netstorelookupdispatchaction.java

基于servlet/xml开发的网上书店 下载有需写web.xml配置

package netstore.framework;

import javax.servlet.http.*;
import netstore.framework.util.IConstants;
import netstore.service.INetstoreService;
import netstore.service.INetstoreServiceFactory;
import org.apache.struts.actions.LookupDispatchAction;

abstract public class NetstoreLookupDispatchAction extends LookupDispatchAction {

  protected INetstoreService getNetstoreService(){
    INetstoreServiceFactory factory = (INetstoreServiceFactory)getApplicationObject( IConstants.SERVICE_FACTORY_KEY );
    INetstoreService service = null;
    try{
      service = factory.createService();
    }catch( Exception ex ){
      log.error( "Problem creating the Netstore Service", ex );
    }
    return service;
  }

  /**
   * Retrieve an object from the application scope by its name. This is
   * a convience method.
   */
  protected Object getApplicationObject(String attrName) {
    return servlet.getServletContext().getAttribute(attrName);
  }

  /**
   * Retrieve the SessionContainer for the user tier to the request.
   */
  protected SessionContainer getSessionContainer(HttpServletRequest request) {
    SessionContainer sessionContainer = (SessionContainer)getSessionObject(request, IConstants.SESSION_CONTAINER_KEY);

    System.out.println( sessionContainer );

    // Create a SessionContainer for the user if it doesn't exist already
    if(sessionContainer == null) {
      sessionContainer = new SessionContainer();
      sessionContainer.setLocale(request.getLocale());
      HttpSession session = request.getSession();
      session.setAttribute(IConstants.SESSION_CONTAINER_KEY, sessionContainer);
    }
    return sessionContainer;
  }

  /**
   * Retrieve a session object based on the request and the attribute name.
   */
 protected Object getSessionObject(HttpServletRequest req,
                                    String attrName) {
    Object sessionObj = null;
    HttpSession session = req.getSession(false);
    System.out.println( "Session was " + session );
    if ( session != null ){
       sessionObj = session.getAttribute(attrName);
    }
    return sessionObj;
  }
}