在jobExeuctionDecider之后执行Spring Batch（java-config）步骤 [英] Spring Batch (java-config) executing step after a jobExeuctionDecider

问题描述

我正在尝试使用java-config配置Spring批量流，
此流程基本上必须这样做：

I'm trying to configure a Flow in spring batch using java-config, this flow basically has to do this:

1. 执行init步骤（在数据库中添加记录），

1. Execute a init step(which adds a record in the database),

然后执行决策程序以检查文件是否存在，

then execute a decider to check file existence,

2.1。如果文件存在，它将执行加载作业（这是一个并行的一堆步骤的另一个流程）

2.1. IF the files exists it will execute the load job (which is another flow with a bunch of steps in parallel)

1. 执行完成步骤（在数据库中添加记录），这应该始终运行，即使2.1未执行。

I尝试进行此配置，但完成步骤永远不会运行：

I tried to do this configuration, but the finish step never runs:

        Flow flow = new FlowBuilder<SimpleFlow>("commonFlow")
            .start(stepBuilderFactory.get("initStep").tasklet(initTasklet).build())
            .next(decider)
                .on(FlowExecutionStatus.COMPLETED.getName())
                    .to(splitFlow)
                .from(decider).on("*")
                    .end()
    .next(stepBuilderFactory.get("finishStep").tasklet(finishTasklet).build())
            .end();

我能够按照以下方式工作，但它根本不优雅：

I'm able to make it work doing as below, but it is not elegant at all:

    Step finishStep = stepBuilderFactory.get("finishStep").tasklet(finishTasklet).build();

    Flow flow = new FlowBuilder<SimpleFlow>("commonFlow")
            .start(stepBuilderFactory.get("initStep").tasklet(initTasklet).build())
            .next(decider)
                .on(FlowExecutionStatus.COMPLETED.getName())
                    .to(splitFlow)
                    .next(finishStep)
                .from(decider).on("*")
                    .to(finishStep)
            .end();

有人知道在使用java-config做出决定后执行步骤的正确方法是什么？ / p>

Does anybody know how is the right way to execute a step after a decision using java-config?

推荐答案

听起来这比实际需要的要复杂得多。您无需配置流程或决策程序。这是一个非常简单的进出工作。

It sounds like this is being made MUCH more complicated than it needs to be. You do not need to configure a flow or decider. This is a VERY simple in and out job.

最简单的选择是使用Spring Integration来检测文件的呈现并触发作业。

The simplest option is to use Spring Integration to detect the presents of a file and trigger the job.

下一个最简单的选项就是对文件进行石英或CRON作业检查并启动批处理作业。

The next simplest option is just to have a quartz or CRON job check for the file and start the batch job.

最后但并非最不重要的是，你可以让作业运行，如果ItemReader找不到文件，只需吞下例外。或者设置一个FileItemReader Listener来检查方法之前的文件。

Last but not least you can have the job run and if the ItemReader can not find the file(s) just swallow the exception. Or set a FileItemReader Listener to check for files on it's before method.

这篇关于在jobExeuctionDecider之后执行Spring Batch（java-config）步骤的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！