editsubscription.gv

struts框架的script版本． 用于学习strust框架

import java.lang.reflect.InvocationTargetException;
import org.apache.commons.beanutils.PropertyUtils;
import org.apache.struts.webapp.example.*;
import javax.servlet.ServletException;

act = request.getParameter("action");
if (act == null) {
    act = "Create";
}

host = request.getParameter("host");
if (log.isDebugEnabled()) {
    log.debug("EditSubscriptionAction:  Processing " + act +
              " action");
}

// Is there a currently logged on user?
user = (User) session.getAttribute(Constants.USER_KEY);
if (user == null) {
    if (log.isTraceEnabled()) {
        log.trace(" User is not logged on in session "
                  + session.getId());
    }
    struts.setForwardName("logon");
    return;
}
// Identify the relevant subscription
subscription =
        user.findSubscription(request.getParameter("host"));
if ((subscription == null) && !act.equals("Create")) {
    if (log.isTraceEnabled()) {
        log.trace(" No subscription for user " +
                  user.getUsername() + " and host " + host);
    }
    struts.setForwardName("failure");
    return;
}

if (subscription != null) {
    session.setAttribute(Constants.SUBSCRIPTION_KEY, subscription);
}

form = struts.form;
form.setAction(act);
if (!act.equals("Create")) {
    if (log.isTraceEnabled()) {
        log.trace(" Populating form from " + subscription);
    }
    try {
        PropertyUtils.copyProperties(form, subscription);
        form.setAction(act);
    } catch (InvocationTargetException e) {
        Throwable t = e.getTargetException();
        if (t == null)
            t = e;
        log.error("SubscriptionForm.populate", t);
        throw new ServletException("SubscriptionForm.populate", t);
    } catch (Throwable t) {
        log.error("SubscriptionForm.populate", t);
        throw new ServletException("SubscriptionForm.populate", t);
    }
}

// Forward control to the edit subscription page
if (log.isTraceEnabled()) {
    log.trace(" Forwarding to 'success' page");
}

struts.setForwardName("success");