Hey, The problem is transient. @PaxWicketBeans are never serialized, but always retrieved a new. Please try to remove transient; this should do the trick.
Kind regards, Andreas On Tue, Nov 13, 2012 at 2:42 PM, Hendy Irawan <he...@soluvas.com> wrote: > Hi all, > > My code is : > > @PaxWicketBean(name="bannersSupplier") > private transient Supplier<BannerCollection> bannersSupplier; > > On first request it's OK, but on "second" request (i.e. going to another > page and going back so now it has ?0 on the URI), it seems that the field > is now null. > > bannersSupplier come from the Blueprint instance. > > This issue is always reproducible. Am I using @PaxWicketBean wrong? > > Thank you. > > java.lang.NullPointerException: bannersSupplier cannot be null > at > com.google.common.base.Preconditions.checkNotNull(Preconditions.java:208) > at id.co.bippo.web.pub.HomePage$BannerListModel.load(HomePage.java:59) > > at id.co.bippo.web.pub.HomePage$BannerListModel.load(HomePage.java:1) > at > org.apache.wicket.model.LoadableDetachableModel.getObject(LoadableDetachableModel.java:119) > at org.apache.wicket.Component.getDefaultModelObject(Component.java:1674) > > at > org.apache.wicket.markup.html.list.ListView.getViewSize(ListView.java:219) > at > org.apache.wicket.markup.html.list.ListView.onPopulate(ListView.java:473) > at > org.apache.wicket.markup.repeater.AbstractRepeater.onBeforeRender(AbstractRepeater.java:119) > > at org.apache.wicket.Component.internalBeforeRender(Component.java:994) > at org.apache.wicket.Component.beforeRender(Component.java:1028) > at > org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1743) > > at org.apache.wicket.Component.onBeforeRender(Component.java:3859) > at org.apache.wicket.Component.internalBeforeRender(Component.java:994) > at org.apache.wicket.Component.beforeRender(Component.java:1028) > > at > org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1743) > at org.apache.wicket.Component.onBeforeRender(Component.java:3859) > at org.apache.wicket.Page.onBeforeRender(Page.java:826) > > at > org.soluvas.web.site.MultitenantPage.onBeforeRender(MultitenantPage.java:56) > at org.apache.wicket.Component.internalBeforeRender(Component.java:994) > at org.apache.wicket.Component.beforeRender(Component.java:1028) > > at > org.apache.wicket.Component.internalPrepareForRender(Component.java:2229) > at org.apache.wicket.Page.internalPrepareForRender(Page.java:279) > at org.apache.wicket.Component.render(Component.java:2313) > > at org.apache.wicket.Page.renderPage(Page.java:1035) > at > org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:115) > at > org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:195) > > at > org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:167) > at > org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:784) > at > org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64) > > at > org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:255) > at > org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:212) > at > org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:283) > > at > org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188) > at > org.apache.wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:137) > at javax.servlet.http.HttpServlet.service(HttpServlet.java:693) > > at javax.servlet.http.HttpServlet.service(HttpServlet.java:806) > at > org.ops4j.pax.wicket.internal.FilterDelegator$Chain.doFilter(FilterDelegator.java:79) > at > org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain(AbstractShiroFilter.java:449) > > at > org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(AbstractShiroFilter.java:365) > at > org.apache.shiro.subject.support.SubjectCallable.doCall(SubjectCallable.java:90) > at > org.apache.shiro.subject.support.SubjectCallable.call(SubjectCallable.java:83) > > at > org.apache.shiro.subject.support.DelegatingSubject.execute(DelegatingSubject.java:383) > at > org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal(AbstractShiroFilter.java:362) > at > org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:125) > > at > org.ops4j.pax.wicket.internal.FilterDelegator$Chain.doFilter(FilterDelegator.java:77) > at > org.ops4j.pax.wicket.internal.FilterDelegator.doFilter(FilterDelegator.java:61) > at > org.ops4j.pax.wicket.internal.ServletProxy$ServletInvocationHandler.invoke(ServletProxy.java:72) > > at $Proxy16.service(Unknown Source) > at java.lang.reflect.Method.invoke(Method.java:601) > at > org.ops4j.pax.web.service.internal.HttpServiceStarted$2.invoke(HttpServiceStarted.java:210) > at org.ops4j.pax.web.service.internal.$Proxy0.service(Unknown Source) > > at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:652) > at > org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:447) > at > org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:70) > > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:137) > at > org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:559) > at > org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227) > > at > org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1038) > at > org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:117) > at > org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:374) > > at > org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189) > at > org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:972) > at > org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135) > > at > org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:74) > at > org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116) > at org.eclipse.jetty.server.Server.handle(Server.java:363) > > at > org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:483) > at > org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53) > at > org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:920) > > at > org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:982) > at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:635) > at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235) > > at > org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72) > at > org.eclipse.jetty.server.nio.BlockingChannelConnector$BlockingChannelEndPoint.run(BlockingChannelConnector.java:298) > > at > org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608) > at > org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543) > at java.lang.Thread.run(Thread.java:722) > > Complete stack: > > org.apache.wicket.WicketRuntimeException: Error attaching this container for > rendering: [BannerCarousel [Component id = afterHeader]] > at > org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1755) > > at org.apache.wicket.Component.onBeforeRender(Component.java:3859) > at org.apache.wicket.Component.internalBeforeRender(Component.java:994) > at org.apache.wicket.Component.beforeRender(Component.java:1028) > > at > org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1743) > at org.apache.wicket.Component.onBeforeRender(Component.java:3859) > at org.apache.wicket.Page.onBeforeRender(Page.java:826) > > at > org.soluvas.web.site.MultitenantPage.onBeforeRender(MultitenantPage.java:56) > at org.apache.wicket.Component.internalBeforeRender(Component.java:994) > at org.apache.wicket.Component.beforeRender(Component.java:1028) > > at > org.apache.wicket.Component.internalPrepareForRender(Component.java:2229) > at org.apache.wicket.Page.internalPrepareForRender(Page.java:279) > at org.apache.wicket.Component.render(Component.java:2313) > > at org.apache.wicket.Page.renderPage(Page.java:1035) > at > org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:115) > at > org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:195) > > at > org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:167) > at > org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:784) > at > org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64) > > at > org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:255) > at > org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:212) > at > org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:283) > > at > org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188) > > java.lang.RuntimeException: An error occurred while getting the model object > for Component: [ [Component id = banner, page = id.co.bippo.web.pub.HomePage, > path = 0:afterHeader:banner.BannerCarousel$1, isVisible = true, isVersioned = > true], children = [ListItem [Component id = 0]] [ListItem [Component id = 1]] > [ListItem [Component id = 2]]] > > at org.apache.wicket.Component.getDefaultModelObject(Component.java:1679) > at > org.apache.wicket.markup.html.list.ListView.getViewSize(ListView.java:219) > at > org.apache.wicket.markup.html.list.ListView.onPopulate(ListView.java:473) > > at > org.apache.wicket.markup.repeater.AbstractRepeater.onBeforeRender(AbstractRepeater.java:119) > at org.apache.wicket.Component.internalBeforeRender(Component.java:994) > at org.apache.wicket.Component.beforeRender(Component.java:1028) > > at > org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1743) > at org.apache.wicket.Component.onBeforeRender(Component.java:3859) > at org.apache.wicket.Component.internalBeforeRender(Component.java:994) > > at org.apache.wicket.Component.beforeRender(Component.java:1028) > at > org.apache.wicket.MarkupContainer.onBeforeRenderChildren(MarkupContainer.java:1743) > at org.apache.wicket.Component.onBeforeRender(Component.java:3859) > > at org.apache.wicket.Page.onBeforeRender(Page.java:826) > at > org.soluvas.web.site.MultitenantPage.onBeforeRender(MultitenantPage.java:56) > at org.apache.wicket.Component.internalBeforeRender(Component.java:994) > > at org.apache.wicket.Component.beforeRender(Component.java:1028) > at > org.apache.wicket.Component.internalPrepareForRender(Component.java:2229) > at org.apache.wicket.Page.internalPrepareForRender(Page.java:279) > > at org.apache.wicket.Component.render(Component.java:2313) > at org.apache.wicket.Page.renderPage(Page.java:1035) > at > org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:115) > > at > org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:195) > at > org.apache.wicket.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:167) > at > org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:784) > > at > org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64) > at > org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:255) > at > org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:212) > > at > org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:283) > at > org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:188) > > > -- > Hendy Irawan - on Twitter <http://twitter.com/hendybippo> - on > LinkedIn<http://id.linkedin.com/in/hendyirawan> > Web Developer | Bippo Indonesia <http://www.bippo.co.id/> | Akselerator > Bisnis | Bandung > > > 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