All, I'm using a Velocity template as part of a process that looks like this:
1. Accept batch request in XML format
2. For each item in the batch:
2a. Process the item
2b. Report the results in XML format
I'm using a custom servlet to manage this flow and step 2b is being done
like this:
// several request.setAttribute() calls
try
{
request.getRequestDispatcher("/my/velocity.vm").include(req, rsp);
}
catch (Exception e)
{
// write the error as XML elements
}
Unfortunately, the VelocityViewServlet is catching exception (such as
ParseErrorException) and rendering an HTML-appropriate response to the
output stream.
That makes my XML hard to manage.
At first, I thought "oh, okay, just subclass and override
VelocityViewServlet.error and make it throw an exception. Unfortunately,
that method isn't allowed to throw any exceptions.
It looks like my options are:
1. Subclass and override error() and use the request attributes
to report errors to the caller.
2. Subclass and override doRequest() and basically re-implement it,
wrapping any exceptions in a RuntimeException (or IOException, I
guess)
Neither of these options are very palatable for me, honestly. For #2, if
doRequest threw ServletException as well as IOException, that would at
least be more appropriate.
Does anyone have any other suggestions?
Thanks,
-chris
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