Hello everyone!
I have a question regarding external servlets. I have a panel that I would
like to stream content into from an external servlet. The overridden
onRender method I'm using for the Panel is shown below where "/whatever" is
the servlet that is outputting some arbitrary HTML that I would like
rendered in my wicket panel. I know this isn't the "proper" way of doing
things but I have no control over the external servlet and need to
incorporate its output into my wicket panel...
My problem.... the code below dispatches to the servlet and the servlet
begins streaming out of sequence from the wicket panel. So the html from the
servlet starts streaming then the wicket page starts streaming and the
servlet html isn't within my wicket panel and then I start getting errors
(shown after the onRender method)...
Please let me know if I'm not being clear enough I'd be happy to elaborate!
protected void onRender(MarkupStream markupStream) {
ServletWebRequest servletWebRequest = (ServletWebRequest)
getRequest();
HttpServletRequest request =
servletWebRequest.getHttpServletRequest();
WebResponse webResponse = (WebResponse) getResponse();
HttpServletResponse response = webResponse.getHttpServletResponse();
RequestDispatcher dispatcher =
request.getRequestDispatcher("/whatever");
try {
dispatcher.include(request, response);
response.flushBuffer();
} catch (ServletException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IOException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
}
Error stack trace:
ERROR - WicketFilter - closing the buffer error
java.lang.IllegalStateException: getWriter can't be used after
getOutputStream was invoked
at
org.apache.jetspeed.aggregator.impl.HttpBufferedResponse.getWriter(HttpBufferedResponse.java:68)
at
javax.servlet.ServletResponseWrapper.getWriter(ServletResponseWrapper.java:112)
at
org.apache.wicket.protocol.http.WebResponse.write(WebResponse.java:355)
at
org.apache.wicket.protocol.http.BufferedWebResponse.close(BufferedWebResponse.java:73)
at
org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:391)
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:199)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:691)
at
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:594)
at
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:505)
at
org.apache.jetspeed.dispatcher.JetspeedRequestDispatcher.include(JetspeedRequestDispatcher.java:73)
at
org.apache.wicket.protocol.http.portlet.WicketPortlet.processRequest(WicketPortlet.java:519)
at
org.apache.wicket.protocol.http.portlet.WicketPortlet.doView(WicketPortlet.java:416)
at javax.portlet.GenericPortlet.doDispatch(GenericPortlet.java:247)
at javax.portlet.GenericPortlet.render(GenericPortlet.java:175)
at
org.apache.jetspeed.factory.JetspeedPortletInstance.render(JetspeedPortletInstance.java:103)
at
org.apache.jetspeed.container.JetspeedContainerServlet.doGet(JetspeedContainerServlet.java:277)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:691)
at
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:594)
at
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:505)
at
org.apache.jetspeed.container.invoker.ServletPortletInvoker.invoke(ServletPortletInvoker.java:273)
at
org.apache.jetspeed.container.invoker.ServletPortletInvoker.render(ServletPortletInvoker.java:140)
at
org.apache.pluto.PortletContainerImpl.renderPortlet(PortletContainerImpl.java:119)
at
org.apache.jetspeed.container.JetspeedPortletContainerWrapper.renderPortlet(JetspeedPortletContainerWrapper.java:121)
at
org.apache.jetspeed.aggregator.impl.RenderingJobImpl.execute(RenderingJobImpl.java:271)
at
org.apache.jetspeed.aggregator.impl.PortletRendererImpl.renderNow(PortletRendererImpl.java:228)
at
org.apache.jetspeed.aggregator.impl.PageAggregatorImpl.aggregateAndRender(PageAggregatorImpl.java:147)
at
org.apache.jetspeed.aggregator.impl.PageAggregatorImpl.aggregateAndRender(PageAggregatorImpl.java:143)
at
org.apache.jetspeed.aggregator.impl.PageAggregatorImpl.build(PageAggregatorImpl.java:78)
at
org.apache.jetspeed.aggregator.AggregatorValve.invoke(AggregatorValve.java:46)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.aggregator.HeaderAggregatorValve.invoke(HeaderAggregatorValve.java:53)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.decoration.DecorationValve.invoke(DecorationValve.java:144)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.resource.ResourceValveImpl.invoke(ResourceValveImpl.java:130)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.pipeline.valve.impl.ActionValveImpl.invoke(ActionValveImpl.java:184)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.container.ContainerValve.invoke(ContainerValve.java:109)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.container.PageHistoryValve.invoke(PageHistoryValve.java:108)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.profiler.impl.ProfilerValveImpl.invoke(ProfilerValveImpl.java:248)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
com.bluenog.portalext.pipeline.customvalve.impl.CustomValveImpl.invoke(CustomValveImpl.java:61)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.security.impl.LoginValidationValveImpl.invoke(LoginValidationValveImpl.java:159)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.security.impl.PasswordCredentialValveImpl.invoke(PasswordCredentialValveImpl.java:150)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.localization.impl.LocalizationValveImpl.invoke(LocalizationValveImpl.java:170)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.security.impl.AbstractSecurityValve$1.run(AbstractSecurityValve.java:138)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAsPrivileged(Subject.java:454)
at
org.apache.jetspeed.security.JSSubject.doAsPrivileged(JSSubject.java:179)
at
org.apache.jetspeed.security.impl.AbstractSecurityValve.invoke(AbstractSecurityValve.java:132)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.container.url.impl.PortalURLValveImpl.invoke(PortalURLValveImpl.java:67)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.capabilities.impl.CapabilityValveImpl.invoke(CapabilityValveImpl.java:126)
at
org.apache.jetspeed.pipeline.JetspeedPipeline$Invocation.invokeNext(JetspeedPipeline.java:167)
at
org.apache.jetspeed.pipeline.JetspeedPipeline.invoke(JetspeedPipeline.java:146)
at
org.apache.jetspeed.engine.JetspeedEngine.service(JetspeedEngine.java:227)
at
org.apache.jetspeed.engine.JetspeedServlet.doGet(JetspeedServlet.java:242)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.jetspeed.engine.servlet.XXSUrlAttackFilter.doFilter(XXSUrlAttackFilter.java:52)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870)
at
org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
at
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
at
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
at
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:685)
at java.lang.Thread.run(Thread.java:595)
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