[jboss-user] [JBoss Portal] - Jboss portal 2.7.2 portlet ClassCast Exception
Debopam Poddar
do-not-reply at jboss.com
Sun Apr 18 14:39:42 EDT 2010
Debopam Poddar [http://community.jboss.org/people/dpoddar] created the discussion
"Jboss portal 2.7.2 portlet ClassCast Exception"
To view the discussion, visit: http://community.jboss.org/message/538183#538183
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I am new to portlet developmet. I was trying to develop and deploy simple portlet in Jboss portal 2.7.2 and Jboss AS 4.2.3/
Following is the code
Portlet extending GenericPortlet
> package com.sampleportlet;
>
> import java.io.IOException;
>
> import javax.portlet.ActionRequest;
> import javax.portlet.ActionResponse;
> import javax.portlet.GenericPortlet;
> import javax.portlet.PortletConfig;
> import javax.portlet.PortletException;
> import javax.portlet.PortletRequestDispatcher;
> import javax.portlet.RenderRequest;
> import javax.portlet.RenderResponse;
> import javax.portlet.UnavailableException;
>
>
>
> public class First extends GenericPortlet {
>
>
>
> public void init(PortletConfig portletConfig) throws UnavailableException,
> PortletException {
> super.init(portletConfig);
> }
>
> /**
> * Helper method to serve up the mandatory view mode.
> */
> protected void doHelp(RenderRequest request, RenderResponse response)
> throws PortletException, IOException {
> response.setContentType("text/html");
> PortletRequestDispatcher dispatcher = getPortletContext()
> .getRequestDispatcher("/WEB-INF/jsp/First_help.jsp");
> dispatcher.include(request, response);
> }
>
> /**
> * Helper method to serve up the mandatory view mode.
> */
> protected void doEdit(RenderRequest request, RenderResponse response)
> throws PortletException, IOException {
> response.setContentType("text/html");
> PortletRequestDispatcher dispatcher = getPortletContext()
> .getRequestDispatcher("/WEB-INF/jsp/First_edit.jsp");
> dispatcher.include(request, response);
> }
>
> /**
> * Helper method to serve up the mandatory view mode.
> */
> protected void doView(RenderRequest request, RenderResponse response)
> throws PortletException, IOException {
> response.setContentType("text/html");
>
> String name = (String) request.getParameter("name");
>
> if (name != null) {
> PortletRequestDispatcher reqDispatcher = getPortletContext()
> .getRequestDispatcher("/WEB-INF/jsp/First_view.jsp");
> request.setAttribute("name", name);
> reqDispatcher.include(request, response);
> } else {
> PortletRequestDispatcher reqDispatcher = getPortletContext()
> .getRequestDispatcher("/WEB-INF/jsp/First_edit.jsp");
> reqDispatcher.include(request, response);
> }
> }
>
> public void processAction(ActionRequest actionRequest,
> ActionResponse actionResponse) throws PortletException,
> IOException, UnavailableException {
> String name = (String) actionRequest.getParameter("name");
>
> // send name back to view
> actionResponse.setRenderParameter("name", name);
> }
>
>
WEB-INF/portlet.xml
> <?xml version="1.0" encoding="UTF-8"?>
> <portlet-app xmlns=" http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd"
> xmlns:xsi=" http://www.w3.org/2001/XMLSchema-instance http://www.w3.org/2001/XMLSchema-instance"
> xsi:schemaLocation=" http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd"
> version="2.0">
> <portlet>
> <portlet-name>FirstJspPortlet</portlet-name>
> <display-name>First Portlet</display-name>
> <portlet-class>com.sampleportlet.First</portlet-class>
> <supports>
> <mime-type>text/html</mime-type>
> <portlet-mode>VIEW</portlet-mode>
> <portlet-mode>EDIT</portlet-mode>
> <portlet-mode>HELP</portlet-mode>
> </supports>
> <portlet-info>
> <title>First Portlet</title>
> </portlet-info>
> </portlet>
>
> </portlet-app>
WEB-INF/portlet-instances.xml
> <?xml version="1.0" standalone="yes"?>
> <deployments>
> <deployment>
> <instance>
> <instance-id>FirstPortletInstance</instance-id>
> <portlet-ref>FirstJspPortlet</portlet-ref>
> </instance>
> </deployment>
> </deployments>
WEB-INF/firstjspportlet-object.xml
> <?xml version="1.0" encoding="UTF-8"?>
> <deployments>
> <deployment>
> <if-exists>overwrite</if-exists>
> <parent-ref>default.default</parent-ref>
> <window>
> <window-name>FirstPortletWindow</window-name>
> <content>
> <content-type>portlet</content-type>
> <content-uri>FirstPortletInstance</content-uri>
> </content>
> <region>center</region>
> <height>1</height>
> </window>
> </deployment>
> </deployments>
WEB-INF/Jboss-portlet.xml
> <?xml version="1.0" encoding="UTF-8"?>
> <!DOCTYPE portlet-app PUBLIC "-//JBoss Portal//DTD JBoss Portlet 2.6//EN"
> " http://www.jboss.org/portal/dtd/jboss-portlet_2_6.dtd http://www.jboss.org/portal/dtd/jboss-portlet_2_6.dtd">
>
> <portlet-app>
> <remotable>true</remotable>
> <portlet>
> <portlet-name>FirstJspPortlet</portlet-name>
> </portlet>
> </portlet-app>
Error I am getting is
> 2010-04-18 22:09:22,953 DEBUG [org.jboss.portal.portlet.container.com_sampleportlet_First] Loading portlet class com.sampleportlet.First
> 2010-04-18 22:09:22,958 DEBUG [org.jboss.portal.portlet.container.com_sampleportlet_First] Creating portlet object com.sampleportlet.First
> 2010-04-18 22:09:22,962 ERROR [org.jboss.portal.portlet.impl.container.LifeCycle] Cannot start object
> org.jboss.portal.portlet.container.PortletInitializationException: The portlet FirstJspPortlet threw a runtime exception during init
> at org.jboss.portal.portlet.impl.jsr168.PortletContainerImpl.start(PortletContainerImpl.java:288)
> at org.jboss.portal.portlet.impl.container.PortletContainerLifeCycle.invokeStart(PortletContainerLifeCycle.java:76)
> at org.jboss.portal.portlet.impl.container.LifeCycle.managedStart(LifeCycle.java:92)
> at org.jboss.portal.portlet.impl.container.PortletApplicationLifeCycle.startDependents(PortletApplicationLifeCycle.java:351)
> at org.jboss.portal.portlet.impl.container.LifeCycle.managedStart(LifeCycle.java:128)
> at org.jboss.portal.portlet.deployment.jboss.PortletAppDeployment.start(PortletAppDeployment.java:226)
> at org.jboss.portal.core.deployment.jboss.PortletAppDeployment.start(PortletAppDeployment.java:94)
> at org.jboss.portal.server.deployment.jboss.DeploymentContext.start(DeploymentContext.java:99)
> at org.jboss.portal.server.deployment.jboss.PortalDeploymentInfoContext.start(PortalDeploymentInfoContext.java:220)
> at org.jboss.portal.server.deployment.jboss.ServerDeployer.start(ServerDeployer.java:217)
> at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
> at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
> at sun.reflect.GeneratedMethodAccessor212.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
> at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
> at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
> at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
> at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
> at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
> at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
> at $Proxy222.deploy(Unknown Source)
> at org.jboss.portal.server.deployment.jboss.ServerDeployer.deploy(ServerDeployer.java:259)
> at org.jboss.portal.server.deployment.WebAppAdapter.deploy(WebAppAdapter.java:53)
> at org.jboss.portal.server.deployment.WebAppIntercepter.handleNotification(WebAppIntercepter.java:159)
> at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.jboss.mx.notification.NotificationListenerProxy.invoke(NotificationListenerProxy.java:153)
> at $Proxy224.handleNotification(Unknown Source)
> at org.jboss.mx.util.JBossNotificationBroadcasterSupport.handleNotification(JBossNotificationBroadcasterSupport.java:127)
> at org.jboss.mx.util.JBossNotificationBroadcasterSupport.sendNotification(JBossNotificationBroadcasterSupport.java:108)
> at org.jboss.deployment.SubDeployerSupport.emitNotification(SubDeployerSupport.java:340)
> at org.jboss.deployment.SubDeployerSupport.start(SubDeployerSupport.java:308)
> at org.jboss.web.AbstractWebContainer.start(AbstractWebContainer.java:482)
> at sun.reflect.GeneratedMethodAccessor105.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
> at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
> at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
> at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
> at org.jboss.mx.interceptor.DynamicInterceptor.invoke(DynamicInterceptor.java:97)
> at org.jboss.system.InterceptorServiceMBeanSupport.invokeNext(InterceptorServiceMBeanSupport.java:238)
> at org.jboss.wsf.container.jboss42.DeployerInterceptor.start(DeployerInterceptor.java:87)
> at org.jboss.deployment.SubDeployerInterceptorSupport$XMBeanInterceptor.start(SubDeployerInterceptorSupport.java:188)
> at org.jboss.deployment.SubDeployerInterceptor.invoke(SubDeployerInterceptor.java:95)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
> at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
> at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
> at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
> at $Proxy202.start(Unknown Source)
> at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
> at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
> at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
> at sun.reflect.GeneratedMethodAccessor26.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
> at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
> at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
> at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
> at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
> at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
> at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
> at $Proxy9.deploy(Unknown Source)
> at org.jboss.deployment.scanner.URLDeploymentScanner.deploy(URLDeploymentScanner.java:421)
> at org.jboss.deployment.scanner.URLDeploymentScanner.scan(URLDeploymentScanner.java:634)
> at org.jboss.deployment.scanner.AbstractDeploymentScanner$ScannerThread.doScan(AbstractDeploymentScanner.java:263)
> at org.jboss.deployment.scanner.AbstractDeploymentScanner.startService(AbstractDeploymentScanner.java:336)
> at org.jboss.system.ServiceMBeanSupport.jbossInternalStart(ServiceMBeanSupport.java:289)
> at org.jboss.system.ServiceMBeanSupport.jbossInternalLifecycle(ServiceMBeanSupport.java:245)
> at sun.reflect.GeneratedMethodAccessor3.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
> at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
> at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
> at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
> at org.jboss.system.ServiceController$ServiceProxy.invoke(ServiceController.java:978)
> at $Proxy0.start(Unknown Source)
> at org.jboss.system.ServiceController.start(ServiceController.java:417)
> at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
> at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:86)
> at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
> at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
> at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
> at $Proxy4.start(Unknown Source)
> at org.jboss.deployment.SARDeployer.start(SARDeployer.java:304)
> at org.jboss.deployment.MainDeployer.start(MainDeployer.java:1025)
> at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:819)
> at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:782)
> at org.jboss.deployment.MainDeployer.deploy(MainDeployer.java:766)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:155)
> at org.jboss.mx.server.Invocation.dispatch(Invocation.java:94)
> at org.jboss.mx.interceptor.AbstractInterceptor.invoke(AbstractInterceptor.java:133)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
> at org.jboss.mx.interceptor.ModelMBeanOperationInterceptor.invoke(ModelMBeanOperationInterceptor.java:142)
> at org.jboss.mx.server.Invocation.invoke(Invocation.java:88)
> at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264)
> at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:659)
> at org.jboss.mx.util.MBeanProxyExt.invoke(MBeanProxyExt.java:210)
> at $Proxy5.deploy(Unknown Source)
> at org.jboss.system.server.ServerImpl.doStart(ServerImpl.java:482)
> at org.jboss.system.server.ServerImpl.start(ServerImpl.java:362)
> at org.jboss.Main.boot(Main.java:200)
> at org.jboss.Main$1.run(Main.java:508)
> at java.lang.Thread.run(Thread.java:613)
> Caused by: java.lang.ClassCastException: com.sampleportlet.First
> at org.jboss.portal.portlet.impl.jsr168.PortletContainerImpl.start(PortletContainerImpl.java:254)
Please let me know what needs to be changed.
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