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Asked: 2026-05-13T18:45:42+00:00

I am trying to write a simple Google App Engine website that reads an

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I am trying to write a simple Google App Engine website that reads an external RSS feed. I am using ROME with JDOM, however I am getting the impression that ROME is not compatible with Google App Engine and how you may fetch data.

ROME uses the build method of the SyndFeedInput class, but I cannot find any way to how to connect this with Google App Engine and URL Fetch.

My sample code is:

URL url = new URL(rss_url);
Reader r = new InputStreamReader(url.openStream());
SyndFeed feed = new SyndFeedInput().build(r);

But on my third row I get a 

java.lang.IllegalStateException: JDOM could not create a SAX parser

It works if I run the code in an own stand alone application, but when I trigger the code via Google App Engine locally, I get the exception.

What I am doing wrong and what alternatives can I try to read an external RSS?

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1 Answer

  1. Editorial Team

    Looks like ROME isn’t supported on GAE:

    http://old.nabble.com/ROME-and-AppEngine-td23290454.html

    http://code.google.com/p/googleappengine/issues/detail?id=1367

    It seems that the workaround is to include a copy of the Xerces JAR in your application, so that JDOM doesn’t try to load it from GAE itself.

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