Re: commons-chain problems

Wed, 12 Jan 2005 08:28:03 -0800

I haven't used the ChainListener, but I'm wondering if you haven't caught up with the CatalogFactory API which came in shortly before the 1.0 release of Chain.

What code are you using which returns a null catalog? What I think you should be using, from what you wrote and the ChainListener javadoc, is

Catalog theCatalog = CatalogFactory.getCatalog("risks");

The ChainListener javadoc specifies that the org.apache.commons.chain.CONFIG_ATTR parameter is deprecated.

Joe

At 4:22 PM +0100 1/12/05, Pedro Salgado wrote: 
  I am trying to use commons-chain on my project but I have some problems
loading the chain-config.xml... does anyone setup a web application with
commons-chain (ChainListener)?

  If I specify org.apache.commons.chain.CONFIG_ATTR on my web.xml the
catalog is no longer null but it does not contain any commands.

  I have looked at the source code severall times and I don't know where is
the problem. Help?





I have appended a logger to commons-chain and commons-digester... here are
the results :

** commons-chain log

15:46:17,970 - INFO org.apache.commons.chain.web.ChainListener -
Initializing chain listener
15:46:18,050 - DEBUG org.apache.commons.chain.web.ChainResources - Loading
chain config resource 'chain-config.xml'


** commons-digester log

does not provide any information about commons-chain parse operation (?)


My configuration :

** chain-config.xml (that is being copied to the WEB-INF/classes)

<?xml version="1.0" encoding="UTF-8" ?>
<catalogs>

    <catalog name="risks">


        <command
            name="viewRiskTypes"
            className="package.commands.ViewRiskTypes"/>

    </catalog>

</catalogs>

** web.xml (Tomcat-5.0.27)

 <context-param>
    <param-name>org.apache.commons.chain.CONFIG_CLASS_RESOURCE</param-name>
    <param-value>chain-config.xml</param-value>
 </context-param>

 <listener>
   <listener-class>
     org.apache.commons.chain.web.ChainListener
   </listener-class>
 </listener>


Pedro Salgado


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