Hi,

I have a Map object that maps User product type experience with the level of expertise. I am trying to use accumulate in my rule

Such that if the user has experience with certain product then it gets the experience level and sums it up .

I am using Drools 5.1 , mvel 2, spring batch 2.x.

This is my rule :-

 

rule "Insert Product Types"

dialect "mvel"

salience 1800

when

    eval (true)

then

    ProductType p1 = new ProductType();

    p1.setName("P1");

    ProductType p2 = new ProductType();

    p2.setName("P2");

    insert (p1);

    insert (p2);

end

 

 

rule "Product Class Experience"

dialect "mvel"

salience 1600

when

    ProductType ($name : name)

    $total : Number () from accumulate (

                       Client (productExperience.keySet contains $name, $score : productExperience[$name]),

                        sum($score))

  then

    System.out.println ("Product Type Score " + $total);

 

End

 

When the rule is fired I get the attached exception .

 

Any suggestions / help will be great.

Regards,

Akash

 

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