Function libraries

When uploading rules files, TMS offers the functionality to declare those as libraries. The following example shows a function which just calculates the average of 2 number:

package com.peaksolution.tms.drools.activity.test

import java.math.BigDecimal

function BigDecimal calcAverage(Long pMin, Long pMax)
{
    return BigDecimal.valueOf((pMin + pMax)  / 2);
}

When registering the file in TMS it is important to activate the library checkbox:

Declaring code snippet as library

This function can than be used in another file:

package com.peaksolution.tms.drools.activity.test

import com.peaksolution.rules.model.Activity;

global Validator validator;
global SessionContext sessionContext;

rule "Set average temperature"
    when
        $attrTempMin: Attribute(name == "TEMP_MIN", getValueAsLong() != null)
        $attrTempMax: Attribute(name == "TEMP_MAX", getValueAsLong() != null)
        $attrTempAvg: Attribute(name == "TEMP_AVG")
        
    then
            $at-trTempAvg.setValueAsDecimal(calcAverage($attrTempMin.getValueAsLong(), 
                                                       $attrTemp-Max.getValueAsLong()));
end

info

To use a function of a rule set file both files, the file with the function and the file using the function need to have the same package declaration!