javaspringspring-batchspring-batch-job-monitoring

Unable to get all Records based on different pageSize and ChunkSize while using JpaPagingItemReader

I need to scoped 14 records. chunkSize is 10 page Size is 2. It is scoping only 10 records.

I checked with different ways. chunkSize = 5 pageSize = 10 Still scoped only 10 records not all 14.

it works fine only if chunksize =11 and pageSize =10 or chunkSize = 10 and pageSize = 20

 build.gradle

  partition:
    defaultPartitionSize: 5
    partitionScopeChunkSize: 10
  jobs:
    jpaPagingSize: 2
  ===================ReaderClass============================ 
  public class PagingItemReader extends 
  JpaPagingItemReader<ScopeParams> {

     public PagingItemReader (
                              EntityManager entityManager,
                              EntityManagerFactory entityManagerFactory,
                              @Value("${spring.jobs.jpaPagingSize}") int jpaPagingSize)
        Map<String, Object> parameterValues = new HashMap<>();
        this.setQueryProvider(
                 ScopeParamsQueryProvider.buildForContinuousMatchScoping(
                      entityManager, 
                      IndustryCodes.valueFromCode(industryCd)));
        this.setEntityManagerFactory(entityManagerFactory);
        this.setPageSize(jpaPagingSize);
        this.setSaveState(true);
        this.setParameterValues(parameterValues);

  }
}

 ==============WriterClass==========
 public class JpaItemWriter<T> extends JpaItemWriter<T> {
   private JpaRepository<T, ? extends Serializable> repository;

   public JpaItemWriter(JpaRepository<T, ?> repository) {
    this.repository = repository;
    }

  @Override
  @Transactional
  public void write(List<? extends T> items) {
    persistEntities(items);
  }

  private void persistEntities(List<? extends T> list) {
    list.stream()
            .peek(item -> log.info("Writing={}", item))
            .forEach(repository::save);
  }

}

 ===================Step Configuration========
public Step WorkStep(StepBuilderFactory stepBuilderFactory,
              PagingItemReader ItemReader,
              ItemProcessor ItemProcessor,
              JpaItemWriter<Scope> itemWriter) {
    return stepBuilderFactory.get(WORK_MATCH)
            .<Scope, ExecutionScope>chunk(10)
            .reader(ItemReader)
            .processor(ItemProcessor)
            .writer(itemWriter)
            .build();
}

Processor Code, 

public class MatchItemProcessor implements ItemProcessor<Scope,ExecutionScope> { 

public ExecutionScope process(Scope financialTransaction) throws Exception { 
return batchExecutionScope; 
} 
} 

private ExecutionScope prepareData(Scope transaction) { ExecutionScope executionScope = new ExecutionScope(); executionScope .setIndustryTypeCode(financialTransaction.getIndustryTypeCode()); return executionScope ; }

I am updating other object in processor with same fields on which reading happens. So i am reading "Scope" entity in reader class . In processor class creating execitionScope object and updating values based on scope and persisting execitionScope in DB.

Both entities are pointing to different tables. ScopeParam hit fin_t table and ExecutionScope hit exec_scope table.

please provide me suggestion.

Solution

  • Issue has been resolved. I got help with this link. Spring batch jpaPagingItemReader why some rows are not read?