[rules-users] priority based on object properties

[Simon Chen]

I think it works.

Actually, just found it in the current Drools expert documentation
too. Shame on me...

Thanks.
-Simon

2011/7/18 Michael Anstis <michael.anstis at gmail.com>:
> I believe this
> http://blog.athico.com/2007/05/dynamic-salience-expressions.html still
> works.
>
> On 18 July 2011 20:44, Simon Chen <simonchennj at gmail.com> wrote:
>>
>> Hi all,
>>
>> I am curious if we can inform Drools' execution based on properties
>> within objects.
>>
>> In particular, the salience value is defined for each rule, in the
>> sense that rule A has priority over rule B to execute. I am wondering
>> if we can define some kinda of salience metric, such that object X has
>> higher priority than object Y to be executed in the same rule.
>>
>> To give an example, I am (still) playing with implementing shortest
>> path using a few rules. I have a rule for selecting a shortest path on
>> a node (among all the paths received from its neighbors) to a source
>> node, and another rule for propagating the shortest path on a node to
>> neighboring nodes. When I have many nodes in my graph, I found that
>> the paths propagated (via the second rule) are not always the
>> shortest, while Dijkstra's algorithm always "propagate" from the node
>> with the shortest distance to the source. The effect is that my rules
>> are wasting most of the time propagating paths that would be dropped
>> in the end anyway...
>>
>> Any ideas?
>>
>> Thanks.
>> -Simon
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