[jboss-jira] [JBoss JIRA] (DROOLS-1624) Map Handling with Property Reactive Always Enabled

[Mario Fusco (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-1624?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Mario Fusco updated DROOLS-1624:
--------------------------------
    Sprint: 2017 Week 24-25


> Map Handling with Property Reactive Always Enabled
> --------------------------------------------------
>
>                 Key: DROOLS-1624
>                 URL: https://issues.jboss.org/browse/DROOLS-1624
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 7.0.0.Final
>         Environment: * JDK8
> * Docker running Alpine
>            Reporter: KimJohn Quinn
>            Assignee: Mario Fusco
>            Priority: Minor
>
> Referencing a conversation on [Google Groups - Drools Usage|https://groups.google.com/forum/?fromgroups#!topic/drools-usage/G7rlz3oI1HQ] and as requested by Mario Fusco...
> We currently have a ruleset that relies heavily on Map facts.  In Drools 6.5 we fire approximately 400 rules.  
> In Drools 7.0 we get only about 50 rules unless we add the "<property key="drools.propertySpecific" value="ALLOWED"/>" to the kmodule.xml, in which case we fire the full 400 rules or by using @Watch(*) or @Watch(!*) on the rules.  It "seems" like only the first evaluations of the rules are firing and then no others after that.
> Our flow generally follows something like below, within a stateful session, using rules only.  We fire all rules per-request then close the session.
> Watch for changes to the Map properties
> If a certain property or properties exist a 'populate' rule fires (calls modify())
> The populate rule enriches the map fact. (calls modify())
> Based on #3, more rules fire when certain properties exist (calls modify())
> We are work heavily with rules that depend on loaded available facts up-front and computed properties throughout evaluation.  
> I have a couple of usage questions regarding Drools 7, the default enabling of Property Reactive and using Maps as the facts:
> In general, how do maps work with property reactive and respond to modify/insert events?  Does Drools look at the Map as a whole, any change re-evaluates the tree, or each individual property within the map re-evaluates the change?
> In Drools 7, by defaulting the property reactive setting, does that mean all rules need to be annotated or they should they work as is (dao or map-based facts) when using modify/insert?
> For reference, we are relying on this doco https://docs.jboss.org/drools/release/7.0.0.Final/drools-docs/html_single/index.html#_fine_grained_property_change_listeners.
> I am looking into details or an example how to properly use Maps in Drools 7 with Property Reactive features always enabled (as suggested per the doco)....



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