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Hubert Dabrowski
ClassCastException while overriding struts action
April 16, 2012 6:20 AM
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Hubert Dabrowski

Rank: New Member

Posts: 2

Join Date: April 16, 2012

Recent Posts

Hello,

I'm trying to override struts actions EditConfigurationAction and UpdateLayoutAction but Liferay throws an exception while opening any portlet configuration or adding a portlet to page. Other actions like EditTemplateAction are working correctly.

I've tried this on both 6.1.0 and 6.1.0 GA1.

 1
 2<?xml version="1.0"?>
 3<!DOCTYPE hook PUBLIC "-//Liferay//DTD Hook 6.1.0//EN" "http://www.liferay.com/dtd/liferay-hook_6_1_0.dtd">
 4
 5<hook>   
 6    <portal-properties>portal.properties</portal-properties>
 7    <language-properties>content/Language.properties</language-properties>
 8    <language-properties>content/Language_en.properties</language-properties>
 9    <language-properties>content/Language_pl.properties</language-properties>
10    <struts-action>
11        <struts-action-path>/portlet_configuration/edit_configuration</struts-action-path>
12        <struts-action-impl>pl.eo.liferay.audit.action.EditConfigurationActionHook</struts-action-impl>
13    </struts-action>
14    <struts-action>
15        <struts-action-path>/portal/update_layout</struts-action-path>
16        <struts-action-impl>pl.eo.liferay.audit.action.UpdateLayoutActionHook</struts-action-impl>
17    </struts-action>
18</hook>

Action:
1
2public class EditConfigurationActionHook extends BaseStrutsAction {   
3    @Override
4    public String execute(StrutsAction originalStrutsAction,
5            HttpServletRequest request, HttpServletResponse response)
6            throws Exception {
7        return originalStrutsAction.execute(originalStrutsAction, request, response);
8    }

Exception:
 1
 2ERROR [render_portlet_jsp:154] java.lang.ClassCastException: com.liferay.portal.struts.ActionAdapter cannot be cast to com.liferay.portal.struts.PortletActionAdapter
 3        at com.liferay.portal.struts.PortletRequestProcessor.processActionCreate(PortletRequestProcessor.java:304)
 4        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:230)
 5        at com.liferay.portal.struts.PortletRequestProcessor.process(PortletRequestProcessor.java:230)
 6        at com.liferay.portlet.StrutsPortlet.include(StrutsPortlet.java:239)
 7        at com.liferay.portlet.StrutsPortlet.doView(StrutsPortlet.java:152)
 8        at com.liferay.portal.kernel.portlet.LiferayPortlet.doDispatch(LiferayPortlet.java:211)
 9        at javax.portlet.GenericPortlet.render(GenericPortlet.java:233)
10        at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:100)
11        at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:64)
12        at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:651)
13        at com.liferay.portlet.InvokerPortletImpl.invokeRender(InvokerPortletImpl.java:722)
14        at com.liferay.portlet.InvokerPortletImpl.render(InvokerPortletImpl.java:426)
15        at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(render_005fportlet_jsp.java:1215)
16        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
17        at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
18        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
19        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
20        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
21        at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
22        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

Action:
 1
 2public class UpdateLayoutActionHook extends BaseStrutsPortletAction {
 3    @Override
 4    public void processAction(StrutsPortletAction originalStrutsPortletAction,
 5            PortletConfig portletConfig, ActionRequest actionRequest,
 6            ActionResponse actionResponse) throws Exception {
 7        originalStrutsPortletAction.processAction(originalStrutsPortletAction, portletConfig, actionRequest, actionResponse);
 8    }
 9}

Exception:
 1
 2ERROR [StripFilter:59] java.lang.ClassCastException: com.liferay.portal.struts.PortletActionAdapter cannot be cast to com.liferay.portal.struts.ActionAdapter
 3java.lang.ClassCastException: com.liferay.portal.struts.PortletActionAdapter cannot be cast to com.liferay.portal.struts.ActionAdapter
 4        at com.liferay.portal.struts.PortalRequestProcessor.processActionCreate(PortalRequestProcessor.java:485)
 5        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:230)
 6        at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:174)
 7        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
 8        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
 9        at javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
10        at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:533)
11        at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:510)
12        at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
13        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
14        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
15        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:72)
16        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121)
17        at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:304)
18        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48)
19        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203)
20        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105)
21        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:113)
22        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121)
23        at com.liferay.portal.servlet.filters.gzip.GZipFilter.processFilter(GZipFilter.java:123)
24        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48)
25        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203)
26        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105)
27        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121)
28        at com.liferay.portal.servlet.filters.secure.SecureFilter.processFilter(SecureFilter.java:201)
29        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48)
30        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203)
31        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105)
32        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121)
33        at com.liferay.portal.servlet.filters.sso.ntlm.NtlmPostFilter.processFilter(NtlmPostFilter.java:83)
34        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48)
35        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203)
36        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105)
37        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121)
38        at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:80)
39        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48)
40        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203)
41        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105)
42        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:121)
43        at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:209)
44        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:48)
45        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203)
46        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105)
47        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:184)
48        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:92)
49        at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:738)
50        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:203)
51        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:105)
52        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:164)
53        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:92)
54        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:164)
55        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:92)
56        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:184)
57        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:92)
58        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:70)
59        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
60        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
61        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
62        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
63        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
64        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
65        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
66        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:928)
67        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
68        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
69        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
70        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:539)
71        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:300)
72        at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
73        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
74        at java.lang.Thread.run(Thread.java:662)


I was unable to find a reason why this doesn't work so could someone tell me whether I'm doing anything wrong or is it a Liferay bug?

Regards
Hubert
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David H Nebinger
RE: ClassCastException while overriding struts action
April 16, 2012 6:36 AM
Answer

David H Nebinger

Rank: Liferay Legend

Posts: 4496

Join Date: September 1, 2006

Recent Posts

Class cast exceptions for the same class are always class loader issues.

You didn't mention how you were deploying this; I'm guessing a hook, which won't work because it's in a different class loader than the portal.
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Hubert Dabrowski
RE: ClassCastException while overriding struts action
April 16, 2012 6:51 AM
Answer

Hubert Dabrowski

Rank: New Member

Posts: 2

Join Date: April 16, 2012

Recent Posts

Does this mean there is currently no way to use a hook to override a struts action that is a part of the portal and not one of its portlets?

I'm asking because there is no information about such limitation and I've successfully overriden actions from portlets that are bundled with Liferay.
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David H Nebinger
RE: ClassCastException while overriding struts action
April 16, 2012 6:53 AM
Answer

David H Nebinger

Rank: Liferay Legend

Posts: 4496

Join Date: September 1, 2006

Recent Posts

That's pretty much it. I know folks have tried overriding struts actions via a hook, you might try searching the forums for a possible solution.

The easiest method is to do this via an EXT plugin, since you don't have to worry about the class loader issues at that point. And hey, that's what the ext plugin is for...
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Ondřej Životský
RE: ClassCastException while overriding struts action
October 1, 2012 7:18 AM
Answer

Ondřej Životský

Rank: New Member

Posts: 13

Join Date: March 11, 2011

Recent Posts

I got the same problem today, so for everyone who has this problem...

1) first Exception - ActionAdapter cannot be cast to PortletActionAdapter - means you implemneted BaseStrutsAction instead of BaseStrutsPortletAction
2) second Exception - PortletActionAdapter cannot be cast to ActionAdapter - means you implemneted BaseStrutsPortletAction instead of BaseStrutsAction

I hope it helps someone
Ondrej
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Angelos Varvitsiotis
RE: ClassCastException while overriding struts action
March 26, 2013 7:25 AM
Answer

Angelos Varvitsiotis

Rank: New Member

Posts: 6

Join Date: July 26, 2011

Recent Posts

You sure did help me! I was trying to add a configuration tab by hook'ing the portlet_configuration portlet. Extending BaseStrutsPortletAction and returning the right forward did the trick. Thanks!
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