Best way to get started is to pull from CVS (is always stable) and look at the samples. If you think of something it needs, I'll prolly be happy to put it in. I use this thing pretty much every day.
-Brian
On Sep 21, 2004, at 7:13 PM, Ajitesh Das wrote:
Brian: I am not able to d'load the project or able to find any docs. Can u send me the pointer? ~ajitesh
-----Original Message----- From: Brian McCallister [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 21, 2004 3:03 PM To: OJB Users List Subject: Re: REPOST: OJB's support for object migration: [e.g torque table schema- how to alter existing table ]
OJB doesn't transparently migrate data -- I don't know of any good high-level general purpose tool which can do that. I wrote an incremental data-migration oriented tool a while back, but it doesn't use an o/r mapping. Simple is a dependency resolver with convenience features for database migrations.
http://migratosaur.dev.java.net
Nothing fancy about it, but it is maintained and works well for me =) No automated schema change discovery and guesswork -- no way to *know* the intention of changes, unfortunately. Any migration requires some human integration.
I can imagine a "database refactoring browser" with a drag/click-and-act/etc type thing which encapsulates the actions into a serializable thing to automate this, but to my knowledge no one has written one.
-Brian
On Sep 21, 2004, at 5:57 PM, Ajitesh Das wrote:
doneReposting again. Let's see if anybody has any recommendation.
-----Original Message----- Hi List: I like to know if anybody who uses OJB platform in his product hasanything on object model migration. This seems to be a missing pieceincanOJB project. Am I missing something? Example Scenario: I have an existing application that uses OJB as OR platform contains a set of business objects. In this new release, we are altering the definition of business object by adding new fields for some objects and deleting some fields for others. I would like to know how other users are handling the two situations: (a) When you add a new field to an existing object and (b) when you delete a field in an existing object. So that the old databe kept and properly defaulted.
I have searched the Wiki ,docs and mail archive but could not find any recommendation/reference from the OJB developers/gurus or reference to some design patterns.
Regds Ajitesh
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