Comments on Stringbuffer.com: HTTP-sessions and the Google App Engine/J - some i...

make sure that every object written to the session...

2010-12-29T22:26:54.641+01:00

make sure that every object written to the session implements java.io.Serializable.

Otherwise it will work in dev mode but fail in prod.

I’m currently writing a series of blogs about GEA ...

2010-01-31T02:08:51.490+01:00

I’m currently writing a series of blogs about GEA in combination with sessions. I think some of the questions above will be answers with my experiences. Take a look at my blog at http://jvdkamp.wordpress.com/

Hi everyone! I have problems with session when i d...

2010-01-30T06:57:05.597+01:00

Hi everyone!
I have problems with session when i deploy my app. But locally everything works fine. It looks like that I can't set new session. I did everything as u wrote above, enabled session in appengine-web.xml ...
Suggestions ?
thank u

Hi I also have a problem with session handling. Wh...

2009-10-07T11:35:49.388+02:00

Hi I also have a problem with session handling. When GAE tries to serialize the session i got an Exception

java.io.NotSerializableException:
com.google.apphosting.runtime.jetty.SessionManager

As i understand this message it says: The sessions referes to a SessionManager which does not implements Serializable. But the implementation is from google (The force i not with me).

I tried to get the error on the local system and serializing the session into a byte array after each "doPost" in my servlet. It also has a problem that the session manager is not serializeable. But if i step into a debugger and change the references to SessionManager to null, than serialization works. So it is not a problem of my objects.

Any help?

Hi I am also messing with the issue. I have set an...

2009-09-22T22:15:18.794+02:00

Hi I am also messing with the issue. I have set an attribute in session but cant able to get. And got NullPointerException on it. I have also enabled it in web-appengine.xml.

Any help or idea... :(

I have a problem with HttpSession. It doesn't ...

2009-08-10T16:56:42.180+02:00

I have a problem with HttpSession. It doesn't work correctly with GAE. I use classiq methods to store and retrieve objects sessions.
I have activate the management inside web-appengine.xml with sessions-enabled tag

When i want use objects in JSP, theses objects are null and i have an exception

Is it a big bug of GAE version Java OR NOT ?

Has anybody a snippet to show how to store somethi...

2009-05-24T20:57:05.214+02:00

Has anybody a snippet to show how to store something in session (in request N) and retreive it from session (in request N+1)
My problem is that i want do this in a Grails app i deploy on GAE..and should forget session['name']=myObj
Thanks in advance

Thanks for your answer! It helps me a lot, and it'...

2009-04-20T08:15:00.000+02:00

Thanks for your answer! It helps me a lot, and it's good to know, that what's happening behind the scenes :)

Hi Bálint! Thanks for your comment, and glad you f...

2009-04-19T22:10:00.000+02:00

Hi Bálint! Thanks for your comment, and glad you found the blog!

Yes, you should be able to use the session just as you're used to from a "normal" servlet container. You should be able to get and set session attributes just as you're used to!

The heavy lifting -- distributing the sessions among all JVM:s serving the requests to your app -- is done behind the scenes.

Hi! Thanks for this, I'm trying to do something b...

2009-04-19T20:58:00.000+02:00

Hi!

Thanks for this, I'm trying to do something big in GAE/J, and I was looking for infos about HttpSession implementation in GAE (on the docs it was only 1 paragraph, it's not enough for me :))

So in general: you don't have to worry about anything? just putting and getting attributes? Or what is the level I need to worry about (But it's good to know that in the background, google works hard)