如何配置彈簧批量作業模塊化？

我想在我的spring-batch應用程序定義的多發Jobs，並努力使他們模塊化如下：如何配置彈簧批量作業模塊化？

@Configuration 
@EnableBatchProcessing(modular = true) 
public class ModularConfig { 
    @Bean 
    public ApplicationContextFactory getJob1() { 
     Sysout("job1"); 
     return new GenericApplicationContextFactory(Job1.class); 
    } 

    @Bean 
    public ApplicationContextFactory getJob2() { 
     Sysout("job2"); 
     return new GenericApplicationContextFactory(Job2.class); 
    } 
}

從SYSOUT我可以看到創建工作都豆。

但是：當其中一個作業啓動時，找不到該作業的@Beans。

public class Job1 { 
    @Bean 
    public Job job(Step step) { 
     return jobFactory.get("job1") 
       .start(step) 
       .build(); 
    } 


    @Bean 
    public Step step(ItemReader<String> reader, ItemProcessor<String, String> processor, ItemWriter<String> writer) { 
     return stepFactory.get("importStep") 
       .reader(reader) 
       .processor(processor) 
       .writer(writer) 
       .build(); 
    } 

    @Bean 
    @JobScope 
    public IteamReader<String> reader(@Value("#{jobParameters['filename']}") String filename) { 
     //returns a FlatFileItemReader<String> 
    } 

    //omitted also `@Bean` for processor + writer 
}

結果：在作業配置中找不到reader！爲什麼？

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No bean named 'reader' is defined 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBeanDefinition(DefaultListableBeanFactory.java:698) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getMergedLocalBeanDefinition(AbstractBeanFactory.java:1175) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getType(AbstractBeanFactory.java:596) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.GenericTypeAwareAutowireCandidateResolver.checkGenericTypeMatch(GenericTypeAwareAutowireCandidateResolver.java:95) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.GenericTypeAwareAutowireCandidateResolver.isAutowireCandidate(GenericTypeAwareAutowireCandidateResolver.java:64) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.annotation.QualifierAnnotationAutowireCandidateResolver.isAutowireCandidate(QualifierAnnotationAutowireCandidateResolver.java:142) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.isAutowireCandidate(DefaultListableBeanFactory.java:687) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.isAutowireCandidate(DefaultListableBeanFactory.java:646) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.isAutowireCandidate(DefaultListableBeanFactory.java:630) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1191) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1116) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1014) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:813) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:741) ~[spring-beans-4.2.7.RELEASE.jar:4.2.7.RELEASE] 
    ... 34 more

那麼爲什麼不能找到讀者？我的意思是：除了命名Bean方法本身reader()並且還將其注入變量名reader？

旁註：當我刪除模塊化並在class Job1上使用@Configuration時，那麼作業運行良好。所以我很確定工作和讀者的配置應該是正確的。但是我當然不能在下面運行類似的工作類，所以我想要啓用模塊化。

編輯：當我使我的工作的@Configuration註釋，我得到一個重複的作業名例外。這就是爲什麼我沒有在上面的代碼中。

Caused by: org.springframework.batch.core.configuration.DuplicateJobException: A job configuration with this name [job1] was already registered 
    at org.springframework.batch.core.configuration.support.MapJobRegistry.register(MapJobRegistry.java:51) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE] 
    at org.springframework.batch.core.configuration.support.DefaultJobLoader.doRegister(DefaultJobLoader.java:258) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE] 
    at org.springframework.batch.core.configuration.support.DefaultJobLoader.doLoad(DefaultJobLoader.java:193) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE] 
    at org.springframework.batch.core.configuration.support.DefaultJobLoader.load(DefaultJobLoader.java:151) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE] 
    at org.springframework.batch.core.configuration.support.AutomaticJobRegistrar.start(AutomaticJobRegistrar.java:173) ~[spring-batch-core-3.0.7.RELEASE.jar:3.0.7.RELEASE] 
    ... 16 more

來源

2016-07-20 membersound