| Getting NullPointerException when forwarding to a JSP in a snap bundle [message #652048] |
Wed, 02 February 2011 09:10  |
Eclipse User |
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Hi all,
I am using Snaps (self-built ca. 2010-11-01) on Virgo 2.1.0.RELEASE and everything works happily except for resolving a JSP view from a snaps-bundle. In my case I have created a JSP file in the WEB-INF/views-directory of my snap bundle. Then I created the following Spring config in this bundle:
<mvc:annotation-driven />
<!-- Resolves view names to protected .jsp resources within the /WEB-INF/views directory -->
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix" value="/WEB-INF/views/"/>
<property name="suffix" value=".jsp"/>
</bean>
The web.xml of this bundle looks like this:
<servlet>
<servlet-name>callback-controller</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/context/controller-servlet.xml
</param-value>
</init-param>
<init-param>
<param-name>contextClass</param-name>
<param-value>org.eclipse.virgo.web.dm.ServerOsgiBundleXmlWebApplicationContext</param-value>
</init-param>
<init-param>
<param-name>detectAllHandlerExceptionResolvers</param-name>
<param-value>false</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>callback-controller</servlet-name>
<url-pattern>/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>jsp</servlet-name>
<url-pattern>/WEB-INF/views/*</url-pattern>
</servlet-mapping>
My host bundle's web.xml looks like this:
<filter>
<filter-name>host-filter</filter-name>
<filter-class>org.eclipse.virgo.snaps.core.SnapHostFilter</filter-class>
</filter>
<context-param>
<param-name>contextClass</param-name>
<param-value>org.eclipse.virgo.web.dm.ServerOsgiBundleXmlWebApplicationContext</param-value>
</context-param>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/context/global-context.xml</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<filter-mapping>
<filter-name>host-filter</filter-name>
<url-pattern>/*</url-pattern>
<dispatcher>REQUEST</dispatcher>
<dispatcher>FORWARD</dispatcher>
<dispatcher>INCLUDE</dispatcher>
</filter-mapping>
I can happily interact with all my controllers in the snaps bundle, but when one of them returns a ModelAndView which should be resolved to a JSP inside the snaps bundle, I get the following exception:
java.lang.NullPointerException
org.eclipse.virgo.snaps.core.internal.webapp.container.ServletManager.findMatch(ServletManager.java:95)
org.eclipse.virgo.snaps.core.internal.webapp.container.StandardVirtualContainerRequestDispatcher.service(StandardVirtualContainerRequestDispatcher.java:89)
org.eclipse.virgo.snaps.core.internal.webapp.WebAppSnap.handleRequest(WebAppSnap.java:153)
org.eclipse.virgo.snaps.core.RequestRouter.service(RequestRouter.java:51)
org.eclipse.virgo.snaps.core.SnapHostFilter.doFilter(SnapHostFilter.java:62)
org.eclipse.virgo.snaps.core.RequestRouter.forward(RequestRouter.java:60)
org.eclipse.virgo.snaps.core.internal.webapp.container.SnapHttpServletRequest$1.forward(SnapHttpServletRequest.java:92)
org.springframework.web.servlet.view.InternalResourceView.renderMergedOutputModel(InternalResourceView.java:239)
org.springframework.web.servlet.view.AbstractView.render(AbstractView.java:250)
org.springframework.web.servlet.DispatcherServlet.render(DispatcherServlet.java:1060)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:798)
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:716)
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:647)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:552)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.eclipse.virgo.snaps.core.internal.webapp.container.ImmutableFilterChain.doFilter(ImmutableFilterChain.java:47)
org.eclipse.virgo.snaps.core.internal.webapp.container.StandardVirtualContainerRequestDispatcher$1.doWithClassLoader(StandardVirtualContainerRequestDispatcher.java:104)
org.eclipse.virgo.snaps.core.internal.webapp.container.StandardVirtualContainerRequestDispatcher$1.doWithClassLoader(StandardVirtualContainerRequestDispatcher.java:1)
org.eclipse.virgo.snaps.core.internal.webapp.container.StandardVirtualContainerRequestDispatcher.doWithThreadContextClassLoader(StandardVirtualContainerRequestDispatcher.java:121)
org.eclipse.virgo.snaps.core.internal.webapp.container.StandardVirtualContainerRequestDispatcher.service(StandardVirtualContainerRequestDispatcher.java:101)
org.eclipse.virgo.snaps.core.internal.webapp.WebAppSnap.handleRequest(WebAppSnap.java:153)
org.eclipse.virgo.snaps.core.RequestRouter.service(RequestRouter.java:51)
org.eclipse.virgo.snaps.core.SnapHostFilter.doFilter(SnapHostFilter.java:62)
Is this a bug in the snaps implementation or did I do something wrong with my configuration? I tried building from trunk today but it won't work on my Virgo - I guess it requires 2.2.0M01 which I don't use atm.
Thanks and regards
Sven
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