Red Hat Summit Red Hat SummitSupportConsoleDéveloppeursCommencer un essaiContact

Ce contenu n'est pas disponible dans la langue sélectionnée.

14.3. Using rules from a jBPM process definition

A rule base can act as a jBPM action, decision, or assignment handler in either a pageflow or a business process definition. 
<decision name="approval">         
  <handler class="org.jboss.seam.drools.DroolsDecisionHandler">
    <workingMemoryName>orderApprovalRulesWorkingMemory</workingMemoryName>
    <assertObjects>
      <element>#{customer}</element>
      <element>#{order}</element>
      <element>#{order.lineItems}</element>
    </assertObjects>
  </handler>
    
  <transition name="approved" to="ship">
    <action class="org.jboss.seam.drools.DroolsActionHandler">
      <workingMemoryName>shippingRulesWorkingMemory</workingMemoryName>
      <assertObjects>
        <element>#{customer}</element>
        <element>#{order}</element>
        <element>#{order.lineItems}</element>
      </assertObjects>
    </action>
  </transition>  
  <transition name="rejected" to="cancelled"/> 
</decision>
Copy to Clipboard Toggle word wrap
The <assertObjects> element specifies EL expressions that return an object or collection of objects to be asserted as facts into the WorkingMemory.
Using Drools for jBPM task assignments is also supported: 
<task-node name="review">
  <task name="review" description="Review Order">
    <assignment handler="org.jboss.seam.drools.DroolsAssignmentHandler">
      <workingMemoryName>
        orderApprovalRulesWorkingMemory
      </workingMemoryName>
      <assertObjects>
        <element>#{actor}</element>
        <element>#{customer}</element>
        <element>#{order}</element>
        <element>#{order.lineItems}</element>
      </assertObjects>
    </assignment>
  </task>
  <transition name="rejected" to="cancelled"/>
  <transition name="approved" to="approved"/>
</task-node>
Copy to Clipboard Toggle word wrap
Certain objects are available as Drools globals — the jBPM Assignable is available as assignable, and the Seam Decision object is available as decision. Rules that handle decisions should call decision.setOutcome("result") to determine the decision result. Rules that perform assignments should set the actor ID with Assignable. 
package org.jboss.seam.examples.shop
import org.jboss.seam.drools.Decision 
global Decision decision 
rule "Approve Order For Loyal Customer" 
  when 
    Customer( loyaltyStatus == "GOLD" ) 
    Order( totalAmount <= 10000 ) 
  then 
    decision.setOutcome("approved"); 
end
Copy to Clipboard Toggle word wrap 
package org.jboss.seam.examples.shop 
import org.jbpm.taskmgmt.exe.Assignable 
global Assignable assignable 
rule "Assign Review For Small Order" 
  when 
    Order( totalAmount <= 100 ) 
  then 
    assignable.setPooledActors( new String[] {"reviewers"} ); 
end
Copy to Clipboard Toggle word wrap

Note

More information about Drools is available at http://www.drools.org.

Important

Seam comes packaged with enough Drools dependencies to implement some simple rules. To add extra capabilities, download the full Drools distribution and add extra dependencies as required.
Retour au début
Red Hat logoGithubredditYoutubeTwitter

Apprendre

Essayez, achetez et vendez

Communautés

À propos de la documentation Red Hat

Nous aidons les utilisateurs de Red Hat à innover et à atteindre leurs objectifs grâce à nos produits et services avec un contenu auquel ils peuvent faire confiance. Découvrez nos récentes mises à jour.

Rendre l’open source plus inclusif

Red Hat s'engage à remplacer le langage problématique dans notre code, notre documentation et nos propriétés Web. Pour plus de détails, consultez le Blog Red Hat.

À propos de Red Hat

Nous proposons des solutions renforcées qui facilitent le travail des entreprises sur plusieurs plates-formes et environnements, du centre de données central à la périphérie du réseau.

Theme

© 2025 Red Hat