org.apache.struts.actions: public class: RedeployableActionServlet

org.apache.struts.actions
public class: RedeployableActionServlet [javadoc | source]

java.lang.Object
   org.apache.struts.action.ActionServlet
      org.apache.struts.actions.RedeployableActionServlet

WebLogic (at least v6 and v7) attempts to serialize the TilesRequestProcessor when re-deploying the Webapp in development mode. The TilesRequestProcessor is not serializable, and loses the Tiles definitions. This results in NullPointerException and/or NotSerializableException when using the app after automatic redeploy.

This bug report proposes a workaround for this problem, in the hope it will help others and maybe motivate an actual fix.

The attached class extends the Struts Action servlet and fixes the problem by reloading the Tiles definitions when they have disappeared.

For background discussion see http://issues.apache.org/bugzilla/show_bug.cgi?id=26322

version: $ - Rev: 54954 $ $Date: 2004-10-17 07:40:12 +0100 (Sun, 17 Oct 2004) $

since: 1.2.1 -

Method from org.apache.struts.actions.RedeployableActionServlet Summary:
getRequestProcessor

Methods from java.lang.Object:
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method from org.apache.struts.actions.RedeployableActionServlet Detail:
protected synchronized RequestProcessor getRequestProcessor(ModuleConfig config) throws ServletException { if (tileProcessor != null) { TilesRequestProcessor processor = (TilesRequestProcessor) super.getRequestProcessor(config); return processor; } // reset the request processor String requestProcessorKey = Globals.REQUEST_PROCESSOR_KEY + config.getPrefix(); getServletContext().removeAttribute(requestProcessorKey); // create a new request processor instance TilesRequestProcessor processor = (TilesRequestProcessor) super.getRequestProcessor(config); tileProcessor = processor; try { // reload Tiles defs DefinitionsFactory factory = processor.getDefinitionsFactory(); factory.init(factory.getConfig(), getServletContext()); // System.out.println("reloaded tiles-definitions"); } catch (DefinitionsFactoryException e) { e.printStackTrace(); } return processor; }

Method from org.apache.struts.actions.RedeployableActionServlet Detail:

 protected synchronized RequestProcessor getRequestProcessor(ModuleConfig config) throws ServletException {
        if (tileProcessor != null) {
            TilesRequestProcessor processor = (TilesRequestProcessor) super.getRequestProcessor(config);
            return processor;
        }
        // reset the request processor
        String requestProcessorKey = Globals.REQUEST_PROCESSOR_KEY +
                config.getPrefix();
        getServletContext().removeAttribute(requestProcessorKey);
        // create a new request processor instance
        TilesRequestProcessor processor = (TilesRequestProcessor) super.getRequestProcessor(config);
        tileProcessor = processor;
        try {
            // reload Tiles defs
            DefinitionsFactory factory = processor.getDefinitionsFactory();
            factory.init(factory.getConfig(), getServletContext());
            // System.out.println("reloaded tiles-definitions");
        } catch (DefinitionsFactoryException e) {
            e.printStackTrace();
        }
        return processor;
}