In JPOX we are implementing the access to multiple datastores within a single PM/TX. If not too late, Im wonder if you like to hear a proposal to standardize the configuration of the jdoconfig and jdo metadata to be able to handle this scenario. It may sound overkill, but IMO is a major advance over JPA.
To introduce the subject, the goal is to handle persistence in multiple databases (e.g. derby, oracle, DB4O, Versant, XML) within a single JDO transaction/ single PM. From the user point of view, there are two items that must be configured, jdo metadata, jdo configuration, in which would be part of this proposal, so I show below an example of the configurations: /jdoconfig/ sequence unbounded PMF /jdoconfig/ sequence unbounded Resource /PMF/ /PMF/@Class /PMF/@TransactionTimeout /PMF/@... /Resource/ /Resource/@Name /Resource/Connection Settings/ /Resource/Connection Settings/@ConnectionFactoryName /Resource/Connection Settings/@ConnectionClientID /Resource/Connection Settings/@ReadOnly /Resource/Connection Settings/@... /Resource/Transaction/ /Resource/Transaction/@TwoPhaseCommit /Resource/Transaction/@Timeout ConnectionClientID ---------------------------- ConnectionClientID is the identifier for the connection. Some databases such as Oracle use this to identify the end user (not the connection user). ConnectionClientID would accept the values: 1 - CredentialMapping - the CredentialMapping takes the principal of the running application and sets it as client id - eg. ConnectionClientID=CredentialMapping 2 - Identity the client id is taken from the id right after the Identity word - eg. ConnectionClientID=Identity:MyUser ReadOnly ---------------------------- ReadOnly (accepts true, false) will block write operations to this connection TwoPhaseCommit -------------------------- Two options: 1 LastLoggingResource - If the resource is non XA, push down this resource in commit order. 2 Emulated Emulates non XA protocol. Heuristics errors could happen Example: <jdoconfig> <pmf name=snowdog default-resource=Oracle> </pmf> <resource name=ERP> <connection connectionfactoryname=BSCS_Hot/> </resource> <resource name=PeopleSoft> <connection connectionfactoryname=PS_Onyx/> </resource> <resource name=Oracle> <connection connectionfactoryname=ORA_Vinci connection-client-id=CredentialMapping/> <transaction two-phase-commit=LLR timeout=30/> </resource> <resource name=Xml> <connection readonly=true/> <extension> <jpox:xml file=file:/usr/home/myxml.xml/> </extension> </resource> </jdoconfig> <jdo> <package> <class name=Invoice resource=ERP/> <class name=ClassData/> <!-- uses default-resource --> <class name=Person resource=PeopleSoft/> <class name=ReferenceData resource=Xml/> </package> </jdo> Quoting Michelle Caisse <[EMAIL PROTECTED]>: > Hi, > > We will have our regular meeting Friday, October 26 at 9 am PDT to > discuss JDO TCK issues and status. > > Dial-in numbers are: > 866 230-6968 294-0479# > International: +1 865 544-7856 > > Agenda: > > 1. Subquery spec update > 2. Other issues > > Action Items from weeks past: > > [Oct 12 2007] AI Michael take a look at subquery tck tests. > https://issues.apache.org/jira/browse/JDO-446 > > [Sep 14 2007] AI Matthew provide examples for 8.6.1.1 jdoconfig.xml. > > [June 22 2007] AI Craig discuss svn:eol-style on email. > > [June 22 2007] AI Craig write a proposal on annotation overrides for > the expert group. > > [May 25 2007] AI everyone Download the Grails demo from grails.org and > check it out. Also look at Grails/Groovy ExpandoMetaClass that has the > magic to avoid reflection and enhancement. > > [May 25 2007] AI Matthew Adams prepare a proposal with just the basics > of schema synchronization with jdo and orm metadata. > > [May 18 2007] AI Craig update http://wiki.apache.org/jdo/ > CurrentDevelopment wiki page > > [Apr 27 2007] AI Craig review Query API and send email to experts. > > [Apr 27 2007] AI Erik file a JIRA regarding JPA style transactions and > attach his discussion document to it. > > [Mar 9 2007] AI Craig: Update the spec to require that the key of the > listener is the class name of the listener, for consistency with > proposed xml.. > > [Mar 2 2007] AI Craig: update the JDOHelper class to include a string > constant "META-INF/jdo.xml" and a new method > getPersistenceManagerFactory taking no arguments. > > [Aug 11 2006] AI Craig propose some semantics for behavior if user > tries to add to a list where the ordering element is incorrect. > > [Jul 14 2006] AI: Erik document 220 annotations that don't have a > corresponding JDO concept. > > [Jun 23 2006] AI Martin look at what Hibernate and TopLink support > for Enum types. In progress. > > [Apr 14 2006] AI Craig: update the roadmap for JDO. In progress. > > [Nov 4 2005] AI Martin: Update Martin's wiki with discusion of JDK 1.5 > issues. In progress > > [Sep 2 2005] AI: To recruit members, update the web site. Articles on > TheServerSide directing attention to the site. T-shirts, logo. AI: > Craig write a ServerSide article. > > -- Michelle > > > >
