Thanks for your quick response.
I've added in config : always-save-session this way :
<session-config
use-persistent-store="true"
always-save-session="true"
/>
and also in jsp :
session.setAttribute("cur",cur);//will save the data
when the color is changed.
The color is still not saved correctly. I prefer to use setAttribute to save
the session,
for performance reason, but neither methods work for me.
Maybe I miss something, but I really would like to understand this since we are
in the
process to publish a new application with load balancing.
Thanks
Scott Ferguson wrote:
>
> On Sep 18, 2006, at 6:25 AM, Riccardo Cohen wrote:
>
>> Hi
>> In my application, I found that persistance did now work always. The
>> first session info is
>> correcly stored, but not after a change.
>> So I made a little application that demonstrate that. And it appears
>> that a simple string
>> is correctly stored, while an object containing a hashtable is only
>> stored at creation time.
>> I use resin3.0.18 pro/sun jdk 1.5.0_06-b05 standard edition, and test
>> persistancy simply
>> by quitting and relaunching resin.
>
> That's normal, unless you add <always-save-session> to the
> <session-config> or call setAttribute each time the object changes.
>
> The issue is that Resin can't know that an internal value in a session
> object has changed unless it serializes it. Since the serialization is
> fairly slow, by default Resin only saves the session if it's told the
> session has changed, either by calling setAttribute or by having the
> <always-save-session> enabled.
>
> -- Scott
>>
>> Here is a sample coded storing simple strings in the session:
>>
>> ///////////DIRECT ACCESS//////////
>>
>> // get current session color
>> String session_color=(String)session.getAttribute("color");
>> if (session_color==null)
>> {
>> session_color="FFFFFF";
>> session.setAttribute("color",session_color);
>> }
>> else
>> System.out.println("GOT FROM SESSION");
>> // get parameter for user action
>> String newcol=request.getParameter("changecolor");
>> if (newcol!=null)
>> {
>> System.out.println("GOT FROM PARAM");
>> session_color=newcol;
>> session.setAttribute("color",session_color);
>> }
>>
>> In that case, the string session_color is correct after stop/start,
>> the color is well
>> memorized.
>>
>> Now an example using an object of mine :
>> public class myobj implements Serializable
>> {
>> Hashtable<String,String> hash;
>> public myobj()
>> {
>> hash=new Hashtable<String,String>();
>> }
>> public Hashtable<String,String> get_hash()
>> {
>> return(hash);
>> }
>> }
>> This object will be inserted in the session :
>> ///////////WITH HASH TABLE//////////
>>
>> <jsp:useBean id="cur" class="myobj" scope="session"/>
>> <%
>> // get current session color
>> String session_color=cur.get_hash().get("color");
>> if (session_color==null)
>> {
>> session_color="FFFFFF";
>> cur.get_hash().put("color",session_color);
>> }
>> else
>> System.out.println("GOT FROM SESSION");
>> // get parameter for user action
>> String newcol=request.getParameter("changecolor");
>> if (newcol!=null)
>> {
>> System.out.println("GOT FROM PARAM");
>> session_color=newcol;
>> cur.get_hash().put("color",session_color);
>> }
>>
>> Here the session_color is corretly save at first connection, but when
>> I change (in the
>> app) my color, and then stop/restart resin, the color saved is the
>> first one.
>>
>> Thanks for any help about this, I can provide full source code in a zip.
>>
>> --Très cordialement,
>>
>> Riccardo Cohen
>> ligne directe : 02-47-49-63-24
>> -------------------------------------------
>> Articque
>> http://www.articque.com
>> Moulin des Roches
>> 37230 Fondettes - France
>> tel : 02-47-49-90-49
>> fax : 02-47-49-91-49
>>
>> _______________________________________________
>> resin-interest mailing list
>> resin-interest@caucho.com
>> http://maillist.caucho.com/mailman/listinfo/resin-interest
>
>
--
Très cordialement,
Riccardo Cohen
ligne directe : 02-47-49-63-24
-------------------------------------------
Articque
http://www.articque.com
Moulin des Roches
37230 Fondettes - France
tel : 02-47-49-90-49
fax : 02-47-49-91-49
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