Question

我正尝试在作业完成之前返回Spring Batch作业ID。
我当前的实现仅在作业完成后返回信息完成。
我使用批处理程序控制器和批处理服务，如下所示。谢谢，我是Spring Batch的新手，并且经过了详尽的搜索找不到与我的问题相关的内容。有一个帖子有人在使用Apache Camel，但我不是。
我了解SimpleAsyncTaskExecutor（），但不确定如何在此处应用

控制器

@RequestMapping(value = "/batch/{progName}", method = RequestMethod.GET)
    public ResponseEntity<JobResults> process(@PathVariable("progName") String progName,
                                              @RequestHeader("Accept") MediaType accept) throws Exception {
        HttpHeaders responseHeaders = MccControllerUtils.createCacheDisabledHeaders();
        responseHeaders.setContentType(MediaType.APPLICATION_XML);
        if(!accept.toString().equals("*/*")) {
            responseHeaders.setContentType(accept);
        }
        LOGGER.info("Running batch program " + progName);
        JobResults response = batchService.processProgName(progName);
        return new ResponseEntity<JobResults>(response, responseHeaders, HttpStatus.OK);
    }

服务

@Override
    public JobResults processProgName(String progName) throws Exception {

        String jobName = "call" + progName.toUpperCase() + "Job";
        JobExecution jobExecution = null;
        String result = "";
        Long jobId = null;
        JobResults results = new JobResults();
        BatchStatus jobStatus = null;
        try {
            // Launch the appropriate batch job.
            Map<String, Job> jobs = applicationContext.getBeansOfType(Job.class);
            LOGGER.info("BATCHSTART:Starting sync batch job:" + jobName);
            JobParametersBuilder builder = new JobParametersBuilder();
            // Pass in the runtime to ensure a fresh execution.
            builder.addDate("Runtime", new Date());
            jobExecution = jobLauncher.run(jobs.get(jobName), builder.toJobParameters());
            jobId = jobExecution.getId();
            jobStatus = jobExecution.getStatus();
            results.setName(jobName);
            results.setId(jobId);
            results.setMessage("The job has finished.");
            results.setStatus(jobStatus);
            LOGGER.info("The job ID is " + jobId);
            LOGGER.info("BATCHEND:Completed sync batch job:" + jobName);
            LOGGER.info("Completion status for batch job " + jobName + " is " + jobExecution.getStatus().name());
            List<Throwable> failures = jobExecution.getAllFailureExceptions();
            if (failures.isEmpty()) {
                result = jobExecution.getExecutionContext().getString(AbstractSetupTasklet.BATCH_PROGRAM_RESULT);
            } else {
                for (Throwable fail : failures) {
                    result += fail.getMessage() + "\n";
                }
            }
            LOGGER.info("The job results are: " + result);
        } catch (JobExecutionAlreadyRunningException | JobRestartException | JobInstanceAlreadyCompleteException
                | JobParametersInvalidException e) {
            throw new RuntimeException("An error occurred while attempting to execute a job. " + e.getMessage(), e);
        }
        return results;
    }

再次感谢。

编辑

我已将此添加到我的批处理配置中

@Bean(name = "AsyncJobLauncher")
    public JobLauncher simpleJobLauncher(JobRepository jobRepository){
        SimpleJobLauncher jobLauncher = new SimpleJobLauncher();
        jobLauncher.setJobRepository(jobRepository);
        jobLauncher.setTaskExecutor(new SimpleAsyncTaskExecutor());
        return jobLauncher;
    }

编辑

我在Mahmoud Ben Hassine的评论的帮助下解决了问题：）

我必须从服务中删除结果变量和信息，并添加上面看到的代码。现在，当我到达终点时，我会立即收到工作信息。

Answer 1

您可以做的是在您的JobLauncher中注入一个BatchService实现，该实现由异步任务执行器（例如SimpleAsyncTaskExecutor或ThreadPoolTaskExecutor）支持。这将异步运行您的作业，并且将立即返回作业执行（您可以从中获取ID），而无需等待作业完成。

因此，通过在JobLauncher中注入BatchService的正确实现，无需更改processProgName方法的代码即可实现您的要求。

您可以在这里找到有关如何同步或异步运行作业的更多详细信息：https://docs.spring.io/spring-batch/4.0.x/reference/html/job.html#configuringJobLauncher

在作业完成之前返回Spring Batch作业ID

1 个答案: