使用 MultiResourceItemReader Spring 批处理获取当前资源名称

问题描述

我在 Spring Batch 中使用 MultiResourceItemReader 来读取多个 XML 文件，我想获取当前资源.这是我的配置:

public class MultiFileResourcePartitioner extends MultiResourceItemReader{@覆盖public void update(final ExecutionContext pExecutionContext) 抛出 ItemStreamException {超级更新(pExecutionContext)；if (getCurrentResource() != null && getCurrentResource().getFilename() != null) {System.out.println("更新:" + getCurrentResource().getFilename());}}}

还有我的读者:

<property name="resources" value="file:${input.directory}/*.xml"/></bean>

上面的代码正确读取 XML 文件，但方法 getCurrentResources() 返回 null.通过调试，批量进入更新方法

请帮忙！

解决方案

针对这个问题有一个特定的接口叫做 ResourceAware:目的是将当前资源注入从MultiResourceItemReader读取的对象中.
查看此主题了解更多信息.>

I am using MultiResourceItemReader in Spring Batch for reading multiple XML files and I want to get current resource.Here is my configuration:

public class MultiFileResourcePartitioner extends MultiResourceItemReader<MyObject> {
    @Override
    public void update(final ExecutionContext pExecutionContext) throws ItemStreamException {
        super.update(pExecutionContext);
        if (getCurrentResource() != null && getCurrentResource().getFilename() != null) {
            System.out.println("update:" + getCurrentResource().getFilename());
        }
    }
}

And my reader:

<bean id="myMultiSourceReader"
   class="mypackage.MultiFileResourcePartitioner">
   <property name="resources" value="file:${input.directory}/*.xml" />

</bean>

The code above read XML files correctly but the method getCurrentResources() return null.By debugging, the batch enter to update method

Please help!

解决方案

There is a specific interface for this problem called ResourceAware: it's purpouse is to inject current resource into objects read from a MultiResourceItemReader.
Check this thread for further information.

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