[rules-users] priority based on object properties

[Michael Anstis]

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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