有没有一种方法可以将spring-batch-admin和spring-boot适当地集成在一起？

Question

根据文档，spring batch admin非常容易嵌入到现有的应用程序中。简单地复制web.xml和index.jsp，然后添加所需的依赖项就足以使其工作。

但是如果我想在一个现有的spring boot项目中使用它，它会变得更糟。根据这个例子，这个配置有点蹩脚，但是它可以工作。直到我尝试在我的configuriton bean中使用@enableBatchProcessing注释。然后我得到以下异常。

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'jobBuilders' defined in class path resource [org/springframework/batch/core/configuration/annotation/SimpleBatchConfiguration.class]: Instantiation of bean failed; nested exception is org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.batch.core.configuration.annotation.JobBuilderFactory org.springframework.batch.core.configuration.annotation.AbstractBatchConfiguration.jobBuilders() throws java.lang.Exception] threw exception; nested exception is java.lang.ClassCastException: org.springframework.batch.core.repository.support.JobRepositoryFactoryBean$$EnhancerBySpringCGLIB$$49fa0273 cannot be cast to org.springframework.batch.core.repository.JobRepository
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:597)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1095)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:990)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:504)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:302)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:298)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:706)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:762)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:109)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:691)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:952)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:941)
    at demo.Application.main(Application.java:35)
Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Factory method [public org.springframework.batch.core.configuration.annotation.JobBuilderFactory org.springframework.batch.core.configuration.annotation.AbstractBatchConfiguration.jobBuilders() throws java.lang.Exception] threw exception; nested exception is java.lang.ClassCastException: org.springframework.batch.core.repository.support.JobRepositoryFactoryBean$$EnhancerBySpringCGLIB$$49fa0273 cannot be cast to org.springframework.batch.core.repository.JobRepository
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:188)
    at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:586)
    ... 17 more
Caused by: java.lang.ClassCastException: org.springframework.batch.core.repository.support.JobRepositoryFactoryBean$$EnhancerBySpringCGLIB$$49fa0273 cannot be cast to org.springframework.batch.core.repository.JobRepository
    at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$$EnhancerBySpringCGLIB$$b5c6eb04.jobRepository(<generated>)
    at org.springframework.batch.core.configuration.annotation.AbstractBatchConfiguration.jobBuilders(AbstractBatchConfiguration.java:58)
    at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$$EnhancerBySpringCGLIB$$b5c6eb04.CGLIB$jobBuilders$8(<generated>)
    at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$$EnhancerBySpringCGLIB$$b5c6eb04$$FastClassBySpringCGLIB$$d88bd05f.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:312)
    at org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration$$EnhancerBySpringCGLIB$$b5c6eb04.jobBuilders(<generated>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:166)
    ... 18 more

我的配置很简单我有两个配置bean

@Configuration
@ImportResource({"classpath:/org/springframework/batch/admin/web/resources/servlet-config.xml", 
        "classpath:/org/springframework/batch/admin/web/resources/webapp-config.xml"})
public class BatchAdminConfiguration {
}

而且

@Configuration
@EnableBatchProcessing
public class BatchImporterConfiguration { 
}

当我删除@EnableBatchProcessing并尝试使用JobBuilderFactory创建作业并使用@StepScope注释时，我会得到其他ClassCastExceptions。

现在我使用基于xml的配置来创建作业、步骤和其他bean。它工作得很好，但实际上我更喜欢xml自由配置。有没有一种方法可以轻松地集成spring boot、spring batch和spring batch admin？

Answer 1

简单的回答是，您不希望在Spring批处理管理中使用@enableBatchProcessing。SBA在全局范围内提供了许多bean，@enableBatchProcessing也提供了这些bean。SBA 2.0（目前正在开发中）可能会填补当前与@EnableBatchProcessing提供的（特别是提供JobBuilderFactory和StepBuilderFactory)之间的空白。

要使自己运行起来，您应该能够在meta-inf/spring/batch/override/目录中配置一个jobBuilderFactory和一个stepBuilderFactory以供全局使用（我自己还没有厌倦）。从那里，您可以使用meta-inf/spring/batch/jobs目录中的XML文件，这些文件只对@configuration类执行组件扫描。但是，由于bean的重复，请不要使用@enableBatchProcessing。

需要说明的是，这不是一个Spring Boot问题，因为@enablebatchprocessing是一个Spring批处理注释，而不是一个引导注释。