Hello! We are about to develop an application where customers are responsible to create various rules and define actions. There are a dictionary of available conditions applied to objects as well as set of predefined actions. For now we know there is a DRL, which is parsed and certain actions are executed, but we think the way our custom objects -> generate DRL -> parse DRL by Drools -> inject rules objects is a bit redundant, in such way we need to create additional layer to generate something which is to be parsed then by Drools. We would like to avoid such complexity, if possible. Is it possible to create our own objects which will act as rules for Drools framework, so we can implement some interfaces/inherit some abstract classes and inject our custom logic/objects there? Thank you in advance! -- Eugene N Dzhurinsky _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Hello Eugeny, Not sure if this is the recommended way, but I did something similar using the classes in the org.drools.lang.descr package. You can create a PackageDescr from your custom objects and then call PackageBuilder.addPackage(PackageDescr) and PackageBuilder.getPackage() to get an org.drools.rule.Package. I couldn't find any documentation on the org.drools.lang.descr package (javadoc is pretty minimal as well), but you should be able to work out what to do, at least for the basic stuff. Best wishes, Dean. On 7/16/07, Eugeny N Dzhurinsky <bofh(a)redwerk.com&gt; wrote: > Hello! > > We are about to develop an application where customers are responsible to > create various rules and define actions. There are a dictionary of available > conditions applied to objects as well as set of predefined actions. > > For now we know there is a DRL, which is parsed and certain actions are > executed, but we think the way > > our custom objects -> generate DRL -> parse DRL by Drools -> inject rules objects > > is a bit redundant, in such way we need to create additional layer to generate > something which is to be parsed then by Drools. > > We would like to avoid such complexity, if possible. > > Is it possible to create our own objects which will act as rules for Drools > framework, so we can implement some interfaces/inherit some abstract classes > and inject our custom logic/objects there? > > Thank you in advance! > > -- > Eugene N Dzhurinsky > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

On Mon, Jul 16, 2007 at 11:51:30AM +0100, Dean Jones wrote: > Hello Eugeny, > > Not sure if this is the recommended way, but I did something similar > using the classes in the org.drools.lang.descr package. You can create > a PackageDescr from your custom objects and then call > PackageBuilder.addPackage(PackageDescr) and > PackageBuilder.getPackage() to get an org.drools.rule.Package. > > I couldn't find any documentation on the org.drools.lang.descr package > (javadoc is pretty minimal as well), but you should be able to work > out what to do, at least for the basic stuff. > > Best wishes, > > Dean. > Okay, looks like that's the way to define conditions only? Or do I miss something? If you could provide some examples of what you did find, or somebody of developers could tell is it right way to do things I described earlier?

On Mon, Jul 16, 2007 at 05:03:28PM +0100, Mark Proctor wrote: > descr's cover the full range of the drl language. I recommend you parse > some drl files into descrs, and look at the creates AST with your > debugger. > Okay, I took some simple example from Drools examples (HelloWorldExample) and tried to reverse engineer package object in Eclipse debugger, but looks like the package object doesn't contain any objects from descr package. I assume I need to compile that Package object somehow? Could somebody please point me to the right way in getting solid knowledge of how can I build custom package descriptor w/o any DRL/XML - but from my custom rule descriptors/storage? Thank you in advance!