Classpath issues when using Design Engine in a servlet

jsherriff

I'm trying to use the design engine in a servlet under grails and have classnotfound issues when referencing plug-in jars. This is what I'm trying:

IPlatformContext context = new PlatformServletContext(servletContext);

DesignConfig config = new DesignConfig();

config.setProperty("BIRT_HOME", servletContext.getRealPath(".") + "/WEB-INF/platform/")
config.setBIRTHome(servletContext.getRealPath(".") + "/WEB-INF/platform/")
config.setPlatformContext(context);

Platform.startup(config);
IDesignEngineFactory factory = (IDesignEngineFactory) Platform.createFactoryObject(IDesignEngineFactory.EXTENSION_DESIGN_ENGINE_FACTORY);
IDesignEngine engine = factory.createDesignEngine(config);

As soon as I reference a plugin class, I get:
Caused by: java.lang.NoClassDefFoundError: org.eclipse.birt.chart.reportitem.ChartXTabUtil
(for example).

Needless to say, the plugins dir is under WEB-INF/platform/. What might I be doing wrong?

jsherriff

After deeper investigating, this seems more sinister and less sinister at the same time. I worked around the not found exceptions by copying the reportitem jar to my lib - which doesn't seem like it should be necessary. I get further, but now I'm getting a classcastexception on org.eclipse.birt.chart.reportitem.ChartReportItemImpl at:

ChartReportItemImpl reportItem = (ChartReportItemImpl) chartHandle.getReportItem( );

Any ideas? I see another googlit with this same error, but it doesn't come to a resolution.

J