Want to configure Job with out DataSource - spring-boot

Question

I am able to run my Springbatch application when Datasource was configured in my SpringbatchConfiguration class. But i dont want Datasource to be configured. SO i used ResourcelessTransactionManager. See below my configuration class. Some one guide me how i can launch Jobs without configuring Datasource as part of Batchjob configurations.
#Configuration
#EnableBatchProcessing
#EnableAutoConfiguration
//#EnableAutoConfiguration(exclude={DataSourceAutoConfiguration.class})
public class SprintgBatchConfiguration {
/*#Autowired
private DBConfiguration dbConfig;*/
/*#Autowired
private DataSource dataSource;
#Autowired
private DataSourceTransactionManager transactionManager;
*/
//Tomcat relaated configuration//
#Bean
public MultipartConfigElement multipartConfigElement() {
MultipartConfigFactory factory = new MultipartConfigFactory();
factory.setMaxFileSize("124MB");
factory.setMaxRequestSize("124MB");
return factory.createMultipartConfig();
}
#Bean(name="csvjob")
public Job job(JobBuilderFactory jobBuilderFactory,StepBuilderFactory stepBuilderFactory,ItemReader<List<CSVPojo>> itemReader,ItemProcessor<List<CSVPojo>,CsvWrapperPojo> itemProcessor,AmqpItemWriter<CsvWrapperPojo> itemWriter){
Step step=stepBuilderFactory.get("ETL-CSV").<List<CSVPojo>,CsvWrapperPojo>chunk(100)
.reader(itemReader)
.processor(itemProcessor)
.writer(itemWriter)
.build();
Job csvJob= jobBuilderFactory.get("ETL").incrementer(new RunIdIncrementer())
.start(step).build();
return csvJob;
}
#Bean(name="exceljob")
public Job jobExcel(JobBuilderFactory jobBuilderFactory,StepBuilderFactory stepBuilderFactory,ItemReader<List<ExcelPojo>> itemReader,ItemProcessor<List<ExcelPojo>,ExcelWrapperPojo> itemProcessor,AmqpItemWriter<ExcelWrapperPojo> itemWriter){
Step step=stepBuilderFactory.get("ETL-Excel").<List<ExcelPojo>,ExcelWrapperPojo>chunk(100)
.reader(itemReader)
.processor(itemProcessor)
.writer(itemWriter)
.build();
Job ExcelJob= jobBuilderFactory.get("ETL-Excel").incrementer(new RunIdIncrementer())
.start(step).build();
return ExcelJob;
}
/*#Override
public void setDataSource(DataSource dataSource){
System.out.println("overriden");
}*/
/*#Bean
public FlatFileItemReader<CSVPojo> fileItemReader(Resource resource){
return null;
}*/
/*#Bean(name="dataSource")
public DataSource dataSource() throws SQLException
{
//BasicDataSource dataSource = new BasicDataSource();
return dataSource;
}*/
#Bean(name="transactionManager")
public ResourcelessTransactionManager transactionManager() throws SQLException{
return new ResourcelessTransactionManager();
}
/*#Bean(name="transactionManager")
public DataSourceTransactionManager transactionManager() throws SQLException{
DataSourceTransactionManager transactionManager = new DataSourceTransactionManager(this.dataSource());
return transactionManager;
}*/
/*#Bean
public JobRepository jobRepository() throws Exception{
JobRepositoryFactoryBean factoryBean = new JobRepositoryFactoryBean();
factoryBean.setDatabaseType("ORACLE");
factoryBean.setDataSource(dataSource);
factoryBean.setTransactionManager(transactionManager);
factoryBean.setIsolationLevelForCreate("ISOLATION_READ_UNCOMMITTED");
return factoryBean.getObject();
}*/
#Bean
public JobRepository jobRepository(ResourcelessTransactionManager transactionManager) throws Exception {
MapJobRepositoryFactoryBean mapJobRepositoryFactoryBean = new MapJobRepositoryFactoryBean(transactionManager);
mapJobRepositoryFactoryBean.setTransactionManager(transactionManager);
return mapJobRepositoryFactoryBean.getObject();
}
}
But i am getting below exception when i am running Application.
ationConfigEmbeddedWebApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'fileProcessController': Unsatisfied dependency expressed through field 'jobLauncher'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration': Unsatisfied dependency expressed through field 'dataSources'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'dataSource' defined in class path resource [org/springframework/boot/autoconfigure/jdbc/DataSourceConfiguration$Tomcat.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.apache.tomcat.jdbc.pool.DataSource]: Factory method 'dataSource' threw exception; nested exception is org.springframework.boot.autoconfigure.jdbc.DataSourceProperties$DataSourceBeanCreationException: Cannot determine embedded database driver class for database type NONE. If you want an embedded database please put a supported one on the classpath. If you have database settings to be loaded from a particular profile you may need to active it (no profiles are currently active).
Thanks in advance!!!!

Answer 1

Spring Boot is intended for building production grade applications. When it is used to build a Spring Batch application, it requires a data source to persist Spring Batch meta-data (See BATCH-2704).
But you can always use either:
an embedded datasource supported by Spring Boot (H2, HSQL or Derby) by just adding it to the classpath. This data source will be picked up automatically by Spring Batch
or provide a custom BatchConfigurer and use the MapJobRepository (See here)
Hope this helps.