Spring Batch - @ BeforeStep未在分区程序中调用

我们正在尝试使用spring batch partitioning来实现批处理作业 . 在“步骤2”这是一个分区步骤，我需要步骤1中的一些数据进行处理 . 我使用了StepExecutionContext，它将在步骤1被提升为作业执行上下文来存储这个数据 .

我尝试在分区器类中使用@BeforeStep注释来获取stepExecutionContext，我可以从中提取先前存储的数据并将其放入分区器的ExecutionContext中 . 但是，在分区器中不会调用带@BeforeStep注释的方法 .

有没有其他方法来实现这一目标 .

分区程序实现

public class NtfnPartitioner implements Partitioner {

    private int index = 0;
    String prev_job_time  = null;
    String curr_job_time  = null;

    private StepExecution stepExecution ;
    ExecutionContext executionContext ;

    @Override
    public Map<String, ExecutionContext> partition(int gridSize)
    {

           System.out.println("Entered Partitioner");
           List<Integer> referencIds = new ArrayList<Integer>();
           for (int i = 0; i < gridSize;i++) {
            referencIds.add(index++);
           }
           Map<String, ExecutionContext> results = new LinkedHashMap<String,ExecutionContext>();
          for (int referencId : referencIds) {
            ExecutionContext context = new ExecutionContext();
            context.put("referenceId", referencId);
            context.put(NtfnConstants.PREVIOUS_JOB_TIME, prev_job_time);
            context.put(NtfnConstants.JOB_START_TIME, curr_job_time);
            results.put("partition." + referencId, context);
          }
            return results;
        }

    @BeforeStep
    public void beforeStep(StepExecution stepExecution) {
        // TODO Auto-generated method stub
          System.out.println("Entered Before step in partion");
          JobExecution jobExecution = stepExecution.getJobExecution();
          ExecutionContext jobContext = jobExecution.getExecutionContext();
          System.out.println("ExecutionContext"+jobContext);
          String prev_job_time  = (String) jobContext.get(NtfnConstants.PREVIOUS_JOB_TIME);
          String curr_job_time  = (String) jobContext.get(NtfnConstants.JOB_START_TIME);


    }