Gerry Kaplan wrote:
Is there a document or an example somewhere that shows how to handle an
expired continuation. If the continuation expires and the user tries to
continue their work, they get an ugly error page. How can I capture that
error? Is it in the flow or in a sitemap?
It's in the sitemap. You can use the exception selector within your
handle-errors section to catch invalid continuations. The main sitemap
that ships with the Cocoon distro contains an example of this; here's a
snippet from that sitemap:
<!--+
| At the very end of a pipeline, you can catch the errors triggered
| by the pipeline execution. The error handler is an internal sitemap
| component that, when triggered by an error, takes over the normal
| pipeline execution.
| You can here use the "notifying" generator that produces an XML
| representation and further manipulate this document for presentation
| on screen.
| You can also use any other generator if you don't want the
| error to be displayed on screen. The "exception" selector can help
| you to define different screens for different error types.
+-->
<map:handle-errors>
<map:select type="exception">
<map:when test="not-found">
<map:generate type="exception"/>
<map:transform src="stylesheets/system/exception2html.xslt">
<map:parameter name="contextPath" value="{request:contextPath}"/>
<map:parameter name="realPath" value="{realpath:}"/>
<map:parameter name="pageTitle" value="Resource not found"/>
</map:transform>
<map:serialize status-code="404"/>
</map:when>
<map:when test="invalid-continuation">
<map:generate type="exception"/>
<map:transform src="stylesheets/system/exception2html.xslt">
<map:parameter name="contextPath" value="{request:contextPath}"/>
<map:parameter name="realPath" value="{realpath:}"/>
<map:parameter name="pageTitle" value="Invalid Continuation"/>
</map:transform>
<map:serialize status-code="404"/>
</map:when>
<map:otherwise>
<map:generate type="exception"/>
<map:transform src="stylesheets/system/exception2html.xslt">
<map:parameter name="contextPath" value="{request:contextPath}"/>
<map:parameter name="realPath" value="{realpath:}"/>
</map:transform>
<map:serialize status-code="500"/>
</map:otherwise>
</map:select>
</map:handle-errors>
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