使用scheduler-BeanCreationNotAllowedException进行春季引导：创建名称为'entityManagerFactory'的bean时出错：不允许创建单例bean

Question

我们有一个带有调度程序的spring boot项目，它以固定的时间间隔从数据库中读取数据。

在使用maven从STS构建项目的过程中，即使最终构建状态成功 ，在运行测试用例 的控制台中 ， 我们也会遇到错误。

org.springframework.beans.factory.BeanCreationNotAllowedException: Error creating bean with name ‘entityManagerFactory’: Singleton bean creation not allowed while the singletons of this factory are in destruction (Do not request a bean from a BeanFactory in a destroy method implementation!) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:216) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199) at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeansOfType(DefaultListableBeanFactory.java:523) at org.springframework.beans.factory.BeanFactoryUtils.beansOfTypeIncludingAncestors(BeanFactoryUtils.java:276) at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.detectPersistenceExceptionTranslators(PersistenceExceptionTranslationInterceptor.java:162) at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:145) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodIntercceptor.invoke(CrudMethodMetadataPostProcessor.java:122) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207) at com.sun.proxy.$Proxy70.findByTraIdAndTransactionNameAndExecutionTime(Unknown Source) at

申请文件

@SpringBootApplication
@PropertySource("classpath:application.properties")
@EnableScheduling
public class ProvisioningApplication {

    public static void main(String[] args) {

        SpringApplication.run(ProvisioningApplication.class, args);

    }
}

调度程序文件

BusinessService具有读取数据库的逻辑

@Component
public class SchedulerJob {

    @Autowired
    BusinessService service;

    @Scheduled(fixedRate=300000) //5mnts
    public void schdeule() {
        service.startService();

    }
}

测试文件

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = ProvisioningApplication.class)
public class ProvisioningApplicationTests {

    @Test
    public void contextLoads() {
    }

}

这里的问题是，为什么Spring Boot在构建项目时运行调度程序任务，为什么它会引发上述异常？

Answer 1

在 Spring Boot中 ，当您进行Maven构建时，默认情况下会运行测试用例。在这种情况下， 将 运行 集成测试
脚本，它将尝试连接到数据库。由于您没有任何要作为项目集成测试一部分的内容。一种可能的解决方案是将您的
ProvisioningApplicationTests 类声明为 abstract 。这将限制对
ProvisioningApplicationTests 类的实例创建。

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = ProvisioningApplication.class)
public abstract class ProvisioningApplicationTests {
    @Test
    public void contextLoads() {
    }
  }

解决此问题的另一种方法是在pom.xml中包含以下代码

<plugins>
   <plugin>
    <artifactId>maven-surefire-plugin</artifactId>
    <configuration>
     <skipTests>false</skipTests>
     <excludes>
      <exclude>**/*IT.java</exclude>
     </excludes>
    </configuration>
   </plugin>
   <plugin>
    <artifactId>maven-failsafe-plugin</artifactId>
    <executions>
     <execution>
      <id>integration-test</id>
      <goals>
       <goal>integration-test</goal>
      </goals>
      <configuration>
       <skipTests>true</skipTests>
       <includes>
        <include>**/*IT.class</include>
       </includes>
      </configuration>
     </execution>
    </executions>
   </plugin>
  </plugins>

这将排除在构建项目时要执行的集成测试类。 maven-surefire-plugin 用于运行单元测试。 maven-failsafe-plugin 用于运行集成测试。使用这种方法时，请确保所有集成类文件名都以 ‘IT’ 结尾。例如UserTestIT.java