new PublisherBean().publishNews();
seems to be wrong. You don't instantiate a bean class; you need to look
up or use injection:
public class NewsPublisherServlet extends HttpServlet {
@EJB
private PublisherRemote p;
Cheng
Alexis Midon wrote:
> Hi all,
>
> I try to post messages into a topic from a servlet through a stateless
> ejb.
> To that aim I've followed successfully the sun jee tutorial,
> especially the clientsessionmdb example
> (javaeetutorial5\examples\jms\clientsessionmdb).
> Everything works fine in the default domain, but when it comes to test
> on my domain, I get some exceptions.
>
> In a first time, I simply copy/paste the tutorial code, having create
> the same jms resources (and use "asadmin list-*" to check)
> But at runtime some NullPointerExceptions occur :(
>
> With more logging in my PublisherBean, it seems that Glassfish does
> not consider my bean as a bean, I bean that the interceptor methods
> are not invoked, my ConnectionFactory and Topic are null, despite the
> @Resource annotations. However deployment runs fine.
>
> Next step is to understand the reason why, and that's not the easy part!
> Activating logging is useless, even FINEST on the root logger does not
> dump any additional info.
> I'm stuck with that NullPointerException.
>
> So my questions are:
> Do you no any tricks to point out the problem?
> Is there any security settings (roles, rights, etc)?
> What can be wrong?
>
> Many thanks in advance for your help!
>
> Alexis
>
> ==============================
> Servlet Source Code
> ==============================
>
> public class NewsPublisherServlet extends HttpServlet {
>
> private final String cname = this.getClass().getName();
>
> protected void service(HttpServletRequest request,
> HttpServletResponse response) throws ServletException, IOException {
> String mname = "service";
> Trace.entering(cname, mname);
>
> try {
> // Gets the PublisherBean
> new PublisherBean().publishNews();
>
> // Goes to the index page passing the request
>
> getServletContext().getRequestDispatcher("/index.jsp").forward(request,
> response);
> } catch (Exception e) {
> Trace.throwing(cname, mname, e);
>
> getServletContext().getRequestDispatcher("/error.jsp?exception=While
> publishing messages!").forward(request, response);
> }
> }
> }
>
>
> =====================================
> Exceptions
> =====================================
> [#|2006-09-26T17:33:24.962+0200|SEVERE|sun-appserver-pe9.0|javax.enterprise.system.container.web|_ThreadID=23
> ;_ThreadNam
> e=httpWorkerThread-8080-0;_RequestID=f74c3809-7e28-49c1-aad8-6c25d3c608c6;|ApplicationDispatcher[/hello]
> "Servlet.servic
> e()" pour la servlet jsp a lancé une exception
> java.lang.NullPointerException
> at org.apache.jsp.error_jsp._jspService(error_jsp.java:25)
> at
> org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java :820)
> at
> org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:353)
> at
> org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:409)
> at org.apache.jasper.servlet.JspServlet.service
> (JspServlet.java:317)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> at
> org.apache.catalina.core.ApplicationFilterChain.servletService(ApplicationFilterChain.java:397)
> at
> org.apache.catalina.core.ApplicationDispatcher.doInvoke(ApplicationDispatcher.java:850)
> at
> org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:697)
> at
> org.apache.catalina.core.ApplicationDispatcher.processRequest
> (ApplicationDispatcher.java:532)
> at
> org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:465)
> at
> org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java
> :353)
> at
> com.yaps.hello.web.servlet.jms.NewsPublisherServlet.service(Unknown
> Source)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
> at
> org.apache.catalina.core.ApplicationFilterChain.servletService
> (ApplicationFilterChain.java:397)
> at
> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:278)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:566)
>
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:536)
> at
> org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:240)
> at org.apache.catalina.core.StandardContextValve.invoke
> (StandardContextValve.java:179)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:566)
> at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:73)
> at org.apache.catalina.core.StandardHostValve.invoke
> (StandardHostValve.java:182)
> at
> org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:566)
> at
> com.sun.enterprise.web.VirtualServerPipeline.invoke(VirtualServerPipeline.java:120)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:939)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:137)
> at org.apache.catalina.core.StandardPipeline.doInvoke
> (StandardPipeline.java:566)
> at
> org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:536)
> at
> org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:939)
> at org.apache.coyote.tomcat5.CoyoteAdapter.service
> (CoyoteAdapter.java:231)
> at
> com.sun.enterprise.web.connector.grizzly.ProcessorTask.invokeAdapter(ProcessorTask.java:667)
> at
> com.sun.enterprise.web.connector.grizzly.ProcessorTask.processNonBlocked(ProcessorTask.java
> :574)
> at
> com.sun.enterprise.web.connector.grizzly.ProcessorTask.process(ProcessorTask.java:844)
> at
> com.sun.enterprise.web.connector.grizzly.ReadTask.executeProcessorTask(ReadTask.java:287)
> at
> com.sun.enterprise.web.connector.grizzly.ReadTask.doTask(ReadTask.java:212)
> at
> com.sun.enterprise.web.connector.grizzly.TaskBase.run(TaskBase.java:252)
> at com.sun.enterprise.web.connector.grizzly.WorkerThread.run
> (WorkerThread.java:75)