Article:		A Look at Commons Chain, Part 2
Subject:		Great introductory article
Date:		2005-03-10 14:44:43
From:		vijay172
Hi, This is a great introductory article on Chains.I have been curious about it but this article clearly explained the concept froma high level beautifully.Very well written with a great example to explain how composition works with Chains. Few things to be clarified- why use catalog-name of "auto-sales" within the command for "arrange-financing" while referring to a chain. Also,in CatalogLoader, does parsing the config file load up the catalog the first time round ? Vijay

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• Great introductory article
  2005-03-11 06:26:53  Bill Siggelkow | [View]
  
  
  Vijay,
  It sounds like your comments are regarding part 1, is that
  correct? Anyway, I used the catalog name "auto-sales" to
  illustrate how you can name catalogs. Chain allows you to
  have multiple catalogs in a config file like:
  

  
  
  <catalogs>
  
    <catalog name="auto-sales">
  
      <chain name="sell-vehicle">...
  
    </catalog>
  
    <catalog name="repair-services>
  
       ...
  
    </catalog>
  
  </catalogs>
  
  

  
  To answer your last question, yes, parsing the config file does load the catalog (behind the scenes it uses Digester rules to create objects from the XML).