In 5.0.17+ you will get a runtime exception if you try to initialize a page member in the declaration.
At least for me it works that way. Olle 2008/12/15 kawes <rafal.kawe...@gmail.com> > > Ok found an answer to my second question, > some info is provided here: > http://tapestry.apache.org/tapestry5/tapestry-core/guide/rendering.html > > but still would be happy if you could answer to my first question. > > cheers > > > kawes wrote: > > > > Olle, > > > > thanks a lot. I knew what was wrong but had no idea how to deal with > that. > > I am gonna check it out at home 'cause now I am at work. > > > > But I have some questions to the resolve you suggetsed: > > - Starting with 5.0.17, it is forbidden to have initial values on page > > - what does it mean it is forbidden? I did not notice any repoerts during > > runtime and no during compilantion neither. > > > > - what is setupRender() method? it will be called automatically ? > > > > thanks again > > > > > > Olle Hallin wrote: > >> > >> What happens is that TeacherMode is mutable, and hence leaks state > >> between > >> different users. You are *not* given a fresh instance on each request. > >> Instead, instances are pooled and reused. > >> > >> (Starting with 5.0.17, it is forbidden to have initial values on page > >> member variables in order to prevent bugs like this.) > >> > >> One way to handle this situation is: > >> > >> *...@persist > >> *private TeacherMode teacherMode; > >> > >> public void *setupRender()* { > >> if (teacherMode == null) { > >> teacherMode = new TeacherMode(); // This will be a private instance > >> per > >> session > >> } > >> } > >> > >> HTH, > >> > >> Olle > >> > >> > >> 2008/12/15 kawes <rafal.kawe...@gmail.com> > >> > >>> > >>> Hi Jonathan, > >>> > >>> thanks for your quick response. > >>> As you asked I uploaded classes I hit the problem in. > >>> > >>> Small description: One of my sub-application is Teacher (should be able > >>> to > >>> provide a word in foreign language and accept user's answer checks > >>> wheather > >>> it is correct) > >>> > >>> When user logs in, clicks teacher link is redirected to AvailabaleSets > >>> (which is wrapped by TeacherBorder). > >>> > >>> T5.zip file uploaded and it contains: > >>> - Border.java > >>> - Border.tml (pagelinks to all stuff provided by my app) > >>> > >>> - TeacherBorder.java > >>> - TeacherBorder.tml (contains all links to navigate my Teacher > >>> sub-application - i.e. TeacherMode - resposnible for 'asking question', > >>> registering results etc) > >>> > >>> - AvailableSets.java > >>> - AvailableSets.tml (displays available sets containg words) > >>> > >>> - TeacherModePage1.java > >>> - TeacherModePage1.tml (lets user to choose the word's set and decide > >>> about > >>> the questioning mode (mingled or the sequence of words had been added > to > >>> the > >>> set) ) > >>> > >>> - TeacherModePage2.java > >>> - TeacherModePage2.tml (displays questions and lets to type in > answers) > >>> > >>> TeacherModePage1.java contains the following line: > >>> private TeacherMode teacherMode = new TeacherMode(); > >>> > >>> I belived that when new page would be displayed (whe user clicks > >>> TeacherMode > >>> in TeacherBorder) a brand new TeacherMode instance would be returned > but > >>> is > >>> not. And is not because all the classes are already instantiated and T5 > >>> gives them back to the user for efficiency. > >>> > >>> Please keep in mind this is just the beggining of the work, so not > >>> everything is like it should be from architectural point of view (i.e. > >>> @Persist will be replaced by onPassvate and onActivate). I just wanted > >>> to > >>> see how it works. > >>> > >>> If any more details are reqiured let me know. > >>> > >>> Thanks in advance http://www.nabble.com/file/p21009484/T5.zip T5.zip > >>> -- > >>> View this message in context: > >>> > http://www.nabble.com/Layout-Border-component-problem-tp21004400p21009484.html > >>> Sent from the Tapestry - User mailing list archive at Nabble.com. > >>> > >>> > >>> --------------------------------------------------------------------- > >>> To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > >>> For additional commands, e-mail: users-h...@tapestry.apache.org > >>> > >>> > >> > >> > >> -- > >> Olle Hallin > >> Senior Java Developer and Architect > >> olle.hal...@crisp.se > >> www.crisp.se > >> > >> > > > > > > -- > View this message in context: > http://www.nabble.com/Layout-Border-component-problem-tp21004400p21010909.html > Sent from the Tapestry - User mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: users-unsubscr...@tapestry.apache.org > For additional commands, e-mail: users-h...@tapestry.apache.org > > -- Olle Hallin Senior Java Developer and Architect olle.hal...@crisp.se www.crisp.se
