java - Use of multiple DataSources in Spring Batch

Question

I am trying to configure a couple of datasources within Spring Batch. On startup, Spring Batch is throwing the following exception:

To use the default BatchConfigurer the context must contain no more thanone DataSource, found 2

Snippet from Batch Configuration

@Configuration
@EnableBatchProcessing 
public class BatchJobConfiguration {

    @Primary
    @Bean(name = "baseDatasource")
    public DataSource dataSource() {
         // first datasource definition here
    }
    @Bean(name = "secondaryDataSource")
    public DataSource dataSource2() {
         // second datasource definition here
    }
    ...
}

Not sure why I am seeing this exception, because I have seen some xml based configuration for Spring batch that declare multiple datasources. I am using Spring Batch core version 3.0.1.RELEASE with Spring Boot version 1.1.5.RELEASE. Any help would be greatly appreciated.

Answer 1

You must provide your own BatchConfigurer. Spring does not want to make that decision for you

@Configuration
@EnableBatchProcessing
public class BatchConfig {

     @Bean
      BatchConfigurer configurer(@Qualifier("batchDataSource") DataSource dataSource){
        return new DefaultBatchConfigurer(dataSource);
      }

...