Re: Plugin ClassCastException

Mon, 22 Sep 2008 01:04:50 -0700 

Hi,

problem is still actual :( !
I have already installed a new JSPWiki version and downloaded the actual JSPWiki src and imported it into my Eclipse- still same error. 


I compared the working plugin and the new one and there is one 
difference in the .classpath file (contained in the .jar):

the working one says:
<classpathentry kind="src" path="/JSPWiki"/>

and the not working one:
<classpathentry combineaccessrules="false" kind="src" path="/JSPWiki"/>

Dont know if that matters, but I tried to fixx it, but I don't get it.

Help is welcome,
Benedikt


Janne Jalkanen schrieb:



In that case my guess is that your classpath contains two copies of 
JSPWiki.jar with different versions...  Or, that Eclipse is using a 
different version of JSPWiki.jar than your actual instance of JSPWiki.


/Janne

On 21 Sep 2008, at 14:25, Benedikt Mohrmann wrote:


Hi,

I already do so.
As a test, I just tried the following class:


import com.ecyrd.jspwiki.WikiContext;
import com.ecyrd.jspwiki.plugin.PluginException;
import com.ecyrd.jspwiki.plugin.WikiPlugin;


public class ReadRoomStructurePlugin implements WikiPlugin {

   public String execute(WikiContext context, Map params)
           throws PluginException {
       // TODO Auto-generated method stub
       return "x";
   }

}


Same error as before!

Regards
Benedikt


Janne Jalkanen schrieb:


You must implement the WikiPlugin interface.

public class ReadRoomStructurePlugin implements WikiPlugin
{
...
}

/Janne

On 21 Sep 2008, at 14:07, Benedikt Mohrmann wrote:


Hi,

I already developed a plugin, which works quite well.

Now I tried to develope a new one, export it via Eclipse as a .jar 
file, but when I visit the page, where it should be inserted I get 
the error:

"Instanziierung des Plugins 'ReadRoomStructurePlugin' fehlgeschlagen."
English: "Instantiation of Plugin 'ReadRoomStructurePlugin' failed.

The Stacktrace says:


2008-09-21 12:48:18,421 [http-localhost%2F127.0.0.1-8080-1] INFO 
com.ecyrd.jspwiki.plugin.PluginManager JSPWiki:/JSPWiki/ 
JSPWiki:http://localhost:8080/JSPWiki/ - Cannot initialize plugin 
ReadRoomStructurePlugin
java.lang.ClassCastException: ReadRoomStructurePlugin cannot be 
cast to com.ecyrd.jspwiki.plugin.WikiPlugin
   at 
com.ecyrd.jspwiki.plugin.PluginManager$WikiPluginInfo.newPluginInstance(PluginManager.java:868) 

   at 
com.ecyrd.jspwiki.plugin.PluginManager$WikiPluginInfo.initializePlugin(PluginManager.java:794) 

   at 
com.ecyrd.jspwiki.plugin.PluginManager.registerPlugin(PluginManager.java:683) 

   at 
com.ecyrd.jspwiki.plugin.PluginManager.execute(PluginManager.java:348)

   at com.ecyrd.jspwiki.forms.FormOutput.execute(FormOutput.java:127)

   at 
com.ecyrd.jspwiki.plugin.PluginManager.execute(PluginManager.java:383)
   at 
com.ecyrd.jspwiki.parser.PluginContent.getText(PluginContent.java:158)
   at 
org.jdom.output.XMLOutputter.printTextRange(XMLOutputter.java:1054)

   at org.jdom.output.XMLOutputter.printElement(XMLOutputter.java:934)

   at 
org.jdom.output.XMLOutputter.printContentRange(XMLOutputter.java:1007)
   at 
org.jdom.output.XMLOutputter.outputElementContent(XMLOutputter.java:445) 

   at 
com.ecyrd.jspwiki.render.XHTMLRenderer.getString(XHTMLRenderer.java:63) 

   at 
com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.java:258) 

   at 
com.ecyrd.jspwiki.render.RenderingManager.getHTML(RenderingManager.java:299) 


   at com.ecyrd.jspwiki.WikiEngine.textToHTML(WikiEngine.java:1469)
   at com.ecyrd.jspwiki.WikiEngine.getHTML(WikiEngine.java:1411)

   at 
com.ecyrd.jspwiki.tags.InsertPageTag.doWikiStartTag(InsertPageTag.java:128) 

   at 
com.ecyrd.jspwiki.tags.WikiTagBase.doStartTag(WikiTagBase.java:89)
   at 
org.apache.jsp.templates.default_.PageTab_jsp._jspx_meth_wiki_005fInsertPage_005f0(PageTab_jsp.java:677) 

   at 
org.apache.jsp.templates.default_.PageTab_jsp._jspService(PageTab_jsp.java:277) 

   at 
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

   at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373) 

   at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336) 

   at 
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)

   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

   at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 

   at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 

   at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654) 

   at 
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:557) 

   at 
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:481) 

   at 
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968) 

   at 
org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:609) 


   at com.ecyrd.jspwiki.tags.IncludeTag.doEndTag(IncludeTag.java:84)

   at 
org.apache.jsp.templates.default_.PageContent_jsp._jspx_meth_wiki_005fInclude_005f0(PageContent_jsp.java:442) 

   at 
org.apache.jsp.templates.default_.PageContent_jsp._jspService(PageContent_jsp.java:148) 

   at 
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

   at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373) 

   at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336) 

   at 
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)

   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

   at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 

   at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 

   at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654) 

   at 
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:557) 

   at 
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:481) 

   at 
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968) 

   at 
org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:609) 


   at com.ecyrd.jspwiki.tags.ContentTag.doEndTag(ContentTag.java:126)

   at 
org.apache.jsp.templates.default_.ViewTemplate_jsp._jspx_meth_wiki_005fContent_005f0(ViewTemplate_jsp.java:566) 

   at 
org.apache.jsp.templates.default_.ViewTemplate_jsp._jspService(ViewTemplate_jsp.java:142) 

   at 
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

   at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373) 

   at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336) 

   at 
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)

   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

   at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 

   at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 

   at 
org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:654) 

   at 
org.apache.catalina.core.ApplicationDispatcher.doInclude(ApplicationDispatcher.java:557) 

   at 
org.apache.catalina.core.ApplicationDispatcher.include(ApplicationDispatcher.java:481) 

   at 
org.apache.jasper.runtime.JspRuntimeLibrary.include(JspRuntimeLibrary.java:968) 

   at 
org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:609) 


   at com.ecyrd.jspwiki.tags.IncludeTag.doEndTag(IncludeTag.java:84)
   at org.apache.jsp.Wiki_jsp._jspService(Wiki_jsp.java:114)

   at 
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)

   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

   at 
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:373) 

   at 
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:336) 

   at 
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)

   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

   at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) 

   at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 

   at 
com.ecyrd.jspwiki.ui.WikiServletFilter.doFilter(WikiServletFilter.java:99) 

   at 
com.ecyrd.jspwiki.ui.WikiJSPFilter.doFilter(WikiJSPFilter.java:91)
   at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 

   at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 

   at 
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) 

   at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) 

   at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) 

   at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230) 

   at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175) 

   at 
org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:182) 

   at 
org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:84) 

   at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) 

   at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) 

   at 
org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:157) 

   at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) 

   at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:262) 

   at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844) 

   at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583) 

   at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:446) 


   at java.lang.Thread.run(Unknown Source)


Any idea, why it is not able to cast ?

Regards
Benedikt




























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