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Posted to dev@openjpa.apache.org by Umashanthi Pavalanathan <um...@gmail.com> on 2011/03/26 14:29:03 UTC
Re: Ideas for Google Summer of Code 2011
On Sat, Feb 5, 2011 at 9:10 PM, Umashanthi Pavalanathan <
umashanthip@gmail.com> wrote:
> Hi Jeremy,
>
> On Thu, Feb 3, 2011 at 8:46 PM, Jeremy Bauer <te...@gmail.com> wrote:
>
>> Hi Umashanthi,
>>
>> >Further I went through the Javadocs of OpenJPA annotations you mentioned
>> and
>> >the JPA's XML-ORM XML scheme. I understood that the requirement is to
>> create
>> >an XML schema for the custom annotations of OpenJPA, similar to the one
>> >provided for default annotations of JPA, mentioned in section 12.3 of the
>> >spec. Did I get it right?
>>
>> You got it right. One part of the effort is to create a schema similar to
>> the orm schema defined in 12.3 of the 2.0 spec. I have a few ideas as to
>> the
>> different approaches that one could take, but I'll let you think on it and
>> come up with ideas. I don't want to hinder your creativity. :-) But,
>> I'll
>> be happy to provide suggestions if you'd like.
>>
>
> Hope I can come up with some ideas when I proceed with the findings...
>
>
>>
>> >Currently I'm continuing with the spec and samples. I would like to read
>> >more details about the custom annotations of OpenJPA. It'll be great if
>> you
>> >can provide any related resources, if available.
>>
>> Unfortunately, I've found that resources for the extensions are lacking
>> JavaDoc, documentation, and in some cases, example usage/testing. You may
>> find some annotations within OpenJPA documentation[1]. I've found that
>> the
>> best resource is our jUnits. Search for the annotation and then track the
>> persistent class where it is used back to the test case(s). As you go
>> through this exercise, updates to the annotation JavaDoc would be hugely
>> valuable as well.
>>
>
> Thanks for pointing out the user manual; it has good descriptions for some
> annotations. I started with the approach you mentioned and started to
> document resources (Java docs, user manual, code usages) related to each
> custom annotation. You can find the published version of the GoogleDoc[1].
> I'll be updating this doc for all annotations and will look at the usages in
> code, to find any possible additions to the JavaDoc.
>
My apologies; I was not active for a while due to my University
examinations. Since I'm done with that I've resumed this effort.
I've done with tabulating all the annotations extensions to the GoogeDoc.
Now I will start with understanding each annotation extension using the
JavaDoc, user manual and usages in the source code; as Jeremy suggested I
will also add more descriptions to the JavaDoc if there's any lack of
content.
Since the Google Summer of Code application period is going to start soon, I
would like to know the process for marking this as a GSoC project. I noticed
that many other ASF projects are following last year's method of adding
project ideas to the JIRA and tagging it with 'gsoc2011'. Is it the same
with OpenJPA?
Jeremy, I hope you will be able to mentor this project.
Is there any other procedures to be followed along with preparing the
project proposal? I would like to hear the thoughts of the community
regarding this.
Thanks in advance,
~Umashanthi
>
>
> [1]
> https://docs.google.com/document/pub?id=1ABqZlq5qwGORtbfin9_3h9FiymF506g-8IprJGwH9sY
>
> Thanks,
> ~Umashanthi
>
>
>
>>
>> -Jeremy
>>
>> [1] http://openjpa.apache.org/builds/latest/docs/manual/manual.pdf
>>
>> On Tue, Feb 1, 2011 at 4:25 PM, Umashanthi Pavalanathan <
>> umashanthip@gmail.com> wrote:
>>
>> > Hi Jeremy,
>> >
>> > On Mon, Jan 31, 2011 at 10:39 PM, Jeremy Bauer <te...@gmail.com>
>> > wrote:
>> >
>> > > Hi Umashanthi,
>> > >
>> > > Thanks for your interest in OpenJPA. I'm glad you were able to get
>> the
>> > > code
>> > > and get it building. Besides reading the spec, the OpenJPA quick
>> start
>> > > guide[1] (especially the examples) is a good place to start.
>> > >
>> > > Here is one SoC project idea...
>> > >
>> > > The JPA specification includes many annotations for the specification
>> of
>> > > metadata and mapping information within Java classes. In addition,
>> the
>> > > spec
>> > > provides a means to supply the same information within XML
>> configuration
>> > > files (orm.xml). One primary benefit of XML config files is it allows
>> > > modification of the ORM information without needing to recompile the
>> > source
>> > > code.
>> > >
>> >
>> > I went through the sections on annotations of the JPA 2.0 spec (
>> Chapters
>> > 10,11&12) and got some understanding of the XML O/R mapping descriptors
>> and
>> > their use. As it is mentioned, the mapping descriptor serves as both an
>> > alternative to and an overrid-
>> > ing mechanism for Java language metadata annotations.
>> >
>> >
>> > >
>> > > OpenJPA has many custom metadata and mapping annotations that can be
>> used
>> > > to
>> > > provided functionality beyond the JPA specification. However, these
>> > > extensions are available only through annotations. There is currently
>> no
>> > > means to specify the metadata or mapping extensions via XML. We've
>> had
>> > > several requests for this capability, but it hasn't seen much/any
>> > activity.
>> > >
>> >
>> > Further I went through the Javadocs of OpenJPA annotations you mentioned
>> > and
>> > the JPA's XML-ORM XML scheme. I understood that the requirement is to
>> > create
>> > an XML schema for the custom annotations of OpenJPA, similar to the one
>> > provided for default annotations of JPA, mentioned in section 12.3 of
>> the
>> > spec. Did I get it right?
>> >
>> >
>> >
>> > >
>> > > In part, this effort would include:
>> > >
>> > > 1) Understanding OpenJPA's annotatation extensions.
>> > > 2) Determining which annotations make sense to provide in XML
>> > configuration
>> > > 3) Designing a schema for the XML-based configuration file
>> > > (openjpa-orm.xml?)
>> > > 4) Creating metadata and mapping parsers for the new XML mapping file
>> > > 5) Wiring the new parsers into the existing code path.
>> > >
>> >
>> > I understood the above steps more after going through the spec &
>> resources.
>> >
>> > Currently I'm continuing with the spec and samples. I would like to read
>> > more details about the custom annotations of OpenJPA. It'll be great if
>> you
>> > can provide any related resources, if available.
>> >
>> >
>> > Thanks,
>> > ~Umashanthi
>> >
>> >
>> > >
>> > > I think this would make a good SoC project because:
>> > >
>> > > 1) The work is well defined and fairly self contained.
>> > > 2) It would be a good experience in adding additional capabilities to
>> a
>> > > mature piece of software.
>> > > 3) It wouldn't require spending much/any time trying to understand
>> > OpenJPA
>> > > internals - which can be very time consuming. Instead, you'll be
>> > learning
>> > > about JPA and OpenJPA's powerful extensions - especially by learning
>> what
>> > > the extensions do and writing jUnits to test the capability via XML
>> > > mappings.
>> > > 4) This activity can be ongoing. Not all extensions need to be
>> > immediately
>> > > available. Once the base framework is available, incomplete
>> extensions
>> > can
>> > > be added in the future. (ie. this effort does not have to be fully
>> > > complete by the end of the SoC in order to be beneficial)
>> > >
>> > > Here are some links to the annotation extensions in JavaDoc:
>> > >
>> > >
>> > >
>> >
>> http://openjpa.apache.org/builds/latest/docs/javadoc/org/apache/openjpa/persistence/package-summary.html-
>> > > Annotation Types Summary section
>> > >
>> > >
>> > >
>> >
>> http://openjpa.apache.org/builds/latest/docs/javadoc/org/apache/openjpa/persistence/jdbc/package-summary.html-
>> > > Annotation Types Summary section
>> > >
>> > > If you are interested, I'd be happy to send you additional information
>> to
>> > > help you make a better evaluation and/or get started.
>> > >
>> > > -Jeremy
>> > >
>> > > [1] http://openjpa.apache.org/quick-start.html
>> > >
>> > > On Sun, Jan 30, 2011 at 2:53 AM, Umashanthi Pavalanathan <
>> > > umashanthip@gmail.com> wrote:
>> > >
>> > > > Hi devs,
>> > > >
>> > > > I am an undergraduate student interested in contributing to OpenJPA
>> and
>> > > > would like to know whether you have any ideas for Google Summer of
>> Code
>> > > > 2011.
>> > > >
>> > > > I have checked out the source code and successfully built it with
>> the
>> > > help
>> > > > of Mark. Currently I am in the process of studying the Java
>> Persistence
>> > > API
>> > > > using the OpenJPA user guide. Any suggestions and links to resources
>> > that
>> > > > would help me understand the concepts and get started with OpenJPA?
>> > > >
>> > > >
>> > > > Thanks in advance,
>> > > > ~Umashanthi
>> > > >
>> > >
>> >
>>
>
>
Re: Ideas for Google Summer of Code 2011
Posted by Umashanthi Pavalanathan <um...@gmail.com>.
On Fri, Apr 8, 2011 at 1:41 PM, Miłosz Tylenda <mt...@o2.pl> wrote:
> Hi Umashanthi,
>
> When you start the investigation work on annotations, please note that
> @Replicated has recently been abandoned and you can skip it.
>
Thanks for that info, Milosz.
~Umashanthi
>
> Greetings,
> Milosz
>
>
Re: Ideas for Google Summer of Code 2011
Posted by Miłosz Tylenda <mt...@o2.pl>.
Hi Umashanthi,
When you start the investigation work on annotations, please note that @Replicated has recently been abandoned and you can skip it.
Greetings,
Milosz
Re: Ideas for Google Summer of Code 2011
Posted by Jeremy Bauer <te...@gmail.com>.
Great work on the proposal! Thank you for your interest in the project and
for the submission. I really hope it is one of the projects that are chosen
for GSoC. Best of luck and I'll be sure to vote for you!
-Jeremy
On Thu, Apr 7, 2011 at 4:50 PM, Umashanthi Pavalanathan <
umashanthip@gmail.com> wrote:
> Hi devs,
>
> I have submitted my proposal for the project on "Provide XML-based
> configuration for OpenJPA's custom metadata and mapping extensions" to
> Google. The proposal is available at [1].
>
> I would be glad to hear your thoughts.
>
> Thanks,
> ~Umashanthi
>
>
> [1]
>
> https://docs.google.com/document/pub?id=1lYyx13FroAlCIr7gIV4xugzXLDh2z9llXq42XTVRIuM
>
> On Sat, Mar 26, 2011 at 6:59 PM, Umashanthi Pavalanathan <
> umashanthip@gmail.com> wrote:
>
> >
> >
> > On Sat, Feb 5, 2011 at 9:10 PM, Umashanthi Pavalanathan <
> > umashanthip@gmail.com> wrote:
> >
> >> Hi Jeremy,
> >>
> >> On Thu, Feb 3, 2011 at 8:46 PM, Jeremy Bauer <te...@gmail.com>
> wrote:
> >>
> >>> Hi Umashanthi,
> >>>
> >>> >Further I went through the Javadocs of OpenJPA annotations you
> mentioned
> >>> and
> >>> >the JPA's XML-ORM XML scheme. I understood that the requirement is to
> >>> create
> >>> >an XML schema for the custom annotations of OpenJPA, similar to the
> one
> >>> >provided for default annotations of JPA, mentioned in section 12.3 of
> >>> the
> >>> >spec. Did I get it right?
> >>>
> >>> You got it right. One part of the effort is to create a schema similar
> >>> to
> >>> the orm schema defined in 12.3 of the 2.0 spec. I have a few ideas as
> to
> >>> the
> >>> different approaches that one could take, but I'll let you think on it
> >>> and
> >>> come up with ideas. I don't want to hinder your creativity. :-) But,
> >>> I'll
> >>> be happy to provide suggestions if you'd like.
> >>>
> >>
> >> Hope I can come up with some ideas when I proceed with the findings...
> >>
> >>
> >>>
> >>> >Currently I'm continuing with the spec and samples. I would like to
> read
> >>> >more details about the custom annotations of OpenJPA. It'll be great
> if
> >>> you
> >>> >can provide any related resources, if available.
> >>>
> >>> Unfortunately, I've found that resources for the extensions are lacking
> >>> JavaDoc, documentation, and in some cases, example usage/testing. You
> >>> may
> >>> find some annotations within OpenJPA documentation[1]. I've found that
> >>> the
> >>> best resource is our jUnits. Search for the annotation and then track
> >>> the
> >>> persistent class where it is used back to the test case(s). As you go
> >>> through this exercise, updates to the annotation JavaDoc would be
> hugely
> >>> valuable as well.
> >>>
> >>
> >> Thanks for pointing out the user manual; it has good descriptions for
> some
> >> annotations. I started with the approach you mentioned and started to
> >> document resources (Java docs, user manual, code usages) related to each
> >> custom annotation. You can find the published version of the
> GoogleDoc[1].
> >> I'll be updating this doc for all annotations and will look at the
> usages in
> >> code, to find any possible additions to the JavaDoc.
> >>
> >
> > My apologies; I was not active for a while due to my University
> > examinations. Since I'm done with that I've resumed this effort.
> > I've done with tabulating all the annotations extensions to the GoogeDoc.
> > Now I will start with understanding each annotation extension using the
> > JavaDoc, user manual and usages in the source code; as Jeremy suggested I
> > will also add more descriptions to the JavaDoc if there's any lack of
> > content.
> >
> > Since the Google Summer of Code application period is going to start
> soon,
> > I would like to know the process for marking this as a GSoC project. I
> > noticed that many other ASF projects are following last year's method of
> > adding project ideas to the JIRA and tagging it with 'gsoc2011'. Is it
> the
> > same with OpenJPA?
> >
> > Jeremy, I hope you will be able to mentor this project.
> >
> > Is there any other procedures to be followed along with preparing the
> > project proposal? I would like to hear the thoughts of the community
> > regarding this.
> >
> >
> > Thanks in advance,
> > ~Umashanthi
> >
> >
> >
> >>
> >>
> >> [1]
> >>
> https://docs.google.com/document/pub?id=1ABqZlq5qwGORtbfin9_3h9FiymF506g-8IprJGwH9sY
> >>
> >> Thanks,
> >> ~Umashanthi
> >>
> >>
> >>
> >>>
> >>> -Jeremy
> >>>
> >>> [1] http://openjpa.apache.org/builds/latest/docs/manual/manual.pdf
> >>>
> >>> On Tue, Feb 1, 2011 at 4:25 PM, Umashanthi Pavalanathan <
> >>> umashanthip@gmail.com> wrote:
> >>>
> >>> > Hi Jeremy,
> >>> >
> >>> > On Mon, Jan 31, 2011 at 10:39 PM, Jeremy Bauer <te...@gmail.com>
> >>> > wrote:
> >>> >
> >>> > > Hi Umashanthi,
> >>> > >
> >>> > > Thanks for your interest in OpenJPA. I'm glad you were able to get
> >>> the
> >>> > > code
> >>> > > and get it building. Besides reading the spec, the OpenJPA quick
> >>> start
> >>> > > guide[1] (especially the examples) is a good place to start.
> >>> > >
> >>> > > Here is one SoC project idea...
> >>> > >
> >>> > > The JPA specification includes many annotations for the
> specification
> >>> of
> >>> > > metadata and mapping information within Java classes. In addition,
> >>> the
> >>> > > spec
> >>> > > provides a means to supply the same information within XML
> >>> configuration
> >>> > > files (orm.xml). One primary benefit of XML config files is it
> >>> allows
> >>> > > modification of the ORM information without needing to recompile
> the
> >>> > source
> >>> > > code.
> >>> > >
> >>> >
> >>> > I went through the sections on annotations of the JPA 2.0 spec (
> >>> Chapters
> >>> > 10,11&12) and got some understanding of the XML O/R mapping
> descriptors
> >>> and
> >>> > their use. As it is mentioned, the mapping descriptor serves as both
> an
> >>> > alternative to and an overrid-
> >>> > ing mechanism for Java language metadata annotations.
> >>> >
> >>> >
> >>> > >
> >>> > > OpenJPA has many custom metadata and mapping annotations that can
> be
> >>> used
> >>> > > to
> >>> > > provided functionality beyond the JPA specification. However,
> these
> >>> > > extensions are available only through annotations. There is
> >>> currently no
> >>> > > means to specify the metadata or mapping extensions via XML. We've
> >>> had
> >>> > > several requests for this capability, but it hasn't seen much/any
> >>> > activity.
> >>> > >
> >>> >
> >>> > Further I went through the Javadocs of OpenJPA annotations you
> >>> mentioned
> >>> > and
> >>> > the JPA's XML-ORM XML scheme. I understood that the requirement is to
> >>> > create
> >>> > an XML schema for the custom annotations of OpenJPA, similar to the
> one
> >>> > provided for default annotations of JPA, mentioned in section 12.3 of
> >>> the
> >>> > spec. Did I get it right?
> >>> >
> >>> >
> >>> >
> >>> > >
> >>> > > In part, this effort would include:
> >>> > >
> >>> > > 1) Understanding OpenJPA's annotatation extensions.
> >>> > > 2) Determining which annotations make sense to provide in XML
> >>> > configuration
> >>> > > 3) Designing a schema for the XML-based configuration file
> >>> > > (openjpa-orm.xml?)
> >>> > > 4) Creating metadata and mapping parsers for the new XML mapping
> file
> >>> > > 5) Wiring the new parsers into the existing code path.
> >>> > >
> >>> >
> >>> > I understood the above steps more after going through the spec &
> >>> resources.
> >>> >
> >>> > Currently I'm continuing with the spec and samples. I would like to
> >>> read
> >>> > more details about the custom annotations of OpenJPA. It'll be great
> if
> >>> you
> >>> > can provide any related resources, if available.
> >>> >
> >>> >
> >>> > Thanks,
> >>> > ~Umashanthi
> >>> >
> >>> >
> >>> > >
> >>> > > I think this would make a good SoC project because:
> >>> > >
> >>> > > 1) The work is well defined and fairly self contained.
> >>> > > 2) It would be a good experience in adding additional capabilities
> to
> >>> a
> >>> > > mature piece of software.
> >>> > > 3) It wouldn't require spending much/any time trying to understand
> >>> > OpenJPA
> >>> > > internals - which can be very time consuming. Instead, you'll be
> >>> > learning
> >>> > > about JPA and OpenJPA's powerful extensions - especially by
> learning
> >>> what
> >>> > > the extensions do and writing jUnits to test the capability via XML
> >>> > > mappings.
> >>> > > 4) This activity can be ongoing. Not all extensions need to be
> >>> > immediately
> >>> > > available. Once the base framework is available, incomplete
> >>> extensions
> >>> > can
> >>> > > be added in the future. (ie. this effort does not have to be
> fully
> >>> > > complete by the end of the SoC in order to be beneficial)
> >>> > >
> >>> > > Here are some links to the annotation extensions in JavaDoc:
> >>> > >
> >>> > >
> >>> > >
> >>> >
> >>>
> http://openjpa.apache.org/builds/latest/docs/javadoc/org/apache/openjpa/persistence/package-summary.html-
> >>> > > Annotation Types Summary section
> >>> > >
> >>> > >
> >>> > >
> >>> >
> >>>
> http://openjpa.apache.org/builds/latest/docs/javadoc/org/apache/openjpa/persistence/jdbc/package-summary.html-
> >>> > > Annotation Types Summary section
> >>> > >
> >>> > > If you are interested, I'd be happy to send you additional
> >>> information to
> >>> > > help you make a better evaluation and/or get started.
> >>> > >
> >>> > > -Jeremy
> >>> > >
> >>> > > [1] http://openjpa.apache.org/quick-start.html
> >>> > >
> >>> > > On Sun, Jan 30, 2011 at 2:53 AM, Umashanthi Pavalanathan <
> >>> > > umashanthip@gmail.com> wrote:
> >>> > >
> >>> > > > Hi devs,
> >>> > > >
> >>> > > > I am an undergraduate student interested in contributing to
> OpenJPA
> >>> and
> >>> > > > would like to know whether you have any ideas for Google Summer
> of
> >>> Code
> >>> > > > 2011.
> >>> > > >
> >>> > > > I have checked out the source code and successfully built it with
> >>> the
> >>> > > help
> >>> > > > of Mark. Currently I am in the process of studying the Java
> >>> Persistence
> >>> > > API
> >>> > > > using the OpenJPA user guide. Any suggestions and links to
> >>> resources
> >>> > that
> >>> > > > would help me understand the concepts and get started with
> OpenJPA?
> >>> > > >
> >>> > > >
> >>> > > > Thanks in advance,
> >>> > > > ~Umashanthi
> >>> > > >
> >>> > >
> >>> >
> >>>
> >>
> >>
> >
>
Re: Ideas for Google Summer of Code 2011
Posted by Umashanthi Pavalanathan <um...@gmail.com>.
Hi devs,
I have submitted my proposal for the project on "Provide XML-based
configuration for OpenJPA's custom metadata and mapping extensions" to
Google. The proposal is available at [1].
I would be glad to hear your thoughts.
Thanks,
~Umashanthi
[1]
https://docs.google.com/document/pub?id=1lYyx13FroAlCIr7gIV4xugzXLDh2z9llXq42XTVRIuM
On Sat, Mar 26, 2011 at 6:59 PM, Umashanthi Pavalanathan <
umashanthip@gmail.com> wrote:
>
>
> On Sat, Feb 5, 2011 at 9:10 PM, Umashanthi Pavalanathan <
> umashanthip@gmail.com> wrote:
>
>> Hi Jeremy,
>>
>> On Thu, Feb 3, 2011 at 8:46 PM, Jeremy Bauer <te...@gmail.com> wrote:
>>
>>> Hi Umashanthi,
>>>
>>> >Further I went through the Javadocs of OpenJPA annotations you mentioned
>>> and
>>> >the JPA's XML-ORM XML scheme. I understood that the requirement is to
>>> create
>>> >an XML schema for the custom annotations of OpenJPA, similar to the one
>>> >provided for default annotations of JPA, mentioned in section 12.3 of
>>> the
>>> >spec. Did I get it right?
>>>
>>> You got it right. One part of the effort is to create a schema similar
>>> to
>>> the orm schema defined in 12.3 of the 2.0 spec. I have a few ideas as to
>>> the
>>> different approaches that one could take, but I'll let you think on it
>>> and
>>> come up with ideas. I don't want to hinder your creativity. :-) But,
>>> I'll
>>> be happy to provide suggestions if you'd like.
>>>
>>
>> Hope I can come up with some ideas when I proceed with the findings...
>>
>>
>>>
>>> >Currently I'm continuing with the spec and samples. I would like to read
>>> >more details about the custom annotations of OpenJPA. It'll be great if
>>> you
>>> >can provide any related resources, if available.
>>>
>>> Unfortunately, I've found that resources for the extensions are lacking
>>> JavaDoc, documentation, and in some cases, example usage/testing. You
>>> may
>>> find some annotations within OpenJPA documentation[1]. I've found that
>>> the
>>> best resource is our jUnits. Search for the annotation and then track
>>> the
>>> persistent class where it is used back to the test case(s). As you go
>>> through this exercise, updates to the annotation JavaDoc would be hugely
>>> valuable as well.
>>>
>>
>> Thanks for pointing out the user manual; it has good descriptions for some
>> annotations. I started with the approach you mentioned and started to
>> document resources (Java docs, user manual, code usages) related to each
>> custom annotation. You can find the published version of the GoogleDoc[1].
>> I'll be updating this doc for all annotations and will look at the usages in
>> code, to find any possible additions to the JavaDoc.
>>
>
> My apologies; I was not active for a while due to my University
> examinations. Since I'm done with that I've resumed this effort.
> I've done with tabulating all the annotations extensions to the GoogeDoc.
> Now I will start with understanding each annotation extension using the
> JavaDoc, user manual and usages in the source code; as Jeremy suggested I
> will also add more descriptions to the JavaDoc if there's any lack of
> content.
>
> Since the Google Summer of Code application period is going to start soon,
> I would like to know the process for marking this as a GSoC project. I
> noticed that many other ASF projects are following last year's method of
> adding project ideas to the JIRA and tagging it with 'gsoc2011'. Is it the
> same with OpenJPA?
>
> Jeremy, I hope you will be able to mentor this project.
>
> Is there any other procedures to be followed along with preparing the
> project proposal? I would like to hear the thoughts of the community
> regarding this.
>
>
> Thanks in advance,
> ~Umashanthi
>
>
>
>>
>>
>> [1]
>> https://docs.google.com/document/pub?id=1ABqZlq5qwGORtbfin9_3h9FiymF506g-8IprJGwH9sY
>>
>> Thanks,
>> ~Umashanthi
>>
>>
>>
>>>
>>> -Jeremy
>>>
>>> [1] http://openjpa.apache.org/builds/latest/docs/manual/manual.pdf
>>>
>>> On Tue, Feb 1, 2011 at 4:25 PM, Umashanthi Pavalanathan <
>>> umashanthip@gmail.com> wrote:
>>>
>>> > Hi Jeremy,
>>> >
>>> > On Mon, Jan 31, 2011 at 10:39 PM, Jeremy Bauer <te...@gmail.com>
>>> > wrote:
>>> >
>>> > > Hi Umashanthi,
>>> > >
>>> > > Thanks for your interest in OpenJPA. I'm glad you were able to get
>>> the
>>> > > code
>>> > > and get it building. Besides reading the spec, the OpenJPA quick
>>> start
>>> > > guide[1] (especially the examples) is a good place to start.
>>> > >
>>> > > Here is one SoC project idea...
>>> > >
>>> > > The JPA specification includes many annotations for the specification
>>> of
>>> > > metadata and mapping information within Java classes. In addition,
>>> the
>>> > > spec
>>> > > provides a means to supply the same information within XML
>>> configuration
>>> > > files (orm.xml). One primary benefit of XML config files is it
>>> allows
>>> > > modification of the ORM information without needing to recompile the
>>> > source
>>> > > code.
>>> > >
>>> >
>>> > I went through the sections on annotations of the JPA 2.0 spec (
>>> Chapters
>>> > 10,11&12) and got some understanding of the XML O/R mapping descriptors
>>> and
>>> > their use. As it is mentioned, the mapping descriptor serves as both an
>>> > alternative to and an overrid-
>>> > ing mechanism for Java language metadata annotations.
>>> >
>>> >
>>> > >
>>> > > OpenJPA has many custom metadata and mapping annotations that can be
>>> used
>>> > > to
>>> > > provided functionality beyond the JPA specification. However, these
>>> > > extensions are available only through annotations. There is
>>> currently no
>>> > > means to specify the metadata or mapping extensions via XML. We've
>>> had
>>> > > several requests for this capability, but it hasn't seen much/any
>>> > activity.
>>> > >
>>> >
>>> > Further I went through the Javadocs of OpenJPA annotations you
>>> mentioned
>>> > and
>>> > the JPA's XML-ORM XML scheme. I understood that the requirement is to
>>> > create
>>> > an XML schema for the custom annotations of OpenJPA, similar to the one
>>> > provided for default annotations of JPA, mentioned in section 12.3 of
>>> the
>>> > spec. Did I get it right?
>>> >
>>> >
>>> >
>>> > >
>>> > > In part, this effort would include:
>>> > >
>>> > > 1) Understanding OpenJPA's annotatation extensions.
>>> > > 2) Determining which annotations make sense to provide in XML
>>> > configuration
>>> > > 3) Designing a schema for the XML-based configuration file
>>> > > (openjpa-orm.xml?)
>>> > > 4) Creating metadata and mapping parsers for the new XML mapping file
>>> > > 5) Wiring the new parsers into the existing code path.
>>> > >
>>> >
>>> > I understood the above steps more after going through the spec &
>>> resources.
>>> >
>>> > Currently I'm continuing with the spec and samples. I would like to
>>> read
>>> > more details about the custom annotations of OpenJPA. It'll be great if
>>> you
>>> > can provide any related resources, if available.
>>> >
>>> >
>>> > Thanks,
>>> > ~Umashanthi
>>> >
>>> >
>>> > >
>>> > > I think this would make a good SoC project because:
>>> > >
>>> > > 1) The work is well defined and fairly self contained.
>>> > > 2) It would be a good experience in adding additional capabilities to
>>> a
>>> > > mature piece of software.
>>> > > 3) It wouldn't require spending much/any time trying to understand
>>> > OpenJPA
>>> > > internals - which can be very time consuming. Instead, you'll be
>>> > learning
>>> > > about JPA and OpenJPA's powerful extensions - especially by learning
>>> what
>>> > > the extensions do and writing jUnits to test the capability via XML
>>> > > mappings.
>>> > > 4) This activity can be ongoing. Not all extensions need to be
>>> > immediately
>>> > > available. Once the base framework is available, incomplete
>>> extensions
>>> > can
>>> > > be added in the future. (ie. this effort does not have to be fully
>>> > > complete by the end of the SoC in order to be beneficial)
>>> > >
>>> > > Here are some links to the annotation extensions in JavaDoc:
>>> > >
>>> > >
>>> > >
>>> >
>>> http://openjpa.apache.org/builds/latest/docs/javadoc/org/apache/openjpa/persistence/package-summary.html-
>>> > > Annotation Types Summary section
>>> > >
>>> > >
>>> > >
>>> >
>>> http://openjpa.apache.org/builds/latest/docs/javadoc/org/apache/openjpa/persistence/jdbc/package-summary.html-
>>> > > Annotation Types Summary section
>>> > >
>>> > > If you are interested, I'd be happy to send you additional
>>> information to
>>> > > help you make a better evaluation and/or get started.
>>> > >
>>> > > -Jeremy
>>> > >
>>> > > [1] http://openjpa.apache.org/quick-start.html
>>> > >
>>> > > On Sun, Jan 30, 2011 at 2:53 AM, Umashanthi Pavalanathan <
>>> > > umashanthip@gmail.com> wrote:
>>> > >
>>> > > > Hi devs,
>>> > > >
>>> > > > I am an undergraduate student interested in contributing to OpenJPA
>>> and
>>> > > > would like to know whether you have any ideas for Google Summer of
>>> Code
>>> > > > 2011.
>>> > > >
>>> > > > I have checked out the source code and successfully built it with
>>> the
>>> > > help
>>> > > > of Mark. Currently I am in the process of studying the Java
>>> Persistence
>>> > > API
>>> > > > using the OpenJPA user guide. Any suggestions and links to
>>> resources
>>> > that
>>> > > > would help me understand the concepts and get started with OpenJPA?
>>> > > >
>>> > > >
>>> > > > Thanks in advance,
>>> > > > ~Umashanthi
>>> > > >
>>> > >
>>> >
>>>
>>
>>
>