Function calls in decision table
by San
Hi
I am trying to cal a local function getMaturityAge() in the decision table
condition column like
RuleTable MaturityAge Validation
CONDITION
ACTION
pp:PremiumCalculatorFormBean
getMaturityAge() > "$1"
System.out.println("invalid maturity age");
Premium Payment Term Print out
message?
70 X
The method is defined localy using functions key word.
And moreover whenever I trying to pass pp as the argument to my functions,
its not able to find pp. I am getting cud not parse knowledge error.
can anyone pz help me out.
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14 years
custom lib in guvnor
by Olle Martensson
How can I use a custom lib/jar in guvnor.
What I want to do is to call some framework specific methods from the action part of the rules.
Thanks! // Olle
14 years
Challenge! Using javassist and drools presents an issue with drl
by markricard
In order to make writing drl files easy and not requiring writers to be
developers, I have written some JavaAssist code that dynamically creates a
subclass and new methods in memory.
If for example there is a REAL java class called 'com.foo.Instance'. Via
javasssist, I create a new in-memory subclass called 'com.foo.InstanceEx'.
The new class dynamically creates a new getter called getFoo(). The drl
writer would like to directly reference 'foo' in the drl file like so:
when
i : Instance(foo == 'fee')
The problem is, in order to reference foo, I would need the drl file to do
this:
import com.rrd.xspace.drools.InstanceEx;
But I cannot do that because InstanceEx does not exist at runtime. The
error I get, which is an obvious one, is "Unable to create Field Extractor
for 'foo' of '[ClassObjectType class=com.foo.Instance]' in rule 'Test' :
[Rule name='Test']"
Is there a way to include a dynamic import of a JavaAssist class while I am
constructing the KnowledgeBase instances to run the rules so that I can
reference that new method?
I would hope to have something similar to:
KnowledgeBuilder kbuilder = ....
kbuilder.addImport("com.foo.InstanceEx")
or
kbuilder.addClass(Class.forName("com.foo.InstanceEx"))
Any help GREATLY appreciated.
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14 years
Why is solving a partial puzzle much slower than generating one from scratch?
by aitchnyu
I am making a 3x3 Sudoku solver with Drools planner. The planning entities
are the digits. The problem facts are the rows (planning variable) and
columns.
When I set Drools Planner to solve a problem where no digit is initialized,
it gives a perfect solution in ~15 secs. But when I set a few digits as
initialized, it never finds a solution. It always lists 8 hard constraints
broken on termination.
I implemented the moves as:
if(digit.getFixed()==false){
moveList.add(new RowChangeMove(digit, toRow));
}
If the digit is fixed, dont make a move object for it.
Earlier, I implemented it in isMoveDoable: if the digit.getFixed() is true,
it returns false. Both do not work.
20:31:13.442 [main] INFO o.d.p.c.l.DefaultLocalSearchSolverPhase - Phase
local search finished: step total (978), time spend (60061), best score
(-8).
20:31:13.442 [main] INFO o.d.p.core.solver.DefaultSolver - Solved: time
spend (60061), best score (-8), average calculate count per second (7433).
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14 years
Help
by seagull
Hi everyone,
I am new to drools.net and I am testing some basic commands but can't seem
to find help anywhere! I am trying to print the contents of a variable but
for some reason, the contents are not printed! The first line (i.e. hello)
on the other hand is being printed.. Is there a common mistake I may be
doing?
Thanks!
rule "testing"
when
p: Person (name == "john")
then
Console.WriteLine ("hello");
Console.WriteLine (p.name);
end
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14 years
using Drools global variables inside operator timer(int: <variable name> s)
by skatta1986
Hi,
I want a global variable inside a timer instead of hard coding.
-------------------------------------------------
ksession.setGlobal( "timeout", new Integer(10));
---------------------------------------
*
Improper (not working) rule: *
global Integer timeout;
rule "tmeout case"
timer( int: timeout.intValue() s )
when
$request : EventRecord(eventType == "EVENT_REGISTER", user ==
"katta") from entry-point "AggStream"
and not (EventRecord( eventType == "EVENT_RESPONSE", ", user ==
"katta", this after[ 0s, 10s ] $request ) from entry-point "AggStream")
then
System.out.println("-- timeout for user : "+ $request.getUser() );
end
------------------------------------------------------
This new rule doesn't give any error but it is giving unexpected result.
For example if a fire only one EventRecord(eventType == "EVENT_REGISTER",
user == "katta") into the working memory, then after 10seconds I should get
timeout as per my requirement.
But for the above rule as soon as I fire the EventRecord it is giving as
timeout.
Please help me in this regard
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14 years
Guvnor data enumeration issue
by GPatel＠tsys.com
I am trying to use data enumerations and running into a problem. Following
the Vehicle engineType/fuelType data enumeration example in the Guvnor
manual, I created the following enumeration list and it works:
'Vehicle.engineType' : (new test.VehicleHelper()).getEngineTypes()
'Vehicle.fuelType[engineType]' : '(new
test.VehicleHelper()).getFuelTypes("@{engineType}")'
VehicleHelper:
------------
public class VehicleHelper {
public List<String> getEngineTypes(){
List<String> engineTypes = new ArrayList<String>();
engineTypes.add("Petrol");
engineTypes.add("Diesel");
return engineTypes;
}
public List<String> getFuelTypes(String engineType){
List<String> fuelTypes = new ArrayList<String>();
if("Petrol".equalsIgnoreCase(engineType)){
fuelTypes.add("ULP");
fuelTypes.add("PULP");
}
else if("Diesel".equalsIgnoreCase(engineType)){
fuelTypes.add("BIO");
fuelTypes.add("NORMAL");
}
else{
fuelTypes.add("Default Fuel 1");
fuelTypes.add("Default Fuel 2");
}
return fuelTypes;
}
}
Above works as expected.
Problem:
I want to only have an enumeration on Vehicle.fuelType that depends on the
value of engineType, without specifying an enumeration on engineType. So,
I took out the first line in my enumeration list so that it is now:
'Vehicle.fuelType[engineType]' : '(new
test.VehicleHelper()).getFuelTypes("@{engineType}")'
But that does not work. When I create a rule, VehicleHelper.getFuelTypes
does not get called and the dropdown for fuelType is not a list.
How do I get this working?
Thanks
G. Patel
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14 years, 1 month
Getting Error while using Drools 5.3.0
by mkhan_rt54fde
Hi,
My application works fine with Drools v 4.0.7. However, when I run my
application using Drools 5.3.0, I am getting the following error:
org.drools.rule.InvalidRulePackage: Evaluator '>' does not support type
'ValueType = 'String' : [Rule name='VIN required for newer vehicles']
at org.drools.rule.Package.checkValidity(Package.java:478)
at
org.drools.common.AbstractRuleBase.addPackages(AbstractRuleBase.java:481)
at org.drools.reteoo.ReteooRuleBase.addPackages(ReteooRuleBase.java:458)
at org.drools.reteoo.ReteooRuleBase.addPackage(ReteooRuleBase.java:465)
Here is the condition I am using in my .dsl file:
[condition][]request contains no VIN and the car was built after year
{value}=info: CarRulesInfo(quoteRequest.VIN == null, quoteRequest.modelyear
> 1982 )
Any suggestions on how to fix this problem.
Thanks in advance.
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14 years, 1 month
