Anstis, Michael (M.) wrote:
If the use-case of migrating packages through the environments holds
true I'd expect the meta-data associated with packages to remain constant.
Perhaps I've made an assumption that you don't have categories called
"Production rules", "QA rules" etc.
Thinking wider; is there a requirement to allow export\import to be
sliced and diced many different ways:-
*
Export\import a category
*
Export\import a package
*
Export\import working set
*
etc
The thing is that there are lots of external dependencies associated
with a package and package assets. To name a new, category, status (Dev,
QA, STAGE, PROD), permissions, comments etc.The list will grow bigger
and bigger when new features get implemented as long as the data
structure required by these features are not internal to a package. So
far we've figured one possible way that might solve the problem: when we
do package export, we export a data bundle that contains the package and
all essential data associated with this package (eg, category nodes,
status nodes etc). And when we do the import, we somehow deal with dirty
data programmatically (recover or discard the dirty data).
This is doable, but is this a practical approach? I would imagine a
single package data exported may contains over 60% data of that
repository. Not to mention the complexity of dealing with dirty data
during package import.
------------------------------------------------------------------------
*From:* rules-dev-bounces(a)lists.jboss.org
[mailto:rules-dev-bounces@lists.jboss.org] *On Behalf Of *Michael
Neale
*Sent:* 06 August 2010 08:00
*To:* Rules Dev List
*Subject:* Re: [rules-dev] Package based import/export in Guvnor
well for category things - it could be that if a category doesn't
exist in the target "space" then it is created, if not, it is
used. There are other things though, which are interlinked - but
the same issue you bring up applies (which is why this wasn't done
a while back).
So a simple JCR partial export won't really do - needs to be a bit
more programmatic than that.
The question is - in the target space - do we want to create the
missing things, or remove the links from them as part of the
export etc...
So if RuleA depends on categoryX and categoryY, but only categoryX
(same name) exists in the target place, then do we create
categoryY there, or strip it?
On Fri, Aug 6, 2010 at 4:44 PM, Jervis Liu <jliu(a)redhat.com
<mailto:jliu@redhat.com>> wrote:
Hi,
I am currently evaluating a Guvnor feature request which is to
implement
package based import/export. The idea is to use this feature
to move a
rule package from the DEV repo to QA to Stage to the Prod
repo. For
details please check
https://jira.jboss.org/browse/GUVNOR-311. My
initial investigation shows that it is not possible to do a single
package import/export technically. A single package in Guvnor
repository
is never a self-contained unit. For example, every asset under the
package has a mandatory attribute which is a reference link to
category
information. In short, package can not be exported/imported as
long as
it contains references to entities outside package.
There are two things I would like to ask for your opinions.
Firstly, can
you think of any way to implement this import/export feature?
Personally
I dont see how this can be done. This is similar to relational
database,
generally it is impossible to export and import data from/to a
single
non-isolated table in database. Or sometimes it is possible
but with
extensive care normally involved in manual work to deal with
dirty data.
In our case, one example of dirty data is category, but what
can we do
with category information, we discard package information when
we do
package export?
Secondly, if such feature can not be implemented, can we
figure out a
different way to help users to better manage the life cycle in
Guvnor?
The current version of Guvnor is not very strong on this part
yet. If
you are a Guvnor user or you have experience of using similar
products,
how did you manage and how do you want to manage the lifecycle
of assets
in your repository?
Thanks,
Jervis
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Michael D Neale
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