17 lines
2.3 KiB
HTML
17 lines
2.3 KiB
HTML
<?xml version="1.0" encoding="UTF-8" standalone="no"?><!DOCTYPE html><html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" xmlns:m="http://www.w3.org/1998/Math/MathML" xmlns:pls="http://www.w3.org/2005/01/pronunciation-lexicon" xmlns:ssml="http://www.w3.org/2001/10/synthesis" xmlns:svg="http://www.w3.org/2000/svg"><head><title>Multi-File Input</title><link rel="stylesheet" type="text/css" href="docbook-epub.css"/><meta name="generator" content="DocBook XSL Stylesheets V1.78.1"/><link rel="prev" href="ch06s07.xhtml" title="XML Item Readers and Writers"/><link rel="next" href="ch06s09.xhtml" title="Database"/></head><body><header/><section class="section" title="Multi-File Input" epub:type="subchapter" id="multiFileInput"><div class="titlepage"><div><div><h2 class="title" style="clear: both">Multi-File Input</h2></div></div></div><p>It is a common requirement to process multiple files within a single
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<code class="classname">Step</code>. Assuming the files all have the same
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formatting, the <code class="classname">MultiResourceItemReader</code> supports
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this type of input for both XML and flat file processing. Consider the
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following files in a directory:</p><pre class="programlisting">file-1.txt file-2.txt ignored.txt</pre><p>file-1.txt and file-2.txt are formatted the same and for business
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reasons should be processed together. The
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<code class="classname">MuliResourceItemReader</code> can be used to read in both
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files by using wildcards:</p><pre class="programlisting"><bean id="multiResourceReader" class="org.spr...MultiResourceItemReader">
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<property name="resources" value="classpath:data/input/file-*.txt" />
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<property name="delegate" ref="flatFileItemReader" />
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</bean></pre><p>The referenced delegate is a simple
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<code class="classname">FlatFileItemReader</code>. The above configuration will
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read input from both files, handling rollback and restart scenarios. It
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should be noted that, as with any <code class="classname">ItemReader</code>,
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adding extra input (in this case a file) could cause potential issues when
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restarting. It is recommended that batch jobs work with their own
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individual directories until completed successfully.</p></section><footer/></body></html> |