rule engine - Drools : Template for Multiple patterns of same format -

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i have drools rule rule file as:

package com.test  import com.test.fact.feature;  global com.test.course subjects;  rule "cs" when     feature( subjectname=="math", rating >= 6)     feature( subjectname=="computers", rating >= 9)     feature( subjectname=="electronics", rating >= 3)     subjects.addsubjectname("computers"); end  rule "physics" when     feature( subjectname=="math", rating >= 9)     feature( subjectname=="physics", rating >= 9)     subjects.addsubjectname("physics"); end

the patterns in when clause can changed pattern definitions defining subject placed in database table as: patterndefinition (patternname,featurename, featurevalue) patterndefinition table name patternname, featurename , featurevalue columns.

e.g. rule "cs", definitions pattern name "cs" follows:

row 1 -> cs, math, >=9 row 2 -> cs, computers, >=9 row 3 -> cs, electronincs, >=3

i cannot change database tables there huge amount of data , being referred lot of sub-projects.

the definitions particular rule can change new subjects added or if definitions changed (lets rating requirement particular subject changes). these changed in database background.

i required convert above rule drools-template application-startup automatically pick changes in database , prepare drools rule file reading template , database data.

i have been able configure single feature template not multiple in single rule.

please suggest.

a primitive solution define n templates, 1, 2,... n rows per rule/pattern name.

for more intelligent solution 1 need know purpose of these rules. feature name added global list, , why?


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