saveregistration.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.action.*;
import org.apache.struts.webapp.example.*;
import javax.servlet.ServletException;

form = struts.getForm();
String act = form.getAction();
if (act == null) {
    act = "Create";
}
database = application.getAttribute(Constants.DATABASE_KEY);
if (log.isDebugEnabled()) {
    log.debug("SaveRegistrationAction:  Processing " + act +
              " act");
}

// Is there a currently logged on user (unless creating)?
user = session.getAttribute(Constants.USER_KEY);
if (!"Create".equals(act) && (user == null)) {
    if (log.isTraceEnabled()) {
        log.trace(" User is not logged on in session "
                  + session.getId());
    }
    struts.setForwardName("logon");
    return;
}
// Was this transact cancelled?
if (struts.action.isCancelled(request)) {
    if (log.isTraceEnabled()) {
        log.trace(" Transact '" + act +
                  "' was cancelled");
    }
    session.removeAttribute(Constants.SUBSCRIPTION_KEY);
    struts.setForwardName("success");
    return;
}

// Validate the transactal control token
errors = new ActionErrors();
if (log.isTraceEnabled()) {
    log.trace(" Checking transactal control token");
}
if (!struts.action.isTokenValid(request)) {
    errors.add(ActionErrors.GLOBAL_ERROR,
               new ActionError("error.transact.token"));
}
struts.action.resetToken(request);

// Validate the request parameters specified by the user
if (log.isTraceEnabled()) {
    log.trace(" Performing extra validations");
}
value = form.getUsername();
if (("Create".equals(act)) &&
        (database.findUser(value) != null)) {
        errors.add("username",
                   new ActionError("error.username.unique",
                                   form.getUsername()));
}
if ("Create".equals(act)) {
    value = form.password;
    if ((value == null) || (value.length() <1)) {
        errors.add("password",
                   new ActionError("error.password.required"));
    }
    value = form.password2;
    if ((value == null) || (value.length() < 1)) {
        errors.add("password2",
                   new ActionError("error.password2.required"));
    }
}

// Report any errors we have discovered back to the original form
if (!errors.isEmpty()) {
    struts.action.saveErrors(request, errors);
    struts.action.saveToken(request);
    struts.setForward(struts.mapping.getInputForward());
    return;
}
    
// Update the user's persistent profile information
try {
    if ("Create".equals(act)) {
        user = database.createUser(form.username);
    }
    oldPassword = user.password;
    PropertyUtils.copyProperties(user, form);
    if ((form.password == null) ||
        (form.password.length() < 1)) {
        user.setPassword(oldPassword);
    }
} catch (InvocationTargetException e) {
    Throwable t = e.getTargetException();
    if (t == null) {
        t = e;
    }
    log.error("Registration.populate", t);
    throw new RuntimeException("Registration.populate", t);
} catch (Throwable t) {
    log.error("Registration.populate", t);
    throw new RuntimeException("Subscription.populate", t);
}

try {
    database.save();
} catch (Exception e) {
    log.error("Database save", e);
}

// Log the user in if appropriate
if ("Create".equals(act)) {
    session.setAttribute(Constants.USER_KEY, user);
    if (log.isTraceEnabled()) {
        log.trace(" User '" + user.getUsername() +
                  "' logged on in session " + session.getId());
    }
}

// Remove the obsolete form bean
if (struts.mapping.getAttribute() != null) {
    if ("request".equals(struts.mapping.scope))
        request.removeAttribute(struts.mapping.attribute);
    else
        session.removeAttribute(struts.mapping.attribute);
}

// Forward control to the specified success URI
if (log.isTraceEnabled()) {
    log.trace(" Forwarding to success page");
}

struts.setForwardName("success");