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Posted to user@struts.apache.org by Anjib Mulepati <an...@hotmail.com> on 2011/11/18 20:54:45 UTC

Servlet init() equivalent in Struts 1.3.8

Hi All,

I am trying to put some database configuration code in the Struts 
application. This is the code for loading context parameter, configure 
database parameter and locate the service.

Usually we put this code in init() method of servlet but I am confuse 
where I can put this piece of code in Struts. This is basically one time 
thing.

Thanks,
Anjib




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RE: Servlet init() equivalent in Struts 1.3.8

Posted by "Givler, Eric" <eg...@pa.gov>.

You could create these objects at startup via a Listener (defined in web.xml) and available as part of the ServletContext as attributes.

You could also wire them together via Spring and gain access via Spring's WebApplicationContext (I think that's what it's called).

Eric

-----Original Message-----
From: Anjib Mulepati [mailto:anjibcs@hotmail.com] 
Sent: Friday, November 18, 2011 2:55 PM
To: Struts Users Mailing List
Subject: Servlet init() equivalent in Struts 1.3.8

Hi All,

I am trying to put some database configuration code in the Struts 
application. This is the code for loading context parameter, configure 
database parameter and locate the service.

Usually we put this code in init() method of servlet but I am confuse 
where I can put this piece of code in Struts. This is basically one time 
thing.

Thanks,
Anjib

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Re: Servlet init() equivalent in Struts 1.3.8

Posted by Johannes Geppert <jo...@apache.org>.

You can use your own Struts2 FilterDispatcher to solve this.

Like this Example which is loading Configs via an SpringDAO and put it into
the Application Scope:

public class FilterDispatcher extends StrutsPrepareAndExecuteFilter {
  private static final Log log = LogFactory.getLog(FilterDispatcher.class);
  private ConfigDAO        configDAO;

  public void init(FilterConfig filterConfig) throws ServletException
  {
    super.init(filterConfig);
    log.info("Init Application Configuration");
    XmlWebApplicationContext xwac = (XmlWebApplicationContext)
filterConfig.getServletContext().getAttribute("org.springframework.web.context.WebApplicationContext.ROOT");
    configDAO = ConfigDAO.getFromApplicationContext(xwac);
    List<Config> configs = configDAO.findApplicationConfig();
    for (Config c : configs)
    {
      filterConfig.getServletContext().setAttribute(c.getName(),
c.getValue());
    }
  }
}

Johannes


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