[topicmapmail] Newbee: help!

[Kal Ahmed]

Hi Rolf,

The best place to ask questions on TM4J is the TM4J Users list:
https://lists.sourceforge.net/lists/listinfo/tm4j-users

In answer to your question, my guess is that System.getProperties() is
returning null. As you are using the in-memory topic map provider and
probably don't need to pass any initialisation parameters to the
provider, replace

Properties backendProps = System.getProperties();

with

Properties backendProps = new Properties();

BTW, the next version of TM4J should include some utility methods for
setting up topic map providers from an XML configuration file.

Hope this helps,

Kal

On Thu, 2003-07-24 at 21:47, Rolf Guescini wrote:
> Hi, I am trying to make TM4J work with Tomcat, but I am having some problems..
> I have no problems running TM4j at commandline, using som of Khal Ahmeds 
> example java-files, but as soon as I try to use it with a jsp or a Bean 
> I get this error:
> 
> " TopicMapProviderException. Caused by: null"
> 
> I think that the problem might lie within these lines:  
> 
> 
> 	Properties backendProps = System.getProperties();
> 	String backendClassName 
> ="org.tm4j.topicmap.memory.TopicMapProviderFactoryImpl";
> ParseTopicMap(inputAddress, backendClassName, backendProps);
> 
> - and especially in the backendProps = System.getProperties() - bit..
> 
> has anybody tried this combination before ? 
> 
> I would be so greatful if anybody had any suggestions to what the problem 
> might be
> 
> Greetings Rolf Guescini
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> topicmapmail@infoloom.com
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-- 
Kal Ahmed, Techquila
Standards-based Information Management
e: kal@techquila.com
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p: +44 7968 529531