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@avernet
Created Mar 13, 2012
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Using the exception catcher processor in XPL, with Orbeon Forms
<?xml version="1.0" encoding="utf-8"?>
<p:config xmlns:p="http://www.orbeon.com/oxf/pipeline"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:oxf="http://www.orbeon.com/oxf/processors">
<p:param name="instance" type="input"/>
<p:param name="data" type="output"/>
<!-- Using the URL generator, which here will 404 -->
<p:processor name="oxf:url-generator">
<p:input name="config">
<config>
<url>http://www.google.com/notfound</url>
</config>
</p:input>
<p:output name="data" id="url-data"/>
</p:processor>
<!-- The exception catcher behaves like the identity processor if there is no exception -->
<!-- However if there is an exception, it catches it, and you get a serialized form of the exception -->
<p:processor name="oxf:exception-catcher">
<p:input name="data" href="#url-data"/>
<p:output name="data" id="url-data-checked"/>
</p:processor>
<!-- Check whether we had an exception -->
<p:choose href="#url-data-checked">
<p:when test="/exceptions">
<!-- Extract the message -->
<p:processor name="oxf:xslt">
<p:input name="data" href="#url-data-checked"/>
<p:input name="config">
<message xsl:version="2.0">
<xsl:value-of select="/exceptions/exception/message"/>
</message>
</p:input>
<p:output name="data" ref="data"/>
</p:processor>
</p:when>
<p:otherwise>
<!-- Just return the document -->
<p:processor name="oxf:identity">
<p:input name="data" href="#url-data-checked"/>
<p:output name="data" ref="data"/>
</p:processor>
</p:otherwise>
</p:choose>
</p:config>
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