Question

我想在我的Jobs应用程序中定义多个spring-batch，并尝试将它们模块化如下：

@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);
    }
}

从sysout我可以看到两个作业bean都已创建。

但是：当其中一个作业启动时，找不到该作业的@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
}

结果：在作业配置中找不到reader！为什么呢？

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

那么为什么读者找不到？我的意思是：除了命名bean方法本身reader()以及用变量名reader注入它之外我还能做些什么？

旁注：当我删除modularty并在@Configuration上使用class Job1时，作业运行正常。所以我很确定作业和读者的配置应该是正确的。但当然我不能在下面运行类似的工作类，所以我想启用模块化。

编辑：当我在作业上启用@Configuration注释时，我遇到了重复的作业名称异常。这就是我在上面的代码中没有它的原因。

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

Answer 1

PackageManager p = getPackageManager(); ComponentName componentName = new ComponentName("myPackageName", "MyLauncherClass"); p.setComponentEnabledSetting(componentName,PackageManager.COMPONENT_ENABLED_STATE_DISABLED, PackageManager.DONT_KILL_APP);上没有thread.sleep() bean将无法注册。请查看此测试用例Test Configuration

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1 个答案: