java - Spring Batch : How to pass data from StepExecution to JobExecution without persisting it (that is, 不使用 ExecutionContext)？

Question

我有一个 JobExecutionListener.afterJob() 实现，它打印从所有先前步骤执行中获得的一些信息:

JobExecutionListener.beforeJob():

jobExecution.getExecutionContext().putString("key", "");

步骤1:StepExecutionListener.beforeStep():

ExecutionContext context = stepExecution.getJobExecution().getExecutionContext();
context.putString("key", context.getString("key") + "Hello");

步骤2:StepExecutionListener.beforeStep():

ExecutionContext context = stepExecution.getJobExecution().getExecutionContext();
context.putString("key", context.getString("key") + " World!");

JobExecutionListener.afterJob():

System.out.println(jobExecution.getExecutionContext().getString("key"));
// results in "Hello World!"

但是当执行这样的作业时，这些数据将被持久化(例如，在BATCH_JOB_EXECUTION_CONTEXT表中)。如何避免这种情况？

Answer 1

使用外部 bean 保存要在步骤之间传递的数据；此外部 bean 未持久保存，您需要连接到 SB 工件或监听器。