> Maybe I could work on something.
I am sure this community will welcome any effort to bridge Cayenne
with GWT. So if you have any ideas down this path, please share.
On Sep 21, 2008, at 5:09 PM, Chanda Fake wrote:
> Thanks all for your input. Learnt something and will pick it from
> here. I
> just thought maybe there could have been something similar to
> in the hibernate land. Maybe I could work on something.
> Good day
> On Wed, Sep 17, 2008 at 8:04 PM, Scott Anderson
>> This topic has been discussed in this group before, but I'll
>> the general concepts. You can't serialize persistent objects, period.
>> There are many reasons why, but I don't have time to list them all,
>> here are the three that are most important in my mind.
>> Reason #1:
>> In order for the GWT compiler to transform your CayenneDataObjects
>> in to
>> entire Cayenne library. I could list the reasons why you can't do
>> but I don't have time to write an essay right now, so save yourself
>> headache by taking me at my word when I say it won't work.
>> Reason #2:
>> The purpose of the server-side code is to enable validation and
>> authentication. You can expose un-verified, un-authenticated database
>> access to the client-side code without RPC. If you're not going to
>> validate or authenticate, don't bother introducing the proxy. Cayenne
>> will work just as well in a stand-alone application -- the Modeler
>> is a
>> good example of that.
>> Reason #3:
>> By writing the code to copy information out of beans and in to the
>> CayenneDataObjects, you will be forcing yourself to plug any
>> holes you would otherwise surely forget. Additionally, by using beans
>> targeted to the needs of your operations, the amount of data that is
>> required to go back and forth through the RPC tunnel will be
>> substantially lower.
>> If you were to serialize the CayenneDataObjects, which is impossible,
>> then for *every* operation you'd have to send the entire graph of the
>> object in question -- which is probably the entire database if you
>> reverse-map your relationships.
>> Hope this helps,
>> -----Original Message-----
>> From: Chanda Fake [mailto:chand..usakatimes.com]
>> Sent: Wednesday, September 17, 2008 1:07 AM
>> To: use..ayenne.apache.org
>> Subject: Using Cayenne in GWT wthout DTOs
>> I have seen from the mailing list that some people have used Cayenne
>> GWT successfully.What is the best way to expose Cayenne model to GWT
>> using DTOs which I consider as duplication of work. Am trying to
>> use my
>> Cayenne domain objects in GWT and running into some usual issues
>> thinking if there is a way to create a module with the offending
>> "CayenneDataObject" and then including it using <inherits ..>. What
>> others done.
>> Thanks in advance
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