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Re: Trouble creating directory templates

From: Martin Wille <m@ifib.uni-karlsruhe.de>
Date: Tue, 10 Jun 1997 12:33:33 +0200
Message-Id: <199706101033.MAA04495@ifib7.ifib.uni-karlsruhe.de>
To: www-jigsaw@w3.org
> Amy Fong wrote:
> 
> > Everytime I try to do a "Add directory" in directory templates,
> > it always replies with "Document contains no data" and in the errlog,
> > I keep getting:
> > 
> > client-1: caught ClientException: [w3c.jigsaw.http.ClientException] null
> > 
> > And it never gets added. Any ideas?
> 
> I have exactly the same problem and don't know how to solve it. 
> Everything works just fine in Jigsaw version 1.0alpha3, but in 1.0alpha5
> the described problem arises. I have tried with different versions of JDK, 
> but without luck. This is obviously a problem that would have been 
> discovered by the Jigsaw team, in case it were a bug. It must be me
> who is doing something wrong. Nevertheless I sent a "bug report" to 
> jigsaw@w3.org last week. After joining the mailing list I feel that
> this list might be a better place to drop my report. Here it is:
> 
> 
> Dear Jigsaw developers
> 
> I have successfully installed and started Jigsaw 1.0alpha5. I go to
> /Admin/Directories, get the desired form called "Defined directories" and
> see that User and WWW are already defined. I now want to add a new template,
> therefore I click on link "Add directory" and correctly get the form called
> "Add a new directory." I fill in "Name:" with "TestDir" and "Class:" with
> "w3c.jigsaw.resources.DirectoryResource". Finally I push the OK button. 
> 
> The following happens: In the browser window a blank page appears, and a   
> pop-up window says "Document contains no data". Meanwhile the shell windows
> from which Jigsaw was started emits (Jigsaw tracing has been turned on) the
> following error messages:
> 
> POST /Admin/Directories/Add+directory HTTP/1.0
> Proxy-Connection: Keep-Alive
> Date: Wed, 28 May 1997 09:32:42 GMT
> Content-Length: 67
> Content-Type: application/x-www-form-urlencoded
> Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, */*
> Accept-Charset: iso-8859-1,*,utf-8
> Host: ida:8001
> Referer: http://ida:8001/Admin/Directories/Add+directory
> User-Agent: Mozilla/4.0b3C (X11; I; SunOS 5.5.1 sun4m)
>  
> +++ client-33 got exception:
> java.lang.NullPointerException
>         at java.util.Hashtable.put(Hashtable.java)
>         at w3c.jigsaw.indexer.Directory.initialize(Directory.java)
>         at w3c.tools.store.AttributeHolder.initialize(AttributeHolder.java)
>         at w3c.jigsaw.indexer.Directory.makeDirectory(Directory.java)
>         at 
> w3c.jigsaw.indexer.DirectoriesAddHandler.notifyEndProcessing(DirectoriesEditor.j
> ava)
>         at w3c.jigsaw.forms.FormCardResource.handle(FormCardResource.java)
>         at w3c.jigsaw.forms.PostableResource.post(PostableResource.java)
>         at w3c.jigsaw.resources.HTTPResource.dispatch(HTTPResource.java)
>         at w3c.jigsaw.resources.HTTPResource.perform(HTTPResource.java)
>         at w3c.jigsaw.http.httpd.perform(httpd.java)
>         at w3c.jigsaw.http.Client.processRequest(Client.java)
>         at w3c.jigsaw.http.Client.startConnection(Client.java)
>         at w3c.jigsaw.http.socket.SocketClient.run(SocketClient.java)
>         at w3c.util.CachedThread.run(ThreadCache.java)
> w3c.jigsaw.http.ClientException
>         at w3c.jigsaw.http.Client.startConnection(Client.java)
>         at w3c.jigsaw.http.socket.SocketClient.run(SocketClient.java)
>         at w3c.util.CachedThread.run(ThreadCache.java)
> java.lang.NullPointerException
>         at java.util.Hashtable.put(Hashtable.java)
>         at w3c.jigsaw.indexer.Directory.initialize(Directory.java)
>         at w3c.tools.store.AttributeHolder.initialize(AttributeHolder.java)
>         at w3c.jigsaw.indexer.Directory.makeDirectory(Directory.java)
>         at 
> w3c.jigsaw.indexer.DirectoriesAddHandler.notifyEndProcessing(DirectoriesEditor.j
> ava)
>         at w3c.jigsaw.forms.FormCardResource.handle(FormCardResource.java)
>         at w3c.jigsaw.forms.PostableResource.post(PostableResource.java)
>         at w3c.jigsaw.resources.HTTPResource.dispatch(HTTPResource.java)
>         at w3c.jigsaw.resources.HTTPResource.perform(HTTPResource.java)
>         at w3c.jigsaw.http.httpd.perform(httpd.java)
>         at w3c.jigsaw.http.Client.processRequest(Client.java)
>         at w3c.jigsaw.http.Client.startConnection(Client.java)
>         at w3c.jigsaw.http.socket.SocketClient.run(SocketClient.java)
>         at w3c.util.CachedThread.run(ThreadCache.java)
> client-33: caught ClientException: [w3c.jigsaw.http.ClientException] null
> 
> 
> 
>  
> Best regards, 
> 
>    Anders Gammelgaard
>    
> =============================================================
> Anders Gammelgaard          | email:  ag@delta.dk
> Delta, Danish Electronics,  |  
>        Light & Acoustics    |  phone:  +45 42 86 77 22
> Venlighedsvej 4             |  direct: +45 45 76 76 22 - 283
> 2970 Hørsholm               |   
> Denmark                     |  fax:    +45 42 86 58 98
> =============================================================
> 
>  
> 
I had the same Problem, and I tracked it down to w3c.jigsaw.indexer.Directory, 
line 89:
	defs.put("resource-store", getResourceStore());

It seems that getResourceStore() returns null, when a template is beeing 
created. Hashtables don't accept null-values.
Changing that line to
        ResourceStore s=getResourceStore();
        if(s!=null) defs.put("resource-store", s);

seemed to help, but I am pretty shure that this is not a proper solution (it 
could be dangerous). Im am not an expert in jigsaw programming, perhaps 
somebody could use this as a hint for further debugging.

Regards,
Martin Wille
Received on Tuesday, 10 June 1997 06:38:21 GMT

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