Re: [rules-users] Why a split node constraint always is true.
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(a)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 <
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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