在运行时动态选择弹簧批量阅读器 [英] Dynamically choose a spring-batch reader at runtime

问题描述

我有一个弹出批处理作业，可以将各种银行对帐单转换为我的应用程序。每种银行对账单类型都有一个不同的读者，所有这些只有一个作者。这项工作非常简单 - 阅读，处理和写作：

I have a spring-batch job that converts various bank statements into my app. There is a different reader for each bank statement type and only one writer for all of them. The job is very simple - read, process and write:

<batch:job id="importer" restartable="true">
    <batch:step id="import">
        <batch:tasklet>
            <batch:chunk reader="reader" writer="writer" processor="processor" commit-interval="10" />
        </batch:tasklet>
    </batch:step>
</batch:job>

现在，我希望最终用户提供一个声明文件以及银行信息，然后选择运行时相应的弹簧批处理读取器，以运行此作业。理想情况下，如果我能够在第一步中预读并尝试首先猜测银行表单语句格式，那将是很好的。但我离题了。

Now, I would like the end user to provide a statement file as well as bank information and then choose a corresponding spring-batch reader at runtime for this job to run. Ideally it would be great if I could read-ahead in a first step and tried to "guess" the bank form statement format first. But I digress.

在运行之前是否可以将读卡器注入作业？或者有更好的方法来实现我的目标吗？

Is it possible to inject a reader into a job prior to running it? Or is there a better way to achieve my goal?

推荐答案

您可以从输入参数/或propeties文件设置阅读器：

You can set the reader from an input parameter/or a propeties file:

<batch:chunk reader="#{jobParameters['reader.beanId']}" writer="writer" processor="processor" commit-interval="10" />

您还可以考虑作业和步骤属性的后期绑定，这里是spring-batch的链接< a href =http://static.springsource.org/spring-batch/reference/html/configureStep.html#step-scope =nofollow>步长范围

Also you could consider late binding of job and step attributes, here is the link from spring-batch step-scope

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