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From Brian Schwark <bschw...@aci-hq.com>
Subject Re: sunRise - java.lang.NullPointerException
Date Tue, 08 Oct 2002 13:35:13 GMT
Carsten, thanks for the response.

The stack trace for my problem is as follows: (Spammy...)

*type* fatal

*message* _null_

*description* _java.lang.NullPointerException_

*sender* org.apache.cocoon.servlet.CocoonServlet

*source* Cocoon servlet

*stack-trace*

java.lang.NullPointerException
	at org.apache.cocoon.sunshine.xml.XMLUtil.getNodesFromPath(XMLUtil.java:869)
	at org.apache.cocoon.sunshine.xml.XMLUtil.getNodesFromPath(XMLUtil.java:871)
	at org.apache.cocoon.sunshine.xml.XMLUtil.getNodesFromPath(XMLUtil.java:871)
	at org.apache.cocoon.sunshine.xml.XMLUtil.getNodeListFromPath(XMLUtil.java:836)
	at org.apache.cocoon.sunshine.context.SimpleSessionContext.getXML(SimpleSessionContext.java:173)
	at org.apache.cocoon.sunshine.sunrise.SunRise.isAuthenticated(SunRise.java:691)
	at org.apache.cocoon.sunshine.sunrise.SunRise.checkAuthentication(SunRise.java:766)
	at org.apache.cocoon.sunshine.sunrise.acting.AuthAction.act(AuthAction.java:122)
	at org.apache.cocoon.www.file_.C_.Program_Files.Apache_Group.Tomcat_4_1.webapps.cocoon.sitemap_xmap.matchN400948(C:\Program
Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\cocoon\cocoon-files\org/apache/cocoon/www/file_/C_/Program_Files/Apache_Group/Tomcat_4_1/webapps/cocoon\sitemap_xmap.java:10954)
	at org.apache.cocoon.www.file_.C_.Program_Files.Apache_Group.Tomcat_4_1.webapps.cocoon.sitemap_xmap.process(C:\Program
Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\cocoon\cocoon-files\org/apache/cocoon/www/file_/C_/Program_Files/Apache_Group/Tomcat_4_1/webapps/cocoon\sitemap_xmap.java:4491)
	at org.apache.cocoon.www.file_.C_.Program_Files.Apache_Group.Tomcat_4_1.webapps.cocoon.sitemap_xmap.process(C:\Program
Files\Apache Group\Tomcat 4.1\work\Standalone\localhost\cocoon\cocoon-files\org/apache/cocoon/www/file_/C_/Program_Files/Apache_Group/Tomcat_4_1/webapps/cocoon\sitemap_xmap.java:3867)
	at org.apache.cocoon.sitemap.Handler.process(Handler.java:224)
	at org.apache.cocoon.sitemap.Manager.invoke(Manager.java:179)
	at org.apache.cocoon.sitemap.SitemapManager.process(SitemapManager.java:154)
	at org.apache.cocoon.Cocoon.process(Cocoon.java:575)
	at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:999)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2350)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
	at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:171)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:641)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
	at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:643)
	at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:480)
	at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
	at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:380)
	at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:508)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:533)
	at java.lang.Thread.run(Thread.java:536)

*request-uri*

/cocoon/foo-protected

*path-info*

foo-protected

Here's the pipelines I've defined for my handler, which for testing 
purposes is just called "foo-handler".

Loginpage Pipeline:

<map:match pattern="foo-loginpage">
              <map:generate src="content/logintest/loginpage.xml" />
              <map:transform src="content/logintest/loginpage.xsl" />
              <map:transform type="encodeURL" />
              <map:serialize />
    </map:match>

Protected Resource:

<map:match pattern="foo-protected">
        <map:act type="sunRise-auth">
            <map:parameter name="handler" value="foo-handler"/>   
            <map:generate src="content/logintest/protected.xml"/>
        </map:act>       
        <map:transform src="content/logintest/protected.xsl"/>
        <map:serialize/>
</map:match>

Login Resource:

<map:match pattern="foo-login">
         <map:act type="sunRise-login">
           <map:parameter name="handler" value="foo-handler"/>
           <map:parameter name="parameter_name" value="request:name"/>
           <map:parameter name="parameter_password" 
value="request:password"/>
           <!-- If the authentication is successful then this redirect 
will be performed -->
           <map:redirect-to uri="foo-protected"/>
         </map:act>
         <!-- authentication failed: -->
         <map:generate src="login-failed.xml"/>
         <map:transform src="login-failed.xsl"/>
        <map:serialize/>
      </map:match>

Authenticatoin resource:

<map:match pattern="foo-authuser">
            <map:generate src="content/logintest/authenticate.xml" />
            <map:transform src="content/logintest/foo-user.xsl">
               <map:parameter name="use-request-parameters" value="true" />
            </map:transform>
            <map:serialize type = "xml" />
      </map:match>

My test example is rather limited, merely so that I can gain enough 
knowledge to implement sunRise. My authentication resource is creating 
the required XML file from another XML file containing usernames and 
passwords. (As per Matthew Langham's sunRise component guide, 
http://radio.weblogs.com/0103021/stories/2002/02/28/usingTheSunriseComponents.html). 
Everything I have implemented thus far is straight from his guide, in it 
you can see the syntax of the individual files of the pipeline that I 
have used.

I get completely through the login sequence, until after entering my 
username and password and being redirected back to my protected 
resource. A session does get created, because I can see it both in the 
URL and I assume a cookie is also set, because if I try to access the 
protected resource repeatedly without closing the browser, it just fails 
out with the Java null error. So I assume most things here are working 
correctly, but something little is hanging me up..

I am also working with a CVS version which is probably a good few weeks 
old (mainly to just learn everything I need to know about Cocoon before 
implementing it.), is there any possibility that sunRise may have been 
broken? I've downloaded the lastest automated CVS build and will be 
testing that to see if I fare any better.

Thanks a lot for your patience and help!

-Brian Schwark
bschwark@aci-hq.com




Carsten Ziegeler wrote:

>Please give us more information - stack trace of the exception,
>log files, sitemap etc - everything which might be appropriated
>to tell where the error occurs.
>
>Carsten
>
>  
>
>>-----Original Message-----
>>From: Brian Schwark [mailto:bschwark@aci-hq.com]
>>Sent: Monday, October 07, 2002 8:19 PM
>>To: cocoon-users@xml.apache.org
>>Subject: sunRise - java.lang.NullPointerException
>>
>>
>>Greetings everyone -
>>
>>I'm trying to get set up with sunRise. I've managed to get most of the 
>>setup complete for authentication and protection of a test resource. I'm 
>>able to enter a username and a password, and I can see in the encoded 
>>URI in the browser window that redirection to my resource occurs and a 
>>session ID is assigned, so I assume authentication and session creation 
>>is occuring as it should. When I get redirected to my requested resource 
>>after login, however, cocoon fails with a 
>>java.lang.NullPointerException. I've been trying to track down what may 
>>be causing the problem, but to no avail. I assume that if a session is 
>>indeed being created, my authentication resource is returning valid XML 
>>in the required format and the sunRise-login action is succeeding. The 
>>documents I'm generating for my protected resource aren't to blame, 
>>since if protection is taken off, they serialize just fine.
>>
>>Any ideas as to where I'm hitting a wall? All help greatly appreciated!
>>
>>-Brian Schwark
>>bschwark@aci-hq.com
>>
>>
>>
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>
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