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Where to include a web components css file when integrating a third party w by Martin Vyšný, 1 week ago
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Vaadin Forum3. Vaadin 6, 7, 8

Can't run Vaadin sample project bootiful neo4-j

Bob Bobson
6 years ago Feb 22, 2016 10:54pm

I am trying to run the Neo4J sample project here: https://github.com/mstahv/bootiful-neo4j-with-vaadin

I can start it succcessfully via mvn spring-boot:run, but when I go to localhost:8080 I get this nice error message:

Failed to load the widgetset: ./VAADIN/widgetsets/org.vaadin.neo4j.vaadin.AppWidgetSet/org.vaadin.neo4j.vaadin.AppWidgetSet.nocache.js?1456179997254

I googled around and it looks like that I need to "compile the widget."  Yeah, ok.

I have the Vaadin plugin installed in Eclipse.  When I right click on the AppWidgetSet.gwt.xml file and click on the gear icon 
to compile it with the plugin, I get a nice NullPointerException:

java.lang.NullPointerException
    at com.vaadin.integration.eclipse.builder.WidgetsetBuildManager.compileWidgetset(WidgetsetBuildManager.java:637)
    at com.vaadin.integration.eclipse.handlers.CompileWidgetsetHandler.compileFile(CompileWidgetsetHandler.java:152)
    at com.vaadin.integration.eclipse.handlers.CompileWidgetsetHandler$1.run(CompileWidgetsetHandler.java:64)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

The pom.xml has an update-widgetset goal, but a comment says that is non-functional.