[Chain] Trying to use ChainListener

[Mike Miller <Mi...@jda.com>]

Hi, I am just starting with the Commons Chain package and am trying to
use the ChainListener to load my small test catalog.  The listener fires
but does not put anything in the catalog.  I know if finds my resource
file, but the catalog is empty coming out of ChainListener.  Below is a
copy of my catalog.xml and web.xml.  Can someone please tell me what I
am missing?
 
Here's the snippet of code trying to execute the chain (alot this was
copied from the Chains cookbook doc)
 
 ServletContext servletContext =
request.getSession().getServletContext();  
 Catalog catalog = (Catalog) servletContext.getAttribute("catalog");
 Command command = catalog.getCommand(name);
 boolean stop = command.execute(context);

 
 
 
<?xml version="1.0" ?>
<catalog name="catalog">
 <chains>
   <chain name="login">
      <command name="Authentication"
className="util.servlet.command.AuthenticationCommand"/>
      <command name="ShowHome"
className="util.servlet.command.ShowHomeCommand"/>
      <command name="Mike"
className="util.servlet.command.MikeCommand"/>
   </chain>
 </chains>
</catalog>
 
 
<?xml version="1.0" encoding="ISO-8859-1"?>
 
<!DOCTYPE web-app
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
    "http://java.sun.com/dtd/web-app_2_3.dtd">
 
<web-app>
 
    <display-name>TestServlet</display-name>
    <description>Testing</description>
    
 <!-- Commons Chain listener to load catalogs  -->
 <context-param>
 
<param-name>org.apache.commons.chain.CONFIG_CLASS_RESOURCE</param-name>
   <param-value>resources/catalog.xml</param-value>
 </context-param>
 <context-param>
   <param-name>org.apache.commons.chain.CONFIG_ATTR</param-name>
   <param-value>catalog</param-value>
 </context-param>
 <listener>
 
<listener-class>org.apache.commons.chain.web.ChainListener</listener-cla
ss>
 </listener>
 
    <servlet>
        <servlet-name>TestServlet</servlet-name>
        <servlet-class>util.servlet.TestServlet</servlet-class>
    </servlet>
 
    <servlet-mapping>
        <servlet-name>TestServlet</servlet-name>
        <url-pattern>/test/*</url-pattern>
    </servlet-mapping>
 
</web-app>

 
 
Mike Miller
JDA Software Group, Inc.
7501 Ester's Blvd, Suite 100
Irving, Texas 75063
 

Re: [Chain] Trying to use ChainListener

[Howard Lin <xu...@gmail.com>]

Try remove CONFIG_ATTR parameter from web.xml and use CatalogFactory
to get the catalog.

Howard 


On Thu, 17 Mar 2005 15:16:55 -0600, Mike Miller <Mi...@jda.com> wrote:
> Hi, I am just starting with the Commons Chain package and am trying to
> use the ChainListener to load my small test catalog.  The listener fires
> but does not put anything in the catalog.  I know if finds my resource
> file, but the catalog is empty coming out of ChainListener.  Below is a
> copy of my catalog.xml and web.xml.  Can someone please tell me what I
> am missing?
> 
> Here's the snippet of code trying to execute the chain (alot this was
> copied from the Chains cookbook doc)
> 
>  ServletContext servletContext =
> request.getSession().getServletContext();
>  Catalog catalog = (Catalog) servletContext.getAttribute("catalog");
>  Command command = catalog.getCommand(name);
>  boolean stop = command.execute(context);
> 
> <?xml version="1.0" ?>
> <catalog name="catalog">
>  <chains>
>    <chain name="login">
>       <command name="Authentication"
> className="util.servlet.command.AuthenticationCommand"/>
>       <command name="ShowHome"
> className="util.servlet.command.ShowHomeCommand"/>
>       <command name="Mike"
> className="util.servlet.command.MikeCommand"/>
>    </chain>
>  </chains>
> </catalog>
> 
> <?xml version="1.0" encoding="ISO-8859-1"?>
> 
> <!DOCTYPE web-app
>     PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
>     "http://java.sun.com/dtd/web-app_2_3.dtd">
> 
> <web-app>
> 
>     <display-name>TestServlet</display-name>
>     <description>Testing</description>
> 
>  <!-- Commons Chain listener to load catalogs  -->
>  <context-param>
> 
> <param-name>org.apache.commons.chain.CONFIG_CLASS_RESOURCE</param-name>
>    <param-value>resources/catalog.xml</param-value>
>  </context-param>
>  <context-param>
>    <param-name>org.apache.commons.chain.CONFIG_ATTR</param-name>
>    <param-value>catalog</param-value>
>  </context-param>
>  <listener>
> 
> <listener-class>org.apache.commons.chain.web.ChainListener</listener-cla
> ss>
>  </listener>
> 
>     <servlet>
>         <servlet-name>TestServlet</servlet-name>
>         <servlet-class>util.servlet.TestServlet</servlet-class>
>     </servlet>
> 
>     <servlet-mapping>
>         <servlet-name>TestServlet</servlet-name>
>         <url-pattern>/test/*</url-pattern>
>     </servlet-mapping>
> 
> </web-app>
> 
> 
> Mike Miller
> JDA Software Group, Inc.
> 7501 Ester's Blvd, Suite 100
> Irving, Texas 75063
> 
>

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