struts2 + interceptor

[debraj mallick]

hi all,
i am using struts2.1.8, JDK 6 and tomcat7
i am getting exception like

ERROR com.opensymphony.xwork2.util.DomHelper.error:27 - The content of element type "package" must match "(result-types?,interceptors?,default-interceptor-ref?,default-action-ref?,default-class-ref?,global-results?,global-exception-mappings?,action*)". at (null:314:15)
org.xml.sax.SAXParseException: The content of element type "package" must match "(result-types?,interceptors?,default-interceptor-ref?,default-action-ref?,default-class-ref?,global-results?,global-exception-mappings?,action*)".
	at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)
	at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(ErrorHandlerWrapper.java:131)
	at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:384)
	at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(XMLErrorReporter.java:318)
	at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.handleEndElement(XMLDTDValidator.java:2017)
	at com.sun.org.apache.xerces.internal.impl.dtd.XMLDTDValidator.endElement(XMLDTDValidator.java:901)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1782)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2938)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:648)
	at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:140)
	at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:511)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:808)
	at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:737)
	at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:119)
	at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1205)
	at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:522)
	at javax.xml.parsers.SAXParser.parse(SAXParser.java:395)
	at com.opensymphony.xwork2.util.DomHelper.parse(DomHelper.java:113)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:893)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadConfigurationFiles(XmlConfigurationProvider.java:945)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.loadDocuments(XmlConfigurationProvider.java:143)
	at com.opensymphony.xwork2.config.providers.XmlConfigurationProvider.init(XmlConfigurationProvider.java:110)
	at com.opensymphony.xwork2.config.impl.DefaultConfiguration.reloadContainer(DefaultConfiguration.java:168)
	at com.opensymphony.xwork2.config.ConfigurationManager.getConfiguration(ConfigurationManager.java:55)
	at org.apache.struts2.dispatcher.Dispatcher.init_PreloadConfiguration(Dispatcher.java:374)
	at org.apache.struts2.dispatcher.Dispatcher.init(Dispatcher.java:418)
	at org.apache.struts2.dispatcher.ng.InitOperations.initDispatcher(InitOperations.java:69)
	at org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter.init(StrutsPrepareAndExecuteFilter.java:51)
	at org.apache.catalina.core.ApplicationFilterConfig.initFilter(ApplicationFilterConfig.java:273)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:254)
	at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:372)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:98)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4542)
	at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5220)
	at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5215)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:662)

my struts.xml is

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <constant name="struts.objectFactory" value="spring" />
    <package name="utility" namespace="/" extends="struts-default,json-default">
       
       <global-results>
             <result name ="sessionout">/pages/web/login.jsp</result>
         </global-results>
       <interceptors>
            <interceptor name="validateUserSession" class="com.web.action.ValidateUserSession"></interceptor>
            <interceptor-stack name = "defaultLoginStack">
                 <interceptor-ref name = "servlet-config" />
                 <interceptor-ref name = "params" />
                 <interceptor-ref name = "validateUserSession" />
                 <interceptor-ref name = "prepare" />
                 <interceptor-ref name = "chain" />
                 <interceptor-ref name = "model-driven" />                
                 <interceptor-ref name = "static-params" />
                 <interceptor-ref name = "params" />
                 <interceptor-ref name = "conversionError" />  
                 <interceptor-ref name = "workflow" />
             </interceptor-stack>
        </interceptors>
        
        <result-types>
            <result-type name="tiles" class="org.apache.struts2.views.tiles.TilesResult" />
        </result-types>

     <action name="me" method="me" class="com.web.action.MyAction">
            <interceptor-ref name = "defaultLoginStack" /> 
            <result name="open" type="tiles">myfileslayout</result>
        </action>

    </package>
</struts>

if i remove the interceptor then everthing works fine, any help would be appreciated.

[debraj mallick]

hi all,
problem is solved partially, it is the order for which i was getting exception, it should be like

<result-types>  
          ...
</result-types> 
<interceptors>
    ...
</interceptors>
<global-results>
   ...
</global-results>

but if i use

<action name="me" method="me" class="com.web.action.MyAction">  
     <interceptor-ref name = "defaultLoginStack" />  
     <result name="open" type="tiles">myfileslayout</result>  
 </action>  

then its woking fine but when i use

<default-interceptor-ref name="defaultLoginStack"/>

i am getting null pointer exception while updating any record

[Mohana Rao Sv]

where you are getting null pointer exception exactly, be remember interceptors follow the order how you defined it.