Unresolveable Circular reference error when configuring multiple datasources in a spring batch

Question

I'm trying to configure two datasources in my spring batch application. One for batch metadata tables, and another for the business tables.

Snippet from my application.properties file:

spring.datasource.url=
spring.datasource.username=
spring.datasource.password=
spring.datasource.driver-class-name=

spring.batchdatasource.url=
spring.batchdatasource.username=
spring.batchdatasource.password=
spring.batchdatasource.driver-class-name=

My batch config file:

@Configuration
public class SpringBatchConfig extends DefaultBatchConfigurer{

    @Autowired
    private JobBuilderFactory jobs;

    @Autowired
    private StepBuilderFactory steps;

//  @Autowired
//  private DataSource dataSource;

    @Autowired
    private PlatformTransactionManager transactionManager;


    @Bean(name = "batchDatasource")
    @ConfigurationProperties(prefix="spring.batchdatasource")
    public DataSource batchDataSource(){
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "primaryDatasource")
    @ConfigurationProperties(prefix="spring.datasource")
    @Primary
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }


    @Override
    public JobRepository createJobRepository() throws Exception {
    JobRepositoryFactoryBean factory = new JobRepositoryFactoryBean();
    factory.setDataSource(batchDataSource());
//  factory.setDataSource(dataSource);
    factory.setTransactionManager(transactionManager);
    factory.setTablePrefix("schema1"+ ".BATCH_");
    factory.afterPropertiesSet();
    return factory.getObject();
    }

   /* Job and step bean definitions here */

My main class is the one annotated with @EnableBatchProcessing

@SpringBootApplication
@EnableBatchProcessing
public class SpringBatchExample1Application {

    public static void main(String[] args) {
         SpringApplication.run(SampleApplication.class, args);
    }
}

I'm getting this Requested bean is currently in creation: Is there an unresolvable circular reference? when trying to configure two datasources. It works fine when using a single datasource by autowiring(refer the commented out lines of code) instead of creating multiple beans. Following is the exception snippet:

Error creating bean with name 'springBatchConfig': Unsatisfied dependency expressed through method 'setDataSource' parameter 0; nested exception is org.springframework.beans.factory.BeanCurrentlyInCreationException: Error creating bean with name 'batchDatasource': Requested bean is currently in creation: Is there an unresolvable circular reference?

I looked up and found out this occurs when there's a dependency on a bean which is still not created or is being created. I just see it in the createJobRepository method where datasource is being plugged. I still face the error even if I don't have the createJobRepository method.

It seems like the requirement is for the datasource beans to be created before others. I tried using the @Order annotation, but no luck.

EDIT:

I tried the solution from @Mykhailo Skliar's Accepted answer below, and serparated the Datasource beans into a new Configuration class. Though it resolved the initial Unresolveble circular reference issue anymore, it led me to the following error:

Error creating bean with name 'springBatchConfig': Invocation of init method failed; nested exception is org.springframework.batch.core.configuration.BatchConfigurationException: java.lang.IllegalArgumentException: jdbcUrl is required with driverClassName.

Based on this answer, I changed my url property names as follows:

spring.datasource.jdbc-url=

spring.datasource.jdbc-url=

Though it solved the jdbcUrl error, it posed another issue:

Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Reference to database and/or server name in 'sample-sql-server.schema1.MY_TABLE_NAME' is not supported in this version of SQL Server.

Both my data sources are Azure SQL server instances. I looked up and found it was not possible to use multiple Azure SQL databases years ago, but based on this answer it should not be the case anymore.

user_12637839 · Answer

The issue is most probably because of

factory.setDataSource(batchDataSource());

You should use autowired bean here, instead of calling batchDataSource()

I would split SpringBatchConfig in two beans:

@Configuration
public class DataSourceConfig {



    @Bean(name = "batchDatasource")
    @ConfigurationProperties(prefix="spring.batchdatasource")
    public DataSource batchDataSource(){
        return DataSourceBuilder.create().build();
    }

    @Bean(name = "primaryDatasource")
    @ConfigurationProperties(prefix="spring.datasource")
    @Primary
    public DataSource primaryDataSource() {
        return DataSourceBuilder.create().build();
    }
}






@Configuration
public class SpringBatchConfig extends DefaultBatchConfigurer{

    @Autowired
    private JobBuilderFactory jobs;

    @Autowired
    private StepBuilderFactory steps;


    @Qualifier("batchDataSource")
    @Autowired
    private DataSource batchDataSource;

    @Autowired
    private PlatformTransactionManager transactionManager;



    @Override
    public JobRepository createJobRepository() throws Exception {
    JobRepositoryFactoryBean factory = new JobRepositoryFactoryBean();
    factory.setDataSource(batchDataSource);
    factory.setTransactionManager(transactionManager);
    factory.setTablePrefix("schema1"+ ".BATCH_");
    factory.afterPropertiesSet();
    return factory.getObject();
    }
}

Unresolveable Circular reference error when configuring multiple datasources in a spring batch

1 Answers