3:26 a.m.
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
DepartmentAssignment and planning variable Employee. The planning entity
class looks like this:
@PlanningEntity(difficultyComparatorClass =
DepartmentAssignmentDifficultyComparator.class)
@XStreamAlias("DepartmentAssignment ")
public class DepartmentAssignment extends AbstractPersistable{
private Duration duration; // per month
private Department department;
//Planning variable : changes during planning, between score calculations.
private Employee employee;
How can I make such rule? I tried using this but it seems not working. Am i
missing something?
rule "minimumNumberofMonths"
when
$employee : Employee()
$department : Department()
$assignedNumberOfMonths : Number(intValue > 0 && < 3) from accumulate(
$assignment: DepartmentAssignment(
employee!= null,
department== $department,
employee== $employee
), count($assignment)
)
then
insertLogical(new IntConstraintOccurrence("minimumNumberofMonths",
ConstraintType.NEGATIVE_HARD,
1,
$employee, $department));
end
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4:08 a.m.
Do you have one DepartmentAssignment fact object per employee and
department AND month of the calendar?
-W
On 11/11/2013, newbie <dspecialist18(a)yahoo.com> wrote:
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
DepartmentAssignment and planning variable Employee. The planning entity
class looks like this:
@PlanningEntity(difficultyComparatorClass =
DepartmentAssignmentDifficultyComparator.class)
@XStreamAlias("DepartmentAssignment ")
public class DepartmentAssignment extends AbstractPersistable{
private Duration duration; // per month
private Department department;
//Planning variable : changes during planning, between score calculations.
private Employee employee;
How can I make such rule? I tried using this but it seems not working. Am i
missing something?
rule "minimumNumberofMonths"
when
$employee : Employee()
$department : Department()
$assignedNumberOfMonths : Number(intValue > 0 && < 3) from
accumulate(
$assignment: DepartmentAssignment(
employee!= null,
department== $department,
employee== $employee
), count($assignment)
)
then
insertLogical(new IntConstraintOccurrence("minimumNumberofMonths",
ConstraintType.NEGATIVE_HARD,
1,
$employee, $department));
end
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5:32 a.m.
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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7:45 a.m.
This isn't an answer to my question. If you have just one
DepartmentAssignemnt for each pair of Employee and Department (no
matter what the duration is), it will not give you a count > 1.
If you do have more than one DepartmentAssignemnt for each pair of
Employee and Department: are they different? In which way?
-W
On 11/11/2013, newbie <dspecialist18(a)yahoo.com> wrote:
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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10:13 p.m.
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]
[DepartmentAssignment4] 05-01-2013 to 05-31-2013 -> [Employee-1] to
[Department1]
[DepartmentAssignment5] 06-01-2013 to 06-30-2013 -> [Employee-1] to
[Department1]
[DepartmentAssignment6] 07-01-2013 to 07-31-2013 -> [Employee-1] to
[Department1]
[DepartmentAssignment7] 08-01-2013 to 08-31-2013 -> [Employee-1] to
[Department1]
[DepartmentAssignment8] 01-01-2013 to 01-31-2013 -> [Employee-1] to
[Department2] // should be set to null minimum assignment should be 3 months
[DepartmentAssignment9] 02-01-2013 to 02-28-2013 -> null to [Department2]
[DepartmentAssignment10] 03-01-2013 to 03-31-2013 -> null to [Department2]
[DepartmentAssignment11] 04-01-2013 to 04-30-2013 -> null to [Department2]
[DepartmentAssignment12] 05-01-2013 to 05-31-2013 -> null to [Department2]
[DepartmentAssignment13] 06-01-2013 to 06-30-2013 -> null to [Department2]
[DepartmentAssignment14] 07-01-2013 to 07-31-2013 -> null to [Department2]
The rule I have made seems not counting it well.
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Wolfgang Laun