Ricardo, This method has recently been added into WorkflowProcessInstance, it is on trunk and will be in CR1. For M5, you could indeed use WorkflowProcessInstanceImpl ... Kris ----- Original Message ----- *From:* Ricardo Gil Alcañiz <rgil(a)okode.com&gt; *To:* Rules Users List <rules-users(a)lists.jboss.org&gt; *Sent:* Monday, March 09, 2009 4:37 PM *Subject:* [rules-users] Re: rules-users Digest, Vol 28, Issue 19 Thanks for your fast response Kris and Michal! I tried to use your solution Kris, but I've found that 5.0.0 M5 WorkflowProcessInstance does not seems to provide getVariable method. I've found that method into WorkflowProcessInstanceImpl searching in svn trunk. I must work with that class or I missed something? Thanks again! Ricardo. > ---------- Mensaje reenviado ---------- > From: Kris Verlaenen <Kris.Verlaenen(a)cs.kuleuven.be&gt; > To: Rules Users List <rules-users(a)lists.jboss.org&gt; > Date: Sun, 8 Mar 2009 03:56:29 +0100 > Subject: Re: [rules-users] Drools Flow, constraint parametrization > Ricardo, > > If you need to access process variables and have only simple constraint > expressions, I suggest you use code constraints (Java or MVEL dialect), > as they have direct access to variables (and globals). > > If you want to use rule constraints anyway (because your constraints can > become rather complex), there are a few options: > > - You cannot use globals to pass information used in your constraints, > because globals are considered immutable with respect to rule conditions > > - You can put your data you want to access in your working memory. > Rule constraints can then access this info just like any normal rule. > > - You access the variable value using the special "processInstance" > rule constraint (I just added a new section in the documentation to > explain): > > Rule constraints do not have direct access to variables defined inside > the process. It is however possible to refer to the current process > instance inside a rule constraint, by adding the process instance to the > working memory and matching to the process instance inside your rule > constraint. We have added special logic to make sure that a variable > "processInstance" of type WorkflowProcessInstance will only match to the > current process instance and not to other process instances in the > working memory. Note that you are however responsible yourself to insert > (and possibly update) the process instance into the session (for example > using Java code or an (on-entry or on-exit or explicit) action in your > process). The following exampleof a rule constraint will search for a > person with the same name as the value stored in the variable "name" of > the process: > > processInstance: WorkflowProcessInstance() > Person( name == ( processInstance.getVariable("name") ) ) > # add more constraints here ... > > Kris > > Quoting Ricardo Gil Alcañiz <rgil(a)okode.com&gt;: > > > Hi, > > > > I'm not a new drools user but I started to test rule flows (5.0M5) > > recently > > and I'm stucked, so any clue will be welcomed :). I'm testing how to > > share a > > StatefulKnowledgeSession between N rule flow instances. I'm trying > > to > > parametrize each instance with process variables at start time but I > > don't > > know how to use them from rule constraints (in event waits, splits, > > etc.). > > I've read the documentation and I've found this text related to > > constraints > > "Both rule and code constraints have access to globals that are > > defined for > > the process and can reuse imports at the process level." I tried it > > assigning (from an action) a variable value to a global variable but > > it's > > not working for me. ¿I'm missing something? > > > > Thanks in advance! > > > > Ricardo. > > > ------------------------------ _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users