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From Saibabu Vallurupalli <saibabu.vallurupa...@gmail.com>
Subject Re: Encryption and Decryption
Date Thu, 07 Jul 2011 21:56:54 GMT
Thank you Kevin. I will follow the documentation and give a try.

Thanks,
Sai

On Thu, Jul 7, 2011 at 5:28 PM, Kevin Sutter <kwsutter@gmail.com> wrote:

> The LifeCycle events are actually associated with the Entity class.  You
> have the option of defining your callbacks inline in your Entity class, or
> you can define a separate callback class and reference that in your Entity
> definition.  When your defined callback methods are invoked, you will have
> access to your Entity instance and then you can modify the fields as needed
> for encryption/decryption.
>
> The doc link provides more information and examples on how to define these
> callbacks.
>
> Kevin
>
> On Thu, Jul 7, 2011 at 3:20 PM, Saibabu Vallurupalli <
> saibabu.vallurupalli@gmail.com> wrote:
>
> > Hi Kevin,
> >
> > Thank you for the prompt response. I am sure the below workaround should
> > work for me.
> > Where do I need to add these LifeCycle callbacks? I have a model class in
> > James source for the field I am trying to Encrypt/Decrypt as shown below:
> >
> > *********
> > public class JPAMessage extends AbstractJPAMessage {
> >
> >    /** The value for the body field. Lazy loaded */
> >    /** We use a max length to represent 1gb data. Thats prolly overkill,
> > but who knows */
> >    @Basic(optional = false, fetch = FetchType.LAZY)
> >    @Column(name = "MAIL_BYTES", length = 1048576000, nullable = false)
> >    @Lob private byte[] *body*;
> >
> > // methods related to this class getter and creator...here...
> > }
> > ********
> >
> > "body" is the attribute I have to work with. So, Is this correct location
> > to
> > add these life cycle methods?
> >
> > Please advice.
> >
> > Thanks,
> > Sai
> >
> >
> > On Thu, Jul 7, 2011 at 2:56 PM, Kevin Sutter <kwsutter@gmail.com> wrote:
> >
> > > Hi Sai,
> > > JIRA openjpa-763 is a new feature request.  Nobody has found the time
> to
> > > dive into this request.  It probably is not that difficult to architect
> > and
> > > implement -- it's just a matter of time.
> > >
> > > As the text of the JIRA indicates, you could do a poor-man's
> > implementation
> > > by using the LifeCycle callbacks [1].  During the prePersist and
> > preUpdate
> > > callbacks, you could encrypt the contents of the mail message.  And,
> > during
> > > the postLoad callback, you could decrypt the contents of the mail
> > message.
> > > Would that work for your situation?
> > >
> > > Thanks,
> > > Kevin
> > >
> > > [1]
> > >
> > >
> >
> http://openjpa.apache.org/builds/latest/docs/manual/manual.html#jpa_overview_pc_callbacks
> > >
> > > On Thu, Jul 7, 2011 at 9:05 AM, Saibabu Vallurupalli <
> > > saibabu.vallurupalli@gmail.com> wrote:
> > >
> > > > Hi,
> > > >
> > > > I am using Apache James and we have a requirement to Encrypt and
> > Decrypt
> > > > the
> > > > email message body while storing to Database. In this process, I
> > started
> > > > exchanging emails with James development team and they have pointed
> me
> > to
> > > > the JIRA ticket# OPENJPA-763.
> > > > It will be really helpful if this issue can be fixed or please advise
> > me
> > > > with some suggestions on how to handle column level
> > > Encryption/Decryption.
> > > >
> > > > Thank you,
> > > > Sai
> > > >
> > >
> >
>

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