我正在使用带有OpenCSV的Spring Batch
Tasklet来读取我的CSV文件。在问这个问题之前，我知道很多块，但是在以后的步骤中文件之间会进行交叉验证，因此我必须继续使用Tasklet。

我想做的是向我的报告步骤报告丢失的文件或解析错误。我不确定应该向下一步报告失败的正确方法。我有以下代码。

读取文件的第一步。

public class CsvBatchReader<T> implements Tasklet, StepExecutionListener {

    private final Logger logger = LoggerFactory.getLogger(CsvBatchReader.class);

    private List batch;

    private final Class<T> clazz;

    private Path path;

    public CsvBatchReader(Class<T> clazz, Path path) {
        this.clazz = clazz;
        this.path = path;
    }

    @Override
    public void beforeStep(StepExecution stepExecution) {
        logger.info("Reader initialized - " + clazz.getSimpleName());

        batch = new ArrayList();
    }

    @Override
    public ExitStatus afterStep(StepExecution stepExecution) {
        logger.info("Reader ended - " + clazz.getSimpleName());
        return ExitStatus.COMPLETED;
    }

    @Override
    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws UnexpectedJobExecutionException {
        logger.info("Reader execute - " + clazz.getSimpleName());


        ICsvToBean csvToBean = new CsvToBean(clazz, path);

        try {
            batch = csvToBean.readCsv();
        } catch(IOException ex) {
            // error message being caught from my csvToBean class. 
            throw new UnexpectedJobExecutionException("Invalid file " + ex.getMessage());
        }

        return RepeatStatus.FINISHED;
    }

}

报告步骤

我不确定如何传递异常消息，或者是否有定义的方法来传递故障消息而不使用步骤执行上下文。

public class CsvBatchReporting implements Tasklet, StepExecutionListener {

    private final Logger logger = LoggerFactory.getLogger(CsvBatchCrossValidation.class);

    private List errorMessages;
    private List skippedInserts;

    @Override
    public void beforeStep(StepExecution stepExecution) {
        logger.info("Reporting initialized");

        ExecutionContext executionContext = stepExecution
                .getJobExecution()
                .getExecutionContext();

        System.out.println("description " + stepExecution.getStatus());


    }

    @Override
    public ExitStatus afterStep(StepExecution stepExecution) {
        logger.info("Reporting ended");
        return ExitStatus.COMPLETED;
    }

    @Override
    public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
        logger.info("Reporting execute");

        //Email Error

        return RepeatStatus.FINISHED;
    }

}

作业配置

@Bean
public Job primaryCareJob(@Qualifier("reportingStep") Step reportingStep, @Qualifier("crossValidationStep") Step crossValidationStep) {
    logger.info("Start PrimaryCare Job");

    return jobs.get("primaryCareJob")
            .start(readPrimaryCareStep()).on("FAILED").to(reportingStep)
            .from(readPrimaryCareStep()).on("*").to(readPrimaryCareDetailStep())

            .from(readPrimaryCareDetailStep()).on("FAILED").to(reportingStep)
            .from(readPrimaryCareDetailStep()).on("*").to(processPrimaryCareStep())

            .from(processPrimaryCareStep()).on("INVALID").to(reportingStep)
            .from(processPrimaryCareStep()).on("*").to(processPrimaryCareDetailStep())

            .from(processPrimaryCareDetailStep()).on("INVALID").to(reportingStep)
            //Other steps

            .from(reportingStep).on("*").end()
            .from(reportingStep).on("*").fail()

            .build()
        .build();
}

我开始将工作模式更改为失败，而不是将其定义为无效，以获取异常以自动调用失败的步骤。在我的afterStep中，使用以下代码定义了我使用无效的其他步骤。

if(!errorMessages.isEmpty()) {
            chunkContext.getStepContext().getStepExecution().setExitStatus(new ExitStatus("INVALID"));
}

如何从阅读器获取CSV异常消息以传递到我的报告步骤中，以便可以将其作为电子邮件发送？