CODEWITHSUNDEEP
springspring-batch
hammerva
hammerva

Reputation: 139

Issue with incompatible type error on ItemWriter part of batch step

I am trying to add a new step to my Spring Batch job that will create an XLS file. I have a reader that puts the output to a bean called CLUCReportDTO. I am working on the blueprint of the itemWriter to create the CSV file. Here is the code

Inside the A8SPACH2 class

  @Autowired
   private ACH2WriteProcessor clucWriter;


  public Step jobStep020() {
    return stepBuilderFactory.get(JOB.ACH2_BATCH_LOAD.getProfileName() + 
   ".js020")
            .listener(promotionListener)
            .<CLUCReportDTO, String> chunk(100)
            .reader(lockboxWirePostService.getUnappliedJes())
            .writer(clucWriter)
            .listener(listener)
            .build();
  }

Inside the ACH2WriteProcessor class

public class ACH2WriteProcessor implements ItemWriter<CLUCReportDTO>{


@Override
    public void write(List<? extends CLUCReportDTO> items) throws Exception 
    {  


    }  

 }

I am getting the following error in A8SPACH2: Cannot be converted to ItemWriter< ? Super String> . What am I missing in the setup of either A8SPACH2 or ACH2WriteProcessor that is causing this error.

Thanks

Upvotes: 0

Views: 2792

Answers (1)

Mahmoud Ben Hassine
Mahmoud Ben Hassine

Reputation: 31745

According to your configuration (.<CLUCReportDTO, String> chunk(100)), the item writer is expected to write items of type String, but you are declaring it to write items of type CLUCReportDTO (public class ACH2WriteProcessor implements ItemWriter<CLUCReportDTO>).

Your item writer should be declared like this:

public class ACH2WriteProcessor implements ItemWriter<String>{

   @Override
   public void write(List<? extends String> items) throws Exception {  

   }  
}

Upvotes: 1

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