设置Spring-Data-Neo4j独立应用程序会导致无法加载ApplicationContext

Question

我花了很多时间来设置它。我正在尝试设置一个JUnit来测试一个简单的NodeEntity类和一个Repository。我也在使用Gradle（不是Maven - Gradle似乎比Maven pom.xml更干净）。另外，我正在使用Java Configuration类。

的build.gradle ：

apply plugin:'java'
apply plugin:'idea'

project.ext {
    springVersion = "4.0.3.RELEASE"
    neo4jVersion = "2.0.1.RELEASE"
    springDataGraphVersion = "3.0.1.RELEASE"

    sourceCompatibility = 1.7
    version = '1.0'
}

configurations {
    runtime
    testCompile
}
repositories {
    mavenCentral()
    mavenLocal()
    maven {
        url "http://m2.neo4j.org/content/repositories/releases/"
    }
}

dependencies {
    compile 'org.slf4j:slf4j-api:1.7.5'

    compile "org.springframework:spring-context:${springVersion}"
    compile "org.neo4j:neo4j:${neo4jVersion}"
    // Provides Repository based Object <-> Graph Mapping
    compile "org.springframework.data:spring-data-neo4j:${springDataGraphVersion}"
    compile "javax.validation:validation-api:1.0.0.GA"

    testCompile 'junit:junit-dep:4.11'
    testCompile "org.springframework:spring-test:${springVersion}"
    testCompile 'org.hamcrest:hamcrest-all:1.3'
    // Access to Neo4j testing facilities: TestGraphDatabaseFactory
    testCompile "org.neo4j:neo4j-kernel:${neo4jVersion}:tests@jar"
    testRuntime 'org.slf4j:slf4j-simple:1.7.5'
}

// Generate wrapper for Gradle
task wrapper(type: Wrapper) {
    gradleVersion = '1.11'
}

测试类

  import domains.BaseClass;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.graphdb.Transaction;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import org.springframework.transaction.annotation.Transactional;
import repos.BaseClassRepository;

import static org.junit.Assert.assertEquals;

@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes={AppConfigTest.class})
public class TestBaseClass {

    @Autowired
    private BaseClassRepository baseClassRepository;

    @Autowired
    private GraphDatabaseService graphDb;

    @Transactional
    @Test
    public void shouldCreateNode () {

        BaseClass testClass = null;

        try (Transaction tx = graphDb.beginTx()) {
            testClass = new BaseClass();
            testClass.setName("Archer");
            baseClassRepository.save(testClass);
            tx.success();
        } catch (Exception e) {
            System.err.println(e.getMessage());
        }


        BaseClass testClass1 = baseClassRepository.findByName("Archer");
        assertEquals(testClass1.getName(), "Archer");

        System.out.println(testClass.getName());
    }
}

堆栈追踪：

java.lang.IllegalStateException: Failed to load ApplicationContext
    at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContext(CacheAwareContextLoaderDelegate.java:99)
    at org.springframework.test.context.DefaultTestContext.getApplicationContext(DefaultTestContext.java:101)
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:109)
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:319)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:212)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:232)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:175)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:80)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:47)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:69)
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:49)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.messaging.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
    at org.gradle.messaging.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
    at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:103)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.messaging.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:355)
    at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:66)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:744)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'baseClassRepository': Cannot resolve reference to bean 'neo4jTemplate' while setting bean property 'neo4jTemplate'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'neo4jTemplate' is defined
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:336)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:108)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1456)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1197)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:684)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:121)
    at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:60)
    at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.delegateLoading(AbstractDelegatingSmartContextLoader.java:100)
    at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext(AbstractDelegatingSmartContextLoader.java:250)
    at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContextInternal(CacheAwareContextLoaderDelegate.java:64)
    at org.springframework.test.context.CacheAwareContextLoaderDelegate.loadContext(CacheAwareContextLoaderDelegate.java:91)
    ... 44 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'neo4jTemplate' is defined
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:641)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1159)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:282)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveReference(BeanDefinitionValueResolver.java:328)
    ... 62 more

此外，由于某种原因，shouldCreateNode()函数运行两次以进行测试。不知道为什么。 =（

AppConfigTest配置

import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.test.TestGraphDatabaseFactory;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.neo4j.config.EnableNeo4jRepositories;
import org.springframework.data.neo4j.config.Neo4jConfiguration;


@Configuration
@ComponentScan(basePackages = "domains")
@EnableNeo4jRepositories(basePackages = "repos")
public class AppConfigTest extends Neo4jConfiguration {

    public AppConfigTest () {
        setBasePackage("domains");
    }

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

}

Answer 1

我终于得到了一个有效的解决方案。

对于我的AppConfigTest类。我需要将它从Neo4jConfiguration扩展到@Autowire Neo4jTemplate。我认为这只适用于真正的应用程序。

其次，在我修复后，我在github上收到类似于spring-data-neo4j#161的错误。该错误将您指向Neo4j博客的帖子：Spring-Data-Neo4j Progress Update SDN 3我在构造函数中缺少setBasePackages()函数（请参阅相关更新的代码）。

第三，似乎@NodeEntity对象也不能包含构造函数中的变量。因此在创建基类时从我的测试中删除了它。

Answer 2

编译器抱怨

No bean named 'neo4jTemplate' is defined

位于您的测试类TestBaseClass中。因此，为了注入此类的依赖项，您需要在配置类中添加Neo4jTemplate bean：

public class AppConfigTest {
    @Bean
    public GraphDatabaseService graphDatabaseService() {
            return new TestGraphDatabaseFactory().newImpermanentDatabase();
    }

    @Bean
    public Neo4jTemplate neo4jBean() {
          return new Neo4jTemplate(graphDatabaseService());
    }
}

请注意，最新Spring版本中的Neo4jTemplate类具有GraphDatabaseService类的构造函数参数依赖性。所以你可以通过构造函数参数来完成上面的bean注入。