Re: Conditions when PersistenceState gets "hollow"

From: Nishant Neeraj (nishant.has.a.questio..mail.com)
Date: Thu Apr 01 2010 - 15:27:59 EDT

  • Next message: Nishant Neeraj: "Re: Conditions when PersistenceState gets "hollow""

    Thanks for the reply.
    Yes, Wicket does serialize/de-serialize objects to/from session-store... so,
    do I need to explicitly inflate the objects or there is a way to make sure
    deserialization occurs properly?

    Thanks
    Nishant

    On Fri, Apr 2, 2010 at 12:38 AM, Andrus Adamchik <andru..bjectstyle.org>wrote:

    > I haven't used Wicket, but is there (de)serialization of objects involved
    > when rendering a form and then submitting it back? This might result in
    > turning an object to a hollow state. The last observation may be due to the
    > object deserialized outside of its context...
    >
    > Andrus
    >
    >
    > On Apr 1, 2010, at 9:28 PM, Nishant Neeraj wrote:
    >
    > Also, when I "touch" (call getXXX) on the object it return empty string.
    >>
    >> On Thu, Apr 1, 2010 at 11:29 PM, Nishant Neeraj <nishant....mail.com
    >> >wrote:
    >>
    >> Hi,
    >>>
    >>> I am using Cayenne with Wicket.
    >>>
    >>> There are situations when I see object's persistence state HOLLOW.
    >>> Specially, when I have committed something on a page, say by form
    >>> submission, .... then clicked browser back button to come back to the
    >>> same
    >>> page and try to resubmit the form.
    >>>
    >>> The problem is, when resubmitting, instead of over-writing the same
    >>> object.. it is trying to insert it in DB.. but since it has unique key
    >>> that
    >>> conflicts which previous commit, MySQL throws an exception.
    >>>
    >>> I wanted to know what are the situations when a data object is assigned
    >>> HOLLOW?
    >>>
    >>>
    >>> Thanks
    >>> Nishant
    >>>
    >>>
    >>>
    >>>
    >



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