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<div class="moz-cite-prefix">Op 03-09-12 13:59, Michiel Vermandel
schreef:<br>
</div>
<blockquote
cite="mid:1346673586.25449.YahooMailNeo@web120102.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:tahoma,
new york, times, serif;font-size:10pt">Hi,<br>
<br>
I'm not keen on spending time on a temp solution if I cannot
estimate - at this time - how much time it will take me to build
it correctly afterwards.<br>
Budgets are limited... (as with anyone I guess :-)<br>
Once again, it gives me a bad feeling that such a simple setup
is giving me such a hard to solve issue.<br>
</div>
</blockquote>
Incremental score calculation isn't a simple concept nor easy to
implement.<br>
But I agree that Drools and Planner should shield you from that
complexity and take the heat there.<br>
Planner already has extensive support to detect score corruption in
incremental score calculation,<br>
and Drools's compensation action looks promising to take greatly
simply the complexity to the user.<br>
<br>
<blockquote
cite="mid:1346673586.25449.YahooMailNeo@web120102.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:tahoma,
new york, times, serif;font-size:10pt">I had thought that -
given the project is only a very few classes - it would be
peanuts for you or any other expert to pinpoint what I'm doing
wrong.<br>
</div>
</blockquote>
I didn't have the time to read all the classes in detail, just
glimpsed over them.<br>
<blockquote
cite="mid:1346673586.25449.YahooMailNeo@web120102.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:tahoma,
new york, times, serif;font-size:10pt"><br>
Non the less... <br>
<br>
I tried to have a look again to a number of examples and I
changed my rules, with a positive result!<br>
I seem to get the correct solution. But... I do not know if my
changes are valid.<br>
I mean, is it possible that I threw a number of possible
solutions away?<br>
Maybe this will not show right now but will have it's effect
when numbers grow and possible solutions shrink.<br>
<br>
So what I did is going from<br>
<br>
rule "tasksInSameJobMustBeInSamePeriod"<br>
when<br>
$taskA : MaintenanceTask($id : id, $jobId : jobId,
$periodId : periodId )<br>
MaintenanceTask(<span style="font-weight: bold;">id !=
$id</span>, jobId == $jobId, <span style="font-weight: bold;">periodId
!= $periodId</span> ) // <============ a != $a<br>
then<br>
System.out.println("r3: " + $taskA );<br>
insertLogical(new
IntConstraintOccurrence("tasksInSameJobMustBeInSamePeriod",
$taskA));<br>
end <br>
<div><br>
<span></span></div>
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><span>to</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><br>
<span></span></div>
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><span>rule
"tasksInSameJobMustBeInSamePeriod"<br>
when<br>
$taskA : MaintenanceTask($id : id, $jobId : jobId,
$periodId : periodId )<br>
</span></div>
</div>
</blockquote>
$taskB:<br>
<blockquote
cite="mid:1346673586.25449.YahooMailNeo@web120102.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:tahoma,
new york, times, serif;font-size:10pt">
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><span>
MaintenanceTask(<span style="font-weight: bold;">id > $id</span>,<br>
</span></div>
</div>
</blockquote>
Good, because if you count the combination task5-task7, you don't
want to count the combination task7-task5 too.<span></span><br>
<blockquote
cite="mid:1346673586.25449.YahooMailNeo@web120102.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:tahoma,
new york, times, serif;font-size:10pt">
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><span>jobId == $jobId, <span
style="font-weight: bold;">periodId > $periodId</span>
) // <================ a > $a<br>
</span></div>
</div>
</blockquote>
Bad, keep this on periodId != $periodId (or even period != $period)<br>
<blockquote
cite="mid:1346673586.25449.YahooMailNeo@web120102.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:tahoma,
new york, times, serif;font-size:10pt">
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><span> then<br>
System.out.println("r3: " + $taskA );<br>
insertLogical(new
IntConstraintOccurrence("tasksInSameJobMustBeInSamePeriod",
$taskA));<br>
</span></div>
</div>
</blockquote>
Add $taskB too:<br>
<span>insertLogical(new
IntConstraintOccurrence("tasksInSameJobMustBeInSamePeriod",
$taskA, $taskB));</span><br>
<blockquote
cite="mid:1346673586.25449.YahooMailNeo@web120102.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:tahoma,
new york, times, serif;font-size:10pt">
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><span>end </span></div>
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><br>
<span></span></div>
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><span>Can you please tell me
if this is THE solution or a dangerous move that works out
now but will give issues when numbers grow?</span><br>
</div>
</div>
</blockquote>
The id > $id change is good, the periodId != $periodId isn't.<br>
<br>
The above fixes could explain score corruption. You no longer get
any exceptions in environmentMode DEBUG or TRACE?<br>
<br>
Keep looking at the examples: they work and they scale.<br>
Keep providing feedback as to the pain points too of course.<br>
<br>
Hope that helps.<br>
<blockquote
cite="mid:1346673586.25449.YahooMailNeo@web120102.mail.ne1.yahoo.com"
type="cite">
<div style="color:#000; background-color:#fff; font-family:tahoma,
new york, times, serif;font-size:10pt">
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><br>
<span></span></div>
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><span>Thanks a lot.</span></div>
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><br>
<span></span></div>
<div style="color: rgb(0, 0, 0); font-size: 13.3333px;
font-family: tahoma,new york,times,serif; background-color:
transparent; font-style: normal;"><span>Michiel<br>
</span></div>
<div> </div>
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</div>
<div style="font-family: tahoma, new york, times, serif;
font-size: 10pt;">
<div style="font-family: times new roman, new york, times,
serif; font-size: 12pt;">
<div dir="ltr"> <font face="Arial" size="2">
<hr size="1"> <b><span style="font-weight:bold;">From:</span></b>
Geoffrey De Smet <a class="moz-txt-link-rfc2396E" href="mailto:ge0ffrey.spam@gmail.com"><ge0ffrey.spam@gmail.com></a><br>
<b><span style="font-weight: bold;">To:</span></b>
Michiel Vermandel <a class="moz-txt-link-rfc2396E" href="mailto:mvermand@yahoo.com"><mvermand@yahoo.com></a>; Rules
Users List <a class="moz-txt-link-rfc2396E" href="mailto:rules-users@lists.jboss.org"><rules-users@lists.jboss.org></a> <br>
<b><span style="font-weight: bold;">Sent:</span></b>
Monday, September 3, 2012 11:56 AM<br>
<b><span style="font-weight: bold;">Subject:</span></b>
Re: Best model for planning? technicians, airplanes and
shifts => insertLogical problems<br>
</font> </div>
<br>
<div id="yiv1855155027">
<div> <br>
<div class="yiv1855155027moz-cite-prefix">Op 03-09-12
11:30, Michiel Vermandel schreef:<br>
</div>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div><span>I did not really start on one example. I
have scrolled through several to try to figure
out how to do it, then started from scratch for
the POJO's and Rules. <br>
</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>The
config file was copies from one of the examples
because it contained too many things that were
hard to get right in the beginning.</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>I
know that is a risk but I needed to start
somewhere.</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><br>
</div>
</div>
</blockquote>
I am thinking how to standardize the getting started
with planner experience.<br>
The cloud balance quick start is the example I pushing
at the moment.<br>
But for specific use case, it's better to start from an
example that's similar to the user's use case.<br>
The trouble is, it's often hard to see which example is
similar and which is not.<br>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span></span></div>
<br>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>3)
What does "The workingMemory has 2
ConstraintOccurrence(s) in excess:" really mean?</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;">
- Are the constraints there more than once?</div>
</div>
</blockquote>
No, it means that in a clean WorkingMemory, those 2
ConstraintOccurrences aren't there,<br>
but in the incremental WorkingMemory, they are there.<br>
So they are in excess: they should have been
automatically retracted by the rule engine, but for some
reason, they are not.<br>
<br>
Read this section about incremental score calculation to
understand why this complexity is needed:<br>
<a class="moz-txt-link-freetext" href="http://docs.jboss.org/drools/release/5.4.0.Final/drools-planner-docs/html_single/index.html#incrementalScoreCalculation">http://docs.jboss.org/drools/release/5.4.0.Final/drools-planner-docs/html_single/index.html#incrementalScoreCalculation</a><br>
<br>
If you just want to prove that a Planner POC works for
now (especially if you're close to giving up),<br>
just take a few minutes to switch to a simple Java score
calculator for now:<br>
<a class="moz-txt-link-freetext" href="http://docs.jboss.org/drools/release/5.4.0.Final/drools-planner-docs/html_single/index.html#d0e3336">http://docs.jboss.org/drools/release/5.4.0.Final/drools-planner-docs/html_single/index.html#d0e3336</a><br>
It will be _much_ slower especially when it scales out
(but it should still be faster than anything you can
invent yourself within reasonable time).<br>
Once that works fine and you get a good result on your
toy problem and you can scale out to 100+ jobs,<br>
then switch back to drools to scale out to 10000+ jobs
and follow the rest of this mail.<br>
<br>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;">
- has this something to do with the equals and
hashcode (which I did implement (see below))?</div>
</div>
</blockquote>
Likely. The equals/hashcode methods are used of all
objects in the causes parameter.<br>
It's a design issue in Planner that the planner entity's
equals/hashcode() needs to be used for the
ConstraintOccurrence's causes.<br>
Compensation action<br>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span><br>
</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span
class="yiv1855155027tab"> </span><span>About
the compensation action: is it already available
on 5.4.0 final? Should I try that?</span></div>
</div>
</blockquote>
The plumbing is there in Drools Expert, but in Planner
there are no decent examples, supporting code or even
complex experiments yet.<br>
It's a minefield, probably best to stay out until I get
it done or you have more Planner experience :/<br>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span><br>
</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>4)
I have been looking to the equals and hashcode,
though found many examples that implement
solutionEquals and solutionHashcode instead.</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>
Currently I implemented them like this:</span></div>
<br>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>
@Override<br>
public int hashCode() {<br>
return id.hashCode(); //(*)<br>
}<br>
<br>
@Override<br>
public boolean equals(Object o) {<br>
if (this == o) {<br>
return true;<br>
}<br>
if (id == null || !(o instanceof
MaintenanceTask)) {<br>
return false;<br>
} else {<br>
MaintenanceTask other =
(MaintenanceTask) o;<br>
return id.equals(<a
moz-do-not-send="true" target="_blank"
href="http://other.id/">other.id</a>);<br>
}<br>
}</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><br>
</div>
</div>
</blockquote>
Looks good<br>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span></span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><br>
</div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>
(*) id is a String property which is passed
into the entity object through the constructor
and upon cloning it is passed from the clone
source to the clone target:</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"> <span
class="yiv1855155027tab"> </span> public
MaintenanceTask clone() {<br>
<span class="yiv1855155027tab"> </span>System.out.println("Cloning
task " + id);<br>
<span class="yiv1855155027tab"> </span>MaintenanceTask
clone = new MaintenanceTask(job, id);<br>
<span class="yiv1855155027tab"> </span>clone.period
= this.period;<br>
<span class="yiv1855155027tab"> </span>clone.technician
= this.technician;<br>
<span class="yiv1855155027tab"> </span>return
clone;<br>
<span class="yiv1855155027tab"> </span>}<br>
<span></span></div>
</div>
</blockquote>
Looks good.<br>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>
<br>
</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span><br>
</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>
I am still confused about:<br>
</span></div>
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>
- Which ones do I need to implement (equals or
solutionEquals, ...)?</span></div>
</div>
</blockquote>
because of this code:<br>
<a moz-do-not-send="true" rel="nofollow"
class="yiv1855155027moz-txt-link-freetext"
target="_blank"
href="https://github.com/droolsjbpm/drools-planner/blob/master/drools-planner-core/src/main/java/org/drools/planner/core/score/constraint/ConstraintOccurrence.java#L54">https://github.com/droolsjbpm/drools-planner/blob/master/drools-planner-core/src/main/java/org/drools/planner/core/score/constraint/ConstraintOccurrence.java#L54</a><br>
which is called by drools on insertLogical inserted
objects (see drools expert manual on insertLogical)<br>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>
- Should an entity and a cloned entity have the
same result for both equals and hashcode? (I
guess so)</span></div>
</div>
</blockquote>
Yes, definitely.<br>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>
- Should only the entity objects have such
implementations? (Planning variables are never
cloned, right?)<br>
</span></div>
</div>
</blockquote>
It looks good. Only the entity's are cloned indeed
during cloneSolution(): they are the only instances that
change during planning.<br>
<blockquote type="cite">
<div
style="color:#000;background-color:#fff;font-family:tahoma,
new york, times, serif;font-size:10pt;">
<div style="color:rgb(0, 0,
0);font-size:13.3333px;font-family:tahoma, new
york, times, serif;
background-color:transparent;font-style:normal;"><span>
</span><br>
</div>
<div> </div>
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<div style="font-family:tahoma, new york, times,
serif;font-size:10pt;">
<div style="font-family:times new roman, new york,
times, serif;font-size:12pt;">
<div dir="ltr"> <font face="Arial" size="2">
<hr size="1"> <b><span
style="font-weight:bold;">From:</span></b>
Geoffrey De Smet <a moz-do-not-send="true"
rel="nofollow"
class="yiv1855155027moz-txt-link-rfc2396E"
ymailto="mailto:ge0ffrey.spam@gmail.com"
target="_blank"
href="mailto:ge0ffrey.spam@gmail.com"><ge0ffrey.spam@gmail.com></a><br>
<b><span style="font-weight:bold;">To:</span></b>
Rules Users List <a moz-do-not-send="true"
rel="nofollow"
class="yiv1855155027moz-txt-link-rfc2396E"
ymailto="mailto:rules-users@lists.jboss.org" target="_blank"
href="mailto:rules-users@lists.jboss.org"><rules-users@lists.jboss.org></a>
<br>
<b><span style="font-weight:bold;">Sent:</span></b>
Monday, September 3, 2012 10:44 AM<br>
<b><span style="font-weight:bold;">Subject:</span></b>
Re: [rules-users] Best model for planning?
technicians, airplanes and shifts =>
insertLogical problems<br>
</font> </div>
<br>
Op 03-09-12 10:21, Michiel Vermandel schreef:<br>
> Hi Geoffrey,<br>
><br>
> Thanks for the support so far.<br>
> I understand that you do not provide full
support on this level.<br>
> Though I have the feeling that this is
really<br>
> - a very basic solution setup<br>
> - a beginners-mistake and since I'm looking
into it now for about 3 days<br>
> (since I started with planner) it seems to
be not obvious to find for a<br>
> beginner.<br>
> So I was trying my luck in offering the
code.<br>
> It could be an opportunity to enrich the
documentation ;-) ;-)<br>
<br>
Good point, the score corruption problem is
often a beginner problem and <br>
it's a PITA. I 'll write some more docs about.<br>
<br>
Do note that your 3 day implementation should be
able to scale out to <br>
10000 planes pretty easily, so hang in there :)<br>
I fear you might have started copying from the
wrong example nqueens (if <br>
you did that) :/ Nurse rostering is a far more
similar to this kind of <br>
problem. I am not sure which example to promote
in the docs: the nqueens <br>
is simple enough to explain things on, but it's
too simple to copy from <br>
for real world stuff :/ Feedback welcome.<br>
<br>
><br>
><br>
> Ok,<br>
><br>
> 1) adding the $t2 results in the same sort
of exception, only<br>
> planningEntity seems different:<br>
><br>
> with insertLogical(new<br>
>
UnweightedConstraintOccurrence("tasksInSameJobMustBeInSamePeriod",
$t1,<br>
> $t2));<br>
><br>
> Exception in thread "main"
java.lang.IllegalStateException: Score<br>
> corruption: the workingScore (-2) is not
the uncorruptedScore (0):<br>
> The workingMemory has 2
ConstraintOccurrence(s) in excess:<br>
>
tasksInSameJobMustBeInSamePeriod/NEGATIVE_HARD:[Maintenance
of<br>
> Boeing 737 - PJ23.I#1 73111693, Maintenance
of Boeing 737 - PJ23.I#2<br>
> 427578167]<br>
>
tasksInSameJobMustBeInSamePeriod/NEGATIVE_HARD:[Maintenance
of<br>
> Boeing 737 - PJ23.I#2 427578167,
Maintenance of Boeing 737 - PJ23.I#1<br>
> 73111693]<br>
> Check the score rules who created those
ConstraintOccurrences. Verify<br>
> that each ConstraintOccurrence's causes and
weight is correct.<br>
> at<br>
>
org.drools.planner.core.score.director.AbstractScoreDirector.assertWorkingScore(AbstractScoreDirector.java:101)<br>
> at<br>
>
org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110)<br>
> at<br>
>
org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:78)<br>
> at<br>
>
org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:63)<br>
> at<br>
>
org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:183)<br>
> at<br>
>
org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:151)<br>
> at<br>
>
be.axi.planner.domain.MaintenancePlanning.main(MaintenancePlanning.java:27)<br>
><br>
> with insertLogical(new<br>
>
UnweightedConstraintOccurrence("tasksInSameJobMustBeInSamePeriod",
$t1));<br>
><br>
> Exception in thread "main"
java.lang.IllegalStateException: Score<br>
> corruption: the workingScore (-2) is not
the uncorruptedScore (0):<br>
> The workingMemory has 2
ConstraintOccurrence(s) in excess:<br>
>
tasksInSameJobMustBeInSamePeriod/NEGATIVE_HARD:[Maintenance
of<br>
> Airbus A350 - XJ34.I#2 778813475]<br>
>
tasksInSameJobMustBeInSamePeriod/NEGATIVE_HARD:[Maintenance
of<br>
> Airbus A350 - XJ34.I#0 225744121]<br>
> Check the score rules who created those
ConstraintOccurrences. Verify<br>
> that each ConstraintOccurrence's causes and
weight is correct.<br>
> at<br>
>
org.drools.planner.core.score.director.AbstractScoreDirector.assertWorkingScore(AbstractScoreDirector.java:101)<br>
> at<br>
>
org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.doMove(DefaultGreedyDecider.java:110)<br>
> at<br>
>
org.drools.planner.core.constructionheuristic.greedyFit.decider.DefaultGreedyDecider.decideNextStep(DefaultGreedyDecider.java:78)<br>
> at<br>
>
org.drools.planner.core.constructionheuristic.greedyFit.DefaultGreedyFitSolverPhase.solve(DefaultGreedyFitSolverPhase.java:63)<br>
> at<br>
>
org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:183)<br>
> at<br>
>
org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:151)<br>
> at<br>
>
be.axi.planner.domain.MaintenancePlanning.main(MaintenancePlanning.java:27)<br>
><br>
><br>
> 2) You suggested to replace
UnweightedConstraintOccurrence with<br>
> IntConstraintOccurrence. I will.<br>
> UnweightedConstraintOccurrence is used in
the very basic Queens example<br>
> though...<br>
<br>
Yep, my mistake.<br>
<br>
><br>
> 3) Where is the best place to read about
what insertLogical and<br>
> IntConstraintOccurrence really do?<br>
> What is the purpose of the Cause -objects,
which should be passed?<br>
> => where is the best place to find
explanation about this?<br>
> (<a moz-do-not-send="true" rel="nofollow"
target="_blank"
href="http://docs.jboss.org/drools/release/5.4.0.Final/drools-planner-docs/html_single/">http://docs.jboss.org/drools/release/5.4.0.Final/drools-planner-docs/html_single/</a><br>
> doesn't really enlighten me on that part)<br>
<br>
Look for "insertLogical" in the Drools Expert
guide:<br>
<br>
<a moz-do-not-send="true" rel="nofollow"
target="_blank"
href="http://docs.jboss.org/drools/release/5.4.0.Final/drools-expert-docs/html_single/index.html">http://docs.jboss.org/drools/release/5.4.0.Final/drools-expert-docs/html_single/index.html</a><br>
<br>
When rules do an insertLogical of an object A,
it's discarded if another <br>
object B in the WorkingMemory equals object A
(through equals() and <br>
through hashcode()). Because the
ConstraintOccurrences need to be unique <br>
so they aren't discarded, they ruleId,
constraintType and causes are <br>
used for equals()/hashcode().<br>
<br>
Future work: "compensation action"<br>
Recently, drools introduced something called
"compensation action",<br>
which can probably replace the use
insertLogical(ConstraintOccurrence) <br>
and make the causes parameter obsolete.<br>
It's also faster.<br>
My first experiments look very promising, but I
haven't got time yet to <br>
experiment with it on all examples and make it
easy for users to use.<br>
<br>
It would allow us to do something like this in
the then part of a rule:<br>
hardAndSoftScoreHelper.addHardScore(-5);<br>
or<br>
hardAndSoftScoreHelper.addSoftScore(- $sum);<br>
or<br>
simpleScoreHelper.addScore(-7);<br>
<br>
No need for causes, insertLogicals, no
equals/hashcode() worries, much <br>
more flexible, ...<br>
<br>
<br>
4) Does your MaintenanceTask implement
equals()/hashcode() other than <br>
Object's original implementation?<br>
<br>
<br>
><br>
> Thanks in advance.<br>
><br>
<br>
yw<br>
<br>
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