[rules-users] Drools - Guvnor problem

[Wolfgang Laun]

Quoting from the original post:

"Our customer want that we use drools to administrate some objects. The
objects should be administrated with guvnor. Every object has one id, name
and description."

Perhaps a case of mistaken terminology?

-W



2011/7/6 Michael Anstis <michael.anstis at gmail.com>

> Guvnor provides for the means to author rules, not consume them.
>
> There's no capabilities to insert your objects (other than when writing
> test scenarios for your rules). This would be the realm of KnowledgeSessions
> and *your* application.
>
> If however you want your application (you do state "...in our web
> frontend") to be able to retrieve either a list of objects or a single one
> depending on whether the ID is provided then:-
>
> (a) I'd have thought you could simply achieve this without using a Rule
> Engine
>
> (b) If you want to use a rule engine then: insert all YourObjects into
> Working Memory and use Drools Queries to achieve your need with queries a
> bit like these:-
>
> query "all objects"
>     $l : ArrayList( ) from collect( YourObject( ) )
> end
>
> query "an objects" (int $id )
>     $l : YourObject( id == $id )
> end
>
> Have I missed your point?
>
>
> 2011/7/6 Wolfgang Laun <wolfgang.laun at gmail.com>
>
>> I suspected something like that, but *matching *facts of type System from
>> Working Memory and *inserting *recreated facts of the same type isn't
>> going to get them nearer to the GUI?
>>
>> -W
>>
>>
>>
>> On 6 July 2011 13:10, _bart <dgrundler at doubleslash.de> wrote:
>>
>>> Ok I will describe it again:
>>>
>>> We want to administrate some objects in guvnor. Every object has one id,
>>> one
>>> name and one description. We have round about 100 objects.
>>>
>>> One use case is, that all objects (id, name and description) should be
>>> displayed in a drop down box in our web frontend.
>>> The next use case is, that it has to be possible to load one object (id,
>>> name, decription) by id.
>>>
>>> My solution in pseudo code for the rule is:
>>>
>>> IF id IS SET search object and return it or return null if not exist.
>>> IF ID IS NOT SET return all objects.
>>>
>>> So I need a rule for these requirements. The rule above returns the
>>> object
>>> specified by id correctly (the id will be set with id $system.getId()).
>>> Also the rule above returns all objects from the data table. But the id
>>> is
>>> missing in every object.
>>>
>>> I hope it is clear now.
>>> Maybe my approach is wrong?
>>>
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>> http://drools.46999.n3.nabble.com/Drools-Guvnor-problem-tp3142574p3144308.html
>>> Sent from the Drools: User forum mailing list archive at Nabble.com.
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>>> rules-users mailing list
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>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>
>>
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>
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