10:14 a.m.
How do i load & execute specific rules in my drl file? For ex.,
I have 5 rules defined in rules.drl
rule "1"
when
cond #1
then
System.out.println("Applying Rule 1");
end
rule "2"
when
cond #2
then
System.out.println("Applying Rule 2");
end
rule "3"
when
cond #3
then
System.out.println("Applying Rule 3");
end
rule "4"
when
cond #4
then
System.out.println("Applying Rule 4");
end
rule "5"
when
cond #5
then
System.out.println("Applying Rule 5");
end
From my Java class, based on some conditions, i should call the
respective rules.
public void CheckRules(){
if (some Condition){
// Execute rule1, rule2
}else if (some Condition){
// Execute rule1, rule3
}else if (some Condition){
// Execute rule3, rule5
}else if (some Condition){
// Execute rule1,rule2,rule3,rule5
}
}
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromDrl(new
InputStreamReader(FieldValidation.class.getResourceAsStream("/BizRules.drl")));
RuleBase rulebase = RuleBaseFactory.newRuleBase();
rulebase.addPackage(builder.getPackage());
WorkingMemory workingMemory = rulebase.newWorkingMemory();
workingMemory.assertObject(object1);
workingMemory.assertObject(object2);
workingMemory.fireAllRules(new RuleNameEqualsAgendaFilter("1"));
workingMemory.clearAgenda();
WorkingMemory workingMemory1 = rulebase.newWorkingMemory();
workingMemory1.assertObject(object1);
workingMemory1.assertObject(object2);
workingMemory1.fireAllRules(new RuleNameEqualsAgendaFilter("2"));
Is there any way by which we can add specific rules to the Agendafilter and call
fireAllRules() with the rulelist as parameter.
6:54 p.m.
Rules are not functions, they cannot be called, they execute in response
to changes in the working memory.
Mark
Raja.Bobbala(a)sanofi-aventis.com wrote:
How do i load & execute specific rules in my drl file? For ex.,
I have 5 rules defined in rules.drl
*rule* "1"
* when*
cond #1
* then*
System.out.println("Applying Rule 1");
*end*
*rule* "2"
* when*
cond #2
* then*
System.out.println("Applying Rule 2");
*end*
*rule* "3"
* when*
cond #3
* then*
System.out.println("Applying Rule 3");
*end*
*rule* "4"
* when*
cond #4
* then*
System.out.println("Applying Rule 4");
*end*
*rule* "5"
* when*
cond #5
* then*
System.out.println("Applying Rule 5");
*end*
From my Java class, based on some conditions, i should call the
respective rules.
public void CheckRules(){
if (some Condition){
// Execute rule1, rule2
}else if (some Condition){
// Execute rule1, rule3
}else if (some Condition){
// Execute rule3, rule5
}else if (some Condition){
// Execute rule1,rule2,rule3,rule5
}
}
PackageBuilder builder =* new* PackageBuilder();
builder.addPackageFromDrl(*new*
InputStreamReader(FieldValidation.*class*.getResourceAsStream("/BizRules.drl")));
RuleBase rulebase = RuleBaseFactory./newRuleBase/();
rulebase.addPackage(builder.getPackage());
*/WorkingMemory workingMemory = rulebase.newWorkingMemory(); /*
workingMemory.assertObject(/object1/);
workingMemory.assertObject(/object2/);
workingMemory.fireAllRules(*new* RuleNameEqualsAgendaFilter("1"));
workingMemory.clearAgenda();
*/WorkingMemory workingMemory1 = rulebase.newWorkingMemory();/*
workingMemory1.assertObject(/object1/);
workingMemory1.assertObject(/object2/);
workingMemory1.fireAllRules(*new* RuleNameEqualsAgendaFilter("2"));
Is there any way by which we can add specific rules to the
Agendafilter and call fireAllRules() with the rulelist as parameter.
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7:29 a.m.
How do i load & execute specific rules in my drl file?
Raja,
As Mark indicated, it appears that you are misunderstanding how JBoss Rules
(drools) should be used. Your example seems to indicate that you would place
"execution flow" logic in Java and simply call the "appropriate" rule
from your
Java class. This is a sub-optimal solution as it does not use the power of JBoss
Rules effectively. Look at the documentation for "conflict resolution",
salience, and activation groups to understand how to impact execution flow.
That being said, following is a response to your actual questions.
The only way I've found to load specific rules is to define each rule (or group
of rules) in a separate .drl file and implement logic that loads only the rules
you need/want.
The concept of "Agenda Groups" and "Agenda Filters" can be used at
runtime to
partition rules such that only specific rules fire during a given execution. The
following link to the JBoss Rules 3.0.5 documentation describes the use of
Agenda Groups/Filters.
http://labs.jboss.com/file-access/default/members/jbossrules/freezone/doc...
Enjoy,
Bree
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days inactive
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2 comments
3 participants
participants (3)
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Bree -
Mark Proctor -
Raja.Bobbala＠sanofi-aventis.com