Start RHDM
Browse to http://localhost:8080/decision-central
Log in using the appropriate credentials
Select Menu -> Projects
Press the “Import Project” button
Enter the URL “https://github.com/rlucente-se-jboss/myrepo.git”
Select “RHDM Demo” and press the “Ok” button
Wait until all six items are indexed in the project
Press “Create New Asset” then select “Guided Rule”
In the “Create new Guided Rule” dialog, set the “Guided Rule” field to “SpecialHandlingGuidedRule”
Press “Ok+”
To the right of “WHEN”, press “+”
Select “Order ...” and press “+ Ok”
Click the phrase “There is an Order”
In the dialog “Modify constraints for Order”, set “Variable name” to “$o”
Click the phrase “There is an Order”
In the dialog “Modify constraints for Order”, press the “Expression editor” button
Click on “Choose...” to the right of “not bound” and select “orderlines”
Click on “Choose...” to the right of “orderlines.” and select “size()”
Click on “--- please choose ---“ and select “greater than”
Click on the pencil icon to the right of “greater than” and press “Literal value”
Leave the value “0” as is
Add another “WHEN” condition by clicking the “+” sign to the right of the first condition
In the dialog, select “From Accumulate...”
Click on “click to add pattern...” above the line “From Accumulate”
For “choose fact type”, select “Number”
Click “There is a Number” and click on “Expression editor”
To the right of “not bound”, select “intValue()”
Click on “--- please choose ---“, select “greater than”
click the pencil icon to the right of “greater than” and select “Literal value”
Change the value “0” to the right of “greater than” to “100”
Click on “click to add pattern...”
Click the “From” button in the dialog
To the right of “From”, click “Choose...” and select “$o”
Click “Choose...” and select “orderlines”
Click on “(click to add patterns...)” and for “choose fact type” select “OrderLine”
Click on “There is an OrderLine”, and for “Add restriction to a field”, select “quantity”
Click on “quantity” and set “Variable name” to “$q”
Click on “--- please choose ---“ and select “greater than”
Click on the pencil icon to the right of “greater than” and select “Literal value”
Leave the value “0” unchanged
In the box to the right of “Function”, enter “sum($q)”
If you click on “Source” in the sub-menu headings, you’ll see the following source:
package com.redhat.rhdm.demo;
import java.lang.Number;
rule "SpecialHandlingGuidedRule"
dialect "mvel"
when
$o : Order( orderlines.size() > 0 )
Number( intValue() > 100 ) from accumulate ( (OrderLine( $q : quantity > 0 ) from $o.orderlines)
,
sum($q))
then
end
Clicking the “Validate” button at the top of the page will result in a validation error. The reason for the error are extraneous parentheses in the condition:
Number( intValue() > 100) from accumulate( (OrderLine($q : quantity > 0) from $o.orderlines), sum($q))
The Guided Rule editor is not correctly generating DRL.
Bug
Minor