[rules-users] Why a split node constraint always is true.

[Kris Verlaenen]

Note that you must inform the engine if you change a fact in the working
memory (so that engine knows to re-evaluate rules if necessary).  So
after changing the user object, you should also call update(user);

Kris

Quoting liuzhikun <liuzhikun at viewhigh.com.cn>:

> Fllow rule flow split node toNodeId=2 always is true.Please help me.
> 
> <process >
>  <header>
>   <imports>
>    <import name="t2.state.User"/>
>   </imports>
>   <variables>
>     <variable name="user" >
>       <type
> name="org.drools.process.core.datatype.impl.type.ObjectDataType"
> className="User" />
>     </variable>
>   </variables>
>  </header>
>  
>  <nodes>
>   <start id="1" name="Start"/>
>   <join id="2" name="Restart" type="2"/>
>   <actionNode id="3" name="changeAge">
>    <action type="expression" dialect="mvel">System.out.println("age:
> "+user.age);System.in.read();user.age+=1;</action>
>   </actionNode>
>   <split id="4" name="decide" type="2">
>    <constraints>
>     <constraint toNodeId="2" toType="DROOLS_DEFAULT" name="go to
> rest" type="rule" priority="1" dialect="mvel">User(age &lt;
> 3)</constraint>
>     <constraint toNodeId="100" toType="DROOLS_DEFAULT" name="go to
> end" type="rule" priority="2" dialect="mvel">eval(true)</constraint>
>    </constraints>
>   </split>
>   <end id="100" name="End"/>
>  </nodes>
>  
>  <connections>
>   <connection from="1" to="2"/>
>   <connection from="2" to="3"/>
>   <connection from="3" to="4"/>
>   <connection from="4" to="2"/>
>   <connection from="4" to="100"/>
>  </connections>
>  
> </process>
> 
> 
> 
> 
> liuzhikun
> 2009-10-30
> 




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