java如何获取具有已完成状态的Spring批处理作业最后一次执行的开始或结束日期？

Question

我正在编写一个Spring批处理过程（SpringBoot2.x.x）。作业根据上次更新日期从表中选择一些行-

(select * from tablename where last_upd_dt >= :lastruntime).

：lastruntime是作业最后一次（成功）完成运行的日期。我正在尝试使用JobListener/JobExecutionListener从Listener类中的beforeJob方法获取此日期

有没有办法利用Spring批处理框架提供的类？否则，我将不得不从另一个表中写入和检索此信息

Answer 1

您可以使用JobExplorerAPI。它允许您获取作业实例的作业执行情况。一旦获得该结果，就可以根据需要过滤结果，并从JobExecution对象中获取开始/结束日期

Answer 2

我能够使用JobExplorer API

private Date fetchPreviousJobCompletetionDate() {
    Date previousJobCompleteDate = null;
    try {
        Integer jobInstanceCount = jobExplorer.getJobInstanceCount("myjob");
        List<JobInstance> jobInstances = jobExplorer.getJobInstances("myjob", 0, jobInstanceCount);
        List<JobExecution> jobExecutions = jobInstances.stream().map(jobExplorer::getJobExecutions)
                .flatMap(List<JobExecution>::stream)
                .filter(param -> param.getExitStatus().equals(ExitStatus.COMPLETED)).collect(Collectors.toList());
        if (CollectionUtils.isNotEmpty(jobExecutions)) {
            Optional<JobExecution> jobExecutionOptional = jobExecutions.stream().sorted((JobExecution execution1, JobExecution execution2) -> execution2.getStartTime()
                    .compareTo(execution1.getStartTime())).findFirst();
            if (jobExecutionOptional.isPresent()) {
                previousJobCompleteDate = jobExecutionOptional.get().getStartTime();
            }
        }
    } catch (NoSuchJobException exception) {
        log.error("Exception occurred {}", exception.getMessage());
    }
    return previousJobCompleteDate;
}