I am new user of drools and I'm trying to recreate an application similar to
nurse rostering. This time assigning an employee to a department for a
specific period of time. My hard constraint was an employee must be assigned
to a department at least 3 months. My planning entity is
DepartmentAssignm
Yes I have, each of my planning entity DepartmentAssignemnt has Department,
Duration, and Employee Object. Employee is my planning variable and I
configure it to be nullable.
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Sample output would be:
[DepartmentAssignment1] 02-01-2013 to 02-28-2013 -> [Employee-1] to
[Department1]
[DepartmentAssignment2] 03-01-2013 to 03-31-2013 -> [Employee-1] to
[Department1]
[DepartmentAssignment3] 04-01-2013 to 04-30-2013 -> [Employee-1] to
[Department1]
[DepartmentAssignme
According to Drools 5.5 reference doc "Nullable planning variables are not
supported for construction heuristics in 5.5.x or lower." I cannot config
the planning variable to be null using drools 5.5?
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I am currently using optaplanner 6.0.0.CR5, I have about 11000 planning
entity objects and about 1000 planning variable objects. Would that be the
cause of this problem?
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Here's the stacktrace:
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at
org.drools.core.base.accumulators.JavaAccumulatorFunctionExecutor.createContext(JavaAccumulatorFunctionExecutor.java:81)
at org.drools.core.rule.Accumulate.createContext(Accumulate.java
I have figured it out that this rule is the reason for the out of memory
error. Basically it counts the number of months assigned to a resource per
requirement and it should be a minimum of 3 months.
rule "minimumMonths"
when
$requirement : Requirement()
$employee: Employee()
My example was I have 1000 employees and 1000 requirement. Each requirement
has duration of 10 months. The number of assignment therefore would be
number of months of requirment * number of requirement all in all 1
assignments.
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I am using 6.0.0CR5. I configure the planning variable to be null. Now using
the construction heuristic
FIRST_FIT
FIRST_NON_DETERIORATING_SCORE
all the planning entities was assigned with a planning variable even if the
assignment lead to a negative hard constraint. I assum
I created a custom solver which assign planning variables to planning
entities. I have a simple rule checking if there are no assign variable
that adds negative soft constraint. But when I assigned my planning variable
it increases the negative score instead of reducing it. I have for example
12 e
Yes I am using now the latest version 6.0.0.Final.
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__
I am currently using final 6.0 and I used
BEST_FIT but after I
have run it propmts java.lang.NullPointerException pointing to my
PlanningVariableStrengComparator. Did I miss something? My planning variable
comparator by the way is :
public class MyVariableStrengthComparator implements Comparator,
Exception in thread "main" java.lang.NullPointerException
at
com.example.domain.solver.MyVariableStrengthComparator.compare(MyVariableStrengthComparator.java:30)
at
com.example.domain.solver.MyVariableStrengthComparator.compare(MyVariableStrengthComparator.java:1)
at java.ut
Hello,
Actually I want to do the same way Sandeep has described.
1. Can someone please post some example to generate the drl from template?
2.This thread is more than a 1 1/2 year old. Does drools have in-built
template concept now instead of using a template langauge such
velocity, freemarker o
tions are f3='c' or f4='d' in db.
how can I create rules programmatically and feed into rule engine?
Please provide some guidance with examples?
Thanks again.
Mark Proctor wrote:
>
> drools newbie wrote:
>> Hello,
>> Actually I want to do the same way Sa
Thanks again Mark.
If anyone had done this before, Please share your ideas.
If not, drools experts, Please give me some idea how we can do this. Since
I'm new to drools, I'm not sure where to start. I have short deadline.
Thanks in advance.
Mark Proctor wrote:
>
> dro
he rules from db which is in GUI friendly format,Will
> it
> be easy to convert that to java rules or drools native language?
>
> [Vikrant] Drools can be written in XML or English. For the GUI, you could
> use XML rather than create your own language and let drools compile things
> au
Hello,
I would like to store rule entry in my database while using Guvnor. So
whenever any rule is added/removed from Guvnor, I want to add/remove the
same from database table. Is this possible?
Is there any event handler called in Guvnor while adding/removing rules?
Please clarify.
Thanks.
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Hello,
I'm having the same problem as given in below link and tried same solution.
but no luck. I'm using drools 5.0. MR2 in eclipse 3.4.0. Please help.
http://lists.jboss.org/pipermail/rules-users/2008-June/005974.html
Thank You!
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ok thanks. Is there any temporary fix for now?
Mark Proctor wrote:
>
> could be a bug, we'll double check this for M3.
>
> Mark
> drools newbie wrote:
>> Hello,
>> I'm having the same problem as given in below link and tried same
>> solution.
&
Hello,
Is there way to call some java code (that interacts with application db)
from Guvnor whenever we add or change rule from Guvnor editor? Please
clarify.
Thanks
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patch do you have a
> preference as to how it would work? On save, call a url with the rule
> name? What are your needs for this?
>
>
>
> -Michael Rhoden
>
>
> - Original Message -
> From: "drools newbie" <[EMAIL PROTECTED]>
> To: rules-u
Hello,
I followed the instructions given in
http://www.jboss.org/community/docs/DOC-10130. But getting following error.
Please someone help.
INFO: Deploying web application archive mydrools-guvnor.war
Oct 28, 2008 9:48:24 AM org.apache.catalina.core.StandardContext start
SEVERE: Error listenerSt
Hello,
Came across this link
http://docs.codehaus.org/display/DROOLS/Loading+and+managing+rules+dynamically+from+a+database
when I was looking for how to load rules from database. If I understand
correctly, we can't add java conditions dynamically in the database rather
use python script if we wan
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