I'm trying out the very nice Longwell app (v2.5.1) and in particular its integrated Welkin RDF graph visualizer. When deploying to Tomcat (v5.5.23, JDK 1.5.0_12), there seems to be a problem with constructing URLs.
This works: When I run Longwell out-of-the-box in Jetty with: cd /path/to/longwell-2.5.1 mvn package ./longwell and browse to http://myhost:8080/, I can select, e.g., type "Facade" (which yields 10 items) and then click on "Graph View" and the Welkin applet successfully renders the graph. So far so good. This doesn't work: When I build the WAR: cd /path/to/longwell-2.5.1 mvn package mvn war:war and deploy it to $CATALINA_BASE/webapps/longwell, I can browse to http://myhost:8081/longwell (served by Tomcat, not Jetty), select type "Facade" and click on "Graph View", but the applet's graph display is empty. The Java Plug-in console shows this error: Starting Welkin 1.2-dev java.io.IOException: Server returned HTTP response code: 500 for URL: http://myhost:8081/longwell//longwell/?command=export&format=RDFXML&-=%4 0lwq.project.PropertyProjector%3Bhttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F2 2-rdf-syntax-ns%23type%3B%40lwq.bucket.DistinctValueBucketer%3Brhttp%3A% 2F%2Fsimile.mit.edu%2F2005%2F04%2Fflair%23Facade& Note that the "/longwell" substring is duplicated (and yes, there are two consecutive slashes). If I browse to this URL with this duplicate substring removed, I get a properly formatted RDF XML document back. I played around with the "longwell.url" property in longwell.properties, but I couldn't find a value that worked. If I set it to http://myhost:8081/longwell, then the URL in the error message reads: http://myhost:8081/longwell/http://myhost:8081/longwell/?command=export&; format=RDFXML&-=%40lwq.project.PropertyProjector%3Bhttp%3A%2F%2Fwww.w3.o rg%2F1999%2F02%2F22-rdf-syntax-ns%23type%3B%40lwq.bucket.DistinctValueBu cketer%3Brhttp%3A%2F%2Fsimile.mit.edu%2F2005%2F04%2Fflair%23Facade& I also tried setting it to just "longwell" but then the Longwell start page already doesn't display properly. BTW, I just tried the Longwell demo at http://simile.mit.edu/longwell/demo/atom/ (select "Feed Class" - 36 items) and when I select "Graph View", no points are rendered and I get a very similar error message: Starting Welkin 1.2-dev java.io.IOException: Server returned HTTP response code: 500 for URL: http://simile.mit.edu/longwell/demo/atom/http://simile.mit.edu/longwell/ demo/atom/default?command=export&format=RDFXML&-=%40lwq.project.Property Projector%3Bhttp%3A%2F%2Fwww.w3.org%2F1999%2F02%2F22-rdf-syntax-ns%23typ e%3B%40lwq.bucket.DistinctValueBucketer%3Brhttp%3A%2F%2Fbblfish.net%2Fwo rk%2Fatom-owl%2F2006-06-06%2F%23Feed& Is there something out-of-sync between Longwell and Welkin in the way they construct URLs? How do you make Longwell/Welkin work in Tomcat (especially when it is not running as the ROOT webapp)? Please Cc me at richardcalmbach at fairisaac.com. Thanks, -Richard This email and any files transmitted with it are confidential, proprietary and intended solely for the individual or entity to whom they are addressed. If you have received this email in error please delete it immediately. _______________________________________________ General mailing list [email protected] http://simile.mit.edu/mailman/listinfo/general
