Question

如果我有2个作业，每个作业都写入一个不同的数据源，则将弹簧批处理元数据（jobExecution，结果等）写入与其一起工作的数据源中是有意义的。然而，春季批处理似乎指导您拥有一个用于该元数据的“主要”数据源。

我定义了两个数据源，两个都未标记为主要数据，并且应用程序无法启动：

Field dataSource in org.springframework.batch.core.configuration.annotation.AbstractBatchConfiguration required a single bean, but 2 were found:
    - firstDataSource: defined by method 'firstDataSource' in class path resource [secret/DataSourceConfig.class]
    - secondDataSource: defined by method 'secondDataSource' in class path resource [secret/DataSourceConfig.class]


Action:

Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed

我试图创建两个配置，每个配置都扩展DefaultBatchConfigurer：

@Configuration
@EnableBatchProcessing
public class MyJobConfiguration extends DefaultBatchConfigurer {

    @Autowired
    public JobBuilderFactory jobBuilderFactory;

    @Bean
    public Job my_job(@Qualifier("somestep") Step step) {
        return jobBuilderFactory.get("my_job")
                .start(step)
                .build();
    }

    @Bean
    @Profile("my_job")
    public JobExecution launchMyJob(@Qualifier("my_job") Job job, JobLauncher jobLauncher) throws JobParametersInvalidException, JobExecutionAlreadyRunningException, JobRestartException, JobInstanceAlreadyCompleteException {
        Map<String, JobParameter> params = new HashMap<>();
        params.put("Time", new JobParameter(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(new Date())));
        return jobLauncher.run(job, new JobParameters(params));
    }

    @Override
    @Autowired
    public void setDataSource(@Qualifier("firstDataSource") DataSource dataSource) {
        super.setDataSource(dataSource);
    }
}

另一个完全相同，只是不同的作业和数据源。

那么当我显然想通过扩展DefaultBatchConfigurer来自己做时，为什么spring仍然尝试创建AbstractBatchConfiguration？

更多堆栈跟踪：

Caused by: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration': Unsatisfied dependency expressed through field 'dataSource'; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'javax.sql.DataSource' available: expected single matching bean but found 2: firstDataSource,secondDataSource
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:587) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:91) ~[spring-beans-5.0.5.RELEASE.jar:5.0.5.RELEASE]

Answer 1

您是说要在项目中使用多个数据源？

以下是供您参考的示例

https://github.com/michaelliao/springcloud/tree/master/data-multidatasource

Answer 2

Spring Batch的SimpleBatchConfiguration通过@EnableBatchProcessing引入。它使用BatchConfigurer提供需要添加到ApplicationContext的组件。您真正想做的是创建一个BatchConfigurer，它在正确的时间提供正确的DataSource。然后SimpleBatchConfiguration将使用配置程序创建的组件将它们添加到ApplicationContext。

春季批处理中，每个作业有不同的Jobrepository数据源吗？

2 个答案: