Hello, for the first time I have the need to define a global variables in a DRL file, and from what it seems from the documentation it shall be a variable visible to all my rules in the DRL file.

However I don't see what I do wrong, but the modifications made by one rule are not visible to the others.

Here is illustration of what I have:

[Fact model code]

public class TestPOJO {

private int fieldOne;

private String fieldTwo;

public int getFieldOne() {...}

public void setFieldOne(int fieldOne) {...}

public String getFieldTwo() {...}

public void setFieldTwo(String fieldTwo) {...}

}

[DRL rule code]

global java.lang.Double myGlobal;

rule "Your First Rule"

salience 2

when

TestPOJO(fieldOne > 10)

then

System.out.println("This is rule #1");

System.out.println(myGlobal);

myGlobal = 0.03;

end

rule "Your Second Rule"

salience 1

when

TestPOJO(fieldTwo == "true")

then

System.out.println("This is rule #2");

System.out.println(myGlobal);

end

[Call to Drools]

TestPOJO myTestFact = new TestPOJO();

myTestFact.setFieldOne(15);

myTestFact.setFieldTwo("true");

KieServices ks = KieServices.Factory.get();

KieContainer kContainer = ks.getKieClasspathContainer();

KieSession kSession = kContainer.newKieSession("ksession-rules");

kSession.insert(myTestFact);

kSession.fireAllRules();

kSession.dispose();

[Output]

This is rule #1

null

This is rule #2

null

[What I expect to have as output]

This is rule #1

null

This is rule #2

0.03

I used the salience to set rule order to be sure that rule one is executed before rule two, but my global value is never updated.
Can you please tell me where I do wrong? Can my expectations be met somehow, I need such type of internal rule variables to calculate temporary values and pass them between rules?

Thank you!!!

Best Regards,

Milen