[rules-dev] RE: [rules-users] Compatibility of Rule Flows from 4.0.7 to 5.0.0
Mark Proctor
mproctor at codehaus.org
Thu Oct 30 10:16:47 EDT 2008
Nimesh Muley wrote:
>
> Oh ok. I developed it because you mentioned whether it would be
> possible to plug it in package reader.
>
>
>
> I think we can close this JIRA as invalid.
>
The code handles the migration right, does it already hook into the
package reader? I wasn't sure, as i haven't read the code yet. Are you
saying the patch will detect which version of the XML it is, and upgrade
on the fly?
My assumption was that it was just some code to migrate from 4 to 5, but
someone still needs to execute that, so it seemed the easiest route was
to do this via an eclipse option for now - as hooking into
packagebuilder with auto detection was more work and needed more
testing, but if you have done this already....
>
>
>
> In case there is a change of mind later on we already have a patch for
> it ;-).
>
see above.
>
>
>
> Thanks.
>
> Regards,
>
> - Nimesh
>
>
>
> *From:* rules-dev-bounces at lists.jboss.org
> [mailto:rules-dev-bounces at lists.jboss.org] *On Behalf Of *Mark Proctor
> *Sent:* Thursday, October 30, 2008 5:10 PM
> *To:* Rules Dev List
> *Subject:* Re: [rules-dev] RE: [rules-users] Compatibility of Rule
> Flows from 4.0.7 to 5.0.0
>
>
>
> Nimesh Muley wrote:
>
> Hi,
>
>
>
> I have raised a feature request for this
> https://jira.jboss.org/jira/browse/JBRULES-1797 and also submitted a
> patch (JBRULES-1797.patch.zip) for the same. If there are any changes
> in the patch kindly let me know.
>
> I believe kris is going to add a feature to eclipse where you can
> select a ruleflow for it to convert, don't think we are going to go
> for auto-detection and conversion on the fly with the packagebuilder.
>
> Mark
>
>
>
> Thanks.
>
> Regards,
>
> - Nimesh
>
>
>
> *From:* rules-dev-bounces at lists.jboss.org
> <mailto:rules-dev-bounces at lists.jboss.org>
> [mailto:rules-dev-bounces at lists.jboss.org] *On Behalf Of *Nimesh Muley
> *Sent:* Monday, October 06, 2008 10:08 AM
> *To:* 'rules-dev at lists.jboss.org <mailto:rules-dev at lists.jboss.org>'
> *Subject:* [rules-dev] RE: [rules-users] Compatibility of Rule Flows
> from 4.0.7 to 5.0.0
>
>
>
> Hi,
>
>
>
> By going through the code it seems possible to achieve this by
> modifying ProcessBuilder.addProcessFromFile. Easiest check would be to
> see whether the XML contains element called as "process". Since XML
> Parsing is internal to the individual releases (4.0 uses XStream and
> 5.0 uses XMLReader), I am not sure whether we should form a XML
> document from the reader to check if the process belongs to version
> 4.0 or compliant.
>
>
>
> Brute force check would be indexOf ("<process") >= 0 then it is 5.0
> else 4.0 ;-). I am sure there would be better ways than this kind of
> check.
>
>
>
> I do not mind taking this further. Due to lack of in depth knowledge
> about drools, I am not able to decide what the approach should be for
> checking the version.
>
>
>
> This would be a really good feature as it would mean that drools 5.0
> is backward compliant for rule flows J. And this adds lot of
> confidence to enterprises.
>
>
>
> p.s. Since this was now moving towards dev, I have moved the thread to
> the dev mailing list.
>
> Thanks.
>
> Regards,
>
> - Nimesh
>
>
>
> *From:* rules-users-bounces at lists.jboss.org
> <mailto:rules-users-bounces at lists.jboss.org>
> [mailto:rules-users-bounces at lists.jboss.org] *On Behalf Of *Mark Proctor
> *Sent:* Saturday, October 04, 2008 9:37 PM
> *To:* Rules Users List
> *Subject:* Re: [rules-users] Compatibility of Rule Flows from 4.0.7 to
> 5.0.0
>
>
>
> You are a star, that saves us a lot of work :) I'm wondering if we can
> work this into the package reader and some how have it detect whether
> something is version 4 or 5 and convert first if it's 4, fancy having
> a look and seeing if that's possible?
>
> Mark
>
> Nimesh Muley wrote:
>
> Hi,
>
>
>
> I have attached a file for translating rule flows from 4.0 to 5.0. I
> have tested my flows with the XSL and it works fine. However, the XSLT
> may not be quite slick or compact as I have touched upon XSLT after a
> long time. I have covered all the nodes available (ruleSet, start,
> end, join, split, milestone, action and subProcess).
>
>
>
> There is one issue in the XSLT. I have not added the xmlns attribute
> to the process element. Reason is that this attribute appears in child
> nodes too with empty string, even though it is not mentioned for the
> child nodes. This attribute is needed in the 'process' node because
> the Eclipse editor for 5.0 ignores the process node if there are more
> than 2 sub processes in that ruleflow. Am not sure why this is
> happening but that has been my observation.
>
>
>
> In case XSLT is not present as an attachment then let me know the
> location where it can be uploaded.
>
>
>
> Thanks.
>
> Regards,
>
> - Nimesh
>
>
>
> *From:* rules-users-bounces at lists.jboss.org
> <mailto:rules-users-bounces at lists.jboss.org>
> [mailto:rules-users-bounces at lists.jboss.org] *On Behalf Of *Mark Proctor
> *Sent:* Tuesday, September 30, 2008 7:26 PM
> *To:* Rules Users List
> *Subject:* Re: [rules-users] Compatibility of Rule Flows from 4.0.7 to
> 5.0.0
>
>
>
> No they are not compatible, 5.0 has a new ePDL XML language that is
> human writable. I suggest that somone in the community starts looking
> into an XSLT to translate them.
>
> Mark
> Vikrant Yagnick wrote:
>
> Hi All,
>
>
>
> I wanted to know if RuleFlows made using the Eclipse 4.0.7 RuleFlow
> Builder will work with 5.0.0. When, I try to upload a 4.0.7 ruleflow
> into Guvnor, I get a NullPointerException and before that the following:
>
>
>
> Cannot find the declaration of element
> 'org.drools.ruleflow.core.impl.RuleFlowProcessImpl'.
>
>
>
> I checked the 5.0.0M1 jars for drools-core, and this class seems to
> have been removed from there. Also, after installing the 5.0.0 plug-in
> into Eclipse, my rule-flow nodes have all gone.
>
>
>
>
>
> Also, this may be a minor bug but it says(both in the docs and the
> BRMS Guvnor M1 Release):
>
> "/Ruleflows allow flow control between rules. The eclipse plugin
> provides a graphical editor. Upload /*/_ruleflow .rf_/*/ files for
> inclusion in this package./":
>
>
>
> Should the .rf say .rfm ?
>
>
>
> Cheers,
>
> Vikrant
>
>
>
>
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