These are some of the differences between variables and globals: - You can make inference about your globals using rules - Variables are persisted as part of the process instance info. Globals are not. - I didn't test it in every node type, but at least in Script Tasks, you can access process variables using just its name.
Best Regards, XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX Esteban Aliverti - Developer @ http://www.plugtree.com - Blog @ http://ilesteban.wordpress.com On Wed, Apr 13, 2011 at 8:39 AM, gs76pl <[email protected]> wrote: > hi, > > this seems like a basic question i should know the answer to after reading > some documentation but unfortunately after doing some tests with > onExitActions there seems to be some discrepancy between what doc reads and > how the process/action behaves. Could anyone verify my observations: > > 1. while documentation in "4.4. Data" reads "...Actions can access > variables > directly, simply by using the name of the variable as a parameter name" in > fact this is INCORRECT as at that point actions expect a global object to > be > in the session!! e.g. below code in onExitAction throws an exception if > tracker obj hasn't been defined as a global variable and entered into the > session (it doesn't matter that the process has tracker variable defined) > > tracker.addVisitedNode("dasdf"); > > 2. the only way of accessing process variables is via context object as > below > > context.getVariable("tracker") > > 3. inserting/updating object in the session can be done > a) context.getKnowledgeRuntime().insert("myFact"); > b) insert("myFact"); > > looks like there is no difference here and the second one is simple a > shorter version of doing the same > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/what-is-the-difference-between-process-variable-global-variables-tp2815658p2815658.html > Sent from the Drools: User forum mailing list archive at Nabble.com. > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users >
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