注入不知道2者之间如何选择。 删除

getSession()

应该会有帮助。

第二件事是您的

SessionFactory

必须在

graphDatabaseService()

方法中使用嵌入式数据库设置。为此，请使用现有数据库配置嵌入式驱动程序。

应该适合您的摘要配置：

@Bean
public SessionFactory sessionFactory() {
    EmbeddedDriver driver = new EmbeddedDriver(graphDatabaseService());
    return new SessionFactory(driver, "org.neo4j.boot.test.domain");
}

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

@Bean
public GraphDatabaseService graphDatabaseService() {
    return new TestGraphDatabaseFactory().newImpermanentDatabaseBuilder().newGraphDatabase();
}

@Bean
public GraphAwareRuntime graphAwareRuntime() {
    ...