Newbei question: Page navigation

[zwu_ca]

I have a problem like this: If user opens a page: http://my/link.seam?a=3 and if user has not logged on, it will redirect the link to http://my/home.seam. After user enters correct credentials and hits "Login" button, the page should go back to http://my/link.seam?a=3. How this logic can be implemented is Seam?

Any tips will be much appreciated.

[hstang]

http://docs.jboss.com/seam/1.2.1.GA/reference/en/html/security.html#d0e6305

[zwu_ca]

Thanks a lot: Almost worked -- how ever it lost the request string "?a=15" in the original url. Any more tip?

[gavin.king]

Declare the parameter as a seam page parameter.

[zwu_ca]

Thanks for help -- this has been driving me crazy (more than 12 hours have been spent -- a newbie in Seam).

I think I did do this: Could you look at what's wrong with the navigation (I also include the related Java code). Your help will be much appreciated.





<page view-id="/home.xhtml">


<redirect view-id="/itemlist.xhtml"/>




<page view-id="/itemlist.xhtml" login-required="true" >

<navigation from-action="#{hotelBooking.cancel}">
<redirect view-id="/main.xhtml"/>




import javax.ejb.*;
/**
*
* @author WuZX
*/
@Local
public interface Itemlist
{
UploadedData getData();
String getMe();
void setMe(String me);
/*
public void setDamn(String id);
public String getDamn();
*/
public void destroy();

}


/**
*
* @author WuZX
*/
import static org.jboss.seam.ScopeType.STATELESS;

import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.annotations.Factory;
import org.jboss.seam.annotations.RequestParameter;
import org.jboss.seam.annotations.Create;
import org.jboss.seam.annotations.Destroy;
import javax.ejb.Remove;
import javax.ejb.*;

import org.jboss.logging.Logger;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;


@Stateful
@Name("itemlist")

//@Scope(STATELESS)
public class ItemlistAction implements Itemlist {

//@In String id;

// private UploadedData uploadedData;

@PersistenceContext
private EntityManager em;


@RequestParameter("id")

private String id;

private static final Logger log = Logger.getLogger(ItemlistAction.class);
static
{
log.info("loading?****************");
}

/*public String getData()
{

return "data" + id;
}*/
//@Out
//@Factory("uploadedData")
public UploadedData getData()
{
log.info("get here" + id);

if (id == null )
{
//UploadedData uploadedData = new UploadedData();
//uploadedData.setTesting("testing");
return null;
}
return em.find(UploadedData.class, new Long(id));

}

public String getMe()
{
return id;
}

public void setMe(String me)
{
id = me;
}
public int getDataID()
{
return 3;
/* try
{
if (id != null)
return Integer.parseInt(id);
}
catch(Exception e)
{

}
return 0;
*/
}

@Destroy @Remove
public void destroy() {}
}

[zwu_ca]

Sorry I didn't put the

tag, which caused the text uncomprensive.
Here I tried. The java code is in previous posting.


<page view-id="/home.xhtml">
 <navigation>
 <rule if="#{identity.loggedIn}">
 <redirect view-id="/itemlist.xhtml"/>
 </rule>
 </navigation>

 </page>
 <page view-id="/itemlist.xhtml" login-required="true" >
 <param name="id" value="#{itemlist.me}" />
 <navigation from-action="#{hotelBooking.cancel}">
 <redirect view-id="/main.xhtml"/>
 </navigation>
 </page>

[gavin.king]

I don't see any page parameter declaration in pages.xml.

http://docs.jboss.com/seam/1.2.1.GA/reference/en/html/events.html#d0e3803

[gavin.king]

There needs to be

<param name="a" value="...."/>

[zwu_ca]

Thanks again for the help: I didn't get what you meant with

<param name="a" value="...."/>

The param I had is 'id' and I had the line:

<param name="id" value="#{itemlist.me}" />

Did I put the line in a wrong place?

[gavin.king]

In your original post, you typed "a". Which is it?

[zwu_ca]

First I am so thankful you are so patient and so willing to help -- very rarely.

I don't see 'a' anywhere in the original code posting. I forgot to use the 'code' html tag in the original code. There might be some confusion there (you might have different views from mine?). I will try to post the code again here (hopefully this time it can be resolved ).

 <page view-id="/home.xhtml">

 <navigation>
 <rule if="#{identity.loggedIn}">
 <redirect view-id="/itemlist.xhtml"/>
 </rule>
 </navigation>

 </page>
 <page view-id="/itemlist.xhtml" login-required="true" >
 <param name="id" value="#{itemlist.me}" />
 <navigation from-action="#{hotelBooking.cancel}">
 <redirect view-id="/main.xhtml"/>
 </navigation>
 </page>

import javax.ejb.*;
/**
 *
 * @author WuZX
 */
@Local
public interface Itemlist
{
 UploadedData getData();
 String getMe();
 void setMe(String me);
 /*
 public void setDamn(String id);
 public String getDamn();
 */
 public void destroy();

}



/**
 *
 * @author WuZX
 */
import static org.jboss.seam.ScopeType.STATELESS;

import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.annotations.Out;
import org.jboss.seam.annotations.Factory;
import org.jboss.seam.annotations.RequestParameter;
import org.jboss.seam.annotations.Create;
import org.jboss.seam.annotations.Destroy;
import org.jboss.seam.annotations.Scope;
import javax.ejb.Remove;
import javax.ejb.*;
import static org.jboss.seam.ScopeType.*;

import org.jboss.logging.Logger;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;


@Stateful
@Name("itemlist")
@Scope(EVENT)
public class ItemlistAction implements Itemlist {

 //@In String id;

 // private UploadedData uploadedData;

 @PersistenceContext
 private EntityManager em;


 @RequestParameter("id")
 private String me;

 private static final Logger log = Logger.getLogger(ItemlistAction.class);
 static
 {
 log.info("loading?****************");
 }

 /*public String getData()
 {

 return "data" + id;
 }*/
 //@Out
 //@Factory("uploadedData")
 public UploadedData getData()
 {
 log.info("get here" + me);

 if (me == null )
 {
 //UploadedData uploadedData = new UploadedData();
 //uploadedData.setTesting("testing");
 return null;
 }
 return em.find(UploadedData.class, new Long(me));

 }

 public String getMe()
 {
 log.info("===============get me " + me);

 return me;
 }

 public void setMe(String me)
 {
 log.info("================= set me here" + me);

 this.me = me;
 }
 public int getDataID()
 {
 return 3;
 /* try
 {
 if (id != null)
 return Integer.parseInt(id);
 }
 catch(Exception e)
 {

 }
 return 0;
 */
 }

 @Destroy @Remove
 public void destroy() {}
}

[gavin.king]

You typed:

If user opens a page: http://my/link.seam?a=3 and if user has not logged on, it will redirect the link to http://my/home.seam. After user enters correct credentials and hits "Login" button, the page should go back to http://my/link.seam?a=3. How this logic can be implemented is Seam?

Almost worked -- how ever it lost the request string "?a=15" in the original url.

Well, I don't see the following in your pages.xml:

<event type="org.jboss.seam.notLoggedIn">
 <action expression="#{redirect.captureCurrentView}"/>
</event>

<event type="org.jboss.seam.postAuthenticate">
 <action expression="#{redirect.returnToCapturedView}"/>
</event>

[zwu_ca]

As I said, it did go back to the pag but with Query String cut off. I wanted the origignal link "http://my/itemlist.seam?id=20" instead of "http://my/itemlist.seam?cid=3". PLEASE NOTE the 'cid' is the generic Query Parameter, not my 'id'.

If I hadn't the two lines, it would have gone back at all.


This is the complete file:

<!DOCTYPE pages PUBLIC
 "-//JBoss/Seam Pages Configuration DTD 1.2//EN"
 "http://jboss.com/products/seam/pages-1.2.dtd">

<pages no-conversation-view-id="/main.xhtml"
 login-view-id="/home.xhtml">


 <page view-id="/uploadResponse.xhtml">
 <param name="pid" value="#{personDao.id}"
 converterId="javax.faces.Long"/>
 </page>
 <page view-id="/register.xhtml">

 <action if="#{validation.failed}"
 execute="#{register.invalid}"/>

 <navigation>
 <rule if="#{register.registered}">
 <redirect view-id="/home.xhtml"/>
 </rule>
 </navigation>

 </page>

 <page view-id="/home.xhtml">

 <navigation>
 <rule if="#{identity.loggedIn}">
 <redirect view-id="/itemlist.xhtml"/>
 </rule>
 </navigation>

 </page>
 <page view-id="/itemlist.xhtml" login-required="true" >
 <param name="id" value="#{itemlist.me}" />
 <navigation from-action="#{hotelBooking.cancel}">
 <redirect view-id="/main.xhtml"/>
 </navigation>
 </page>
 <page view-id="/password.xhtml"
 login-required="true">

 <navigation>
 <rule if="#{changePassword.changed}">
 <redirect view-id="/main.xhtml"/>
 </rule>
 </navigation>

 </page>

 <page view-id="/main.xhtml"
 login-required="true">

 <navigation from-action="#{hotelBooking.selectHotel(hot)}">
 <redirect view-id="/hotel.xhtml"/>
 </navigation>

 <navigation from-action="#{bookingList.cancel}">
 <redirect/>
 </navigation>

 </page>

 <page view-id="/hotel.xhtml">

 <description>View hotel: #{hotel.name}</description>

 <navigation from-action="#{hotelBooking.bookHotel}">
 <redirect view-id="/book.xhtml"/>
 </navigation>

 </page>

 <page view-id="/book.xhtml">

 <description>Book hotel: #{hotel.name}</description>

 <navigation from-action="#{hotelBooking.setBookingDetails}">
 <rule if="#{hotelBooking.bookingValid}">
 <redirect view-id="/confirm.xhtml"/>
 </rule>
 </navigation>

 </page>

 <page view-id="/confirm.xhtml">

 <description>Confirm booking: #{booking.description}</description>

 <navigation from-action="#{hotelBooking.confirm}">
 <redirect view-id="/main.xhtml"/>
 </navigation>

 </page>

 <page view-id="*">

 <navigation from-action="#{identity.logout}">
 <redirect view-id="/home.xhtml"/>
 </navigation>

 <navigation from-action="#{hotelBooking.cancel}">
 <redirect view-id="/main.xhtml"/>
 </navigation>

 </page>


 <event type="org.jboss.seam.notLoggedIn">
 <action expression="#{redirect.captureCurrentView}"/>
 </event>

<event type="org.jboss.seam.postAuthenticate">
 <action expression="#{redirect.returnToCapturedView}"/>
</event>

 <exception class="org.jboss.seam.security.NotLoggedInException">
 <redirect view-id="/home.xhtml">
 <message severity="warn">You must be logged in to use this feature</message>
 </redirect>
 </exception>

</pages>

[zwu_ca]

Oh, you meant the 'a' in the very first posting. That's what I wanted to get an idea how this could be done. Then I tried my actual things and then they didn't work as I wanted, then I went to implementation details : When you talked about 'a' and I forgot the 'a' in the very first posting. But this still has not been resolved. I reluctantly (because you had lots of time with me already) asked you to help again.

[zwu_ca]

Got it now -- I don't think it was not so nice : several internal redirections may have happens (since I can see the get and set methods called several times). In order not to lost the value of my bean variable, I have to let it not be set if the Query variable is null.

I think this part of the implementation of SEAM is problemlic, or at least not very nice.