Doc for Application Identity?

Question

All,
I notice that in the release notes, application identity is supported as of beta 2.20, and I know
that several people here are using the functionality, but in looking though the documentation, I
didn't find a section on application identity. Would someone point me in the right direction?
TIA
David

Answer 1

David Ezzio <[email protected]> writes:
All,
I notice that in the release notes, application identity is supported as of beta 2.20, and I know
that several people here are using the functionality, but in looking though the documentation, I
didn't find a section on application identity. Would someone point me in the right direction?David,
What problems in particular are you having? There is really only one
aspect of Kodo JDO's application identity system that requires special
documentation. The mechanism for providing a custom schema mapping is
slightly different when using application identity than when using data
store identity. See docs/existing-schema.html for details.
Aside from this situation, you should be able to just specify the
'identity-type' and 'objectid-class' attributes of the 'class' element
to 'application'. For example, the XML below could be a valid
package.jdo entry for the tutorial.Animal class if it had two fields
called 'pk1' and 'pk2' which constituted the application-managed object
id. Note that you must create your own object id class for Animal
(identified as 'AnimalID' in the example). You may want to use
com.solarmetric.kodo.tools.appid.ApplicationIDTool to auto-generate a
template Java file.
<?xml version="1.0"?>
<jdo>
     <package name="tutorial">
          <class name="Animal" identity-type="application"
objectid-class="AnimalID" >
               <field name="pk1" primary-key="true"/>
               <field name="pk2" primary-key="true"/>
</class>
     </package>
</jdo>
Good luck, and let me know if you need further assistance.
-Patrick
Patrick Linskey [email protected]
SolarMetric Inc. http://www.solarmetric.com