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.
>>>
>>>
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>>>
>>
>>
>> --
>> Olle Hallin
>> Senior Java Developer and Architect
>> olle.hal...@crisp.se
>> www.crisp.se
>>
>>
>
>
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