Question

我有一个Spring Boot应用程序（住在一个Maven项目中），我想在其中执行以下操作：根据第一个参数，将主类调度发送到不同的SpringApplication CommandLineRunners，例如：（Groovy风格）

@Configuration
@EnableAutoConfiguration

class XxxApplication {
  ...

  main (args) {
    ...      
    switch (args[0]) {
      "merge":
        SpringApplication.run ([Runner1.class, ...], remainingArgs)
        break
      "scan":
        SpringApplication.run ([Runner2.class, ...], remainingArgs)

对于所有情况，我都不需要完整的应用程序上下文，例如有些人需要一个数据库，有些人则需要在某些本地文件上完美运行。

这是有效的，只要我不需要更复杂的Beans，例如，如果我的一个Runner需要JPA Repository，

Runner2.groovy：

class Runner2 implements CommandLineRunner {

@Autowired
MetaDataRepository metaDataRepo

MetaDataRepository.groovy：

interface MetaDataRepository extends CrudRepository<MetaData, Long> {}

如果我运行案例2（“扫描”），我会得到以下异常：


Exception encountered during context initialization - cancelling refresh attempt
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'metaDataRepository': Cannot create inner bean '(inner bean)#222681bb' of type [org.springframework.orm.jpa.SharedEntityManagerCreator] while setting bean property 'entityManager'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name '(inner bean)#222681bb': Cannot resolve reference to bean 'entityManagerFactory' while setting constructor argument; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'entityManagerFactory' is defined
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveInnerBean(BeanDefinitionValueResolver.java:290) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.BeanDefinitionValueResolver.resolveValueIfNecessary(BeanDefinitionValueResolver.java:129) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1457) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1198) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:687) ~[spring-beans-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:762) ~[spring-context-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482) ~[spring-context-4.0.7.RELEASE.jar:4.0.7.RELEASE]
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691) [spring-boot-1.1.6.RELEASE.jar:1.1.6.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320) [spring-boot-1.1.6.RELEASE.jar:1.1.6.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:952) [spring-boot-1.1.6.RELEASE.jar:1.1.6.RELEASE]
    at org.springframework.boot.SpringApplication$run.call(Unknown Source) [spring-boot-1.1.6.RELEASE.jar:1.1.6.RELEASE]
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:45) [groovy-all-2.3.3.jar:2.3.3]
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:108) [groovy-all-2.3.3.jar:2.3.3]
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120) [groovy-all-2.3.3.jar:2.3.3]
...

Spring boot：主类调度到不同的SpringApplication.run类

0 个答案: