7:18 a.m.
Hello All,
I am having some basic problems with how my rule file is working. Any help
regarding this will be greatly appreciated.
My rule is as follows:
rule "Rating"
when
m : method()
then
System.out.println("Rating inserted as: "+ m.getid() + " and rating:
" +
m.getRating());
end
In my main java file, I am calling in the main method:
insertRating(101, 1.0);
insertRating(102, 1.0);
ksession.fireAllRules();
The definition of insertRating is as below:
public void insertRating(int mid, double d)
{
RatingMessage msg = new RatingMessage(mid,d);
ksession.insert(msg);
}
My expectation is that 2 different ksession objects will be created and when
fireAllRules() is executed, the rule will be able to print the ID and rating
for both 101 and 102.
I am surprised that the output is
Rating inserted ID as: 101 and rating: 1.0
It randomly takes either 101 or 102 and never both. Why is it so? Am I
missing something?
Thanks a million for the help:)
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10:11 a.m.
At least rule "Rating", as shown, isn't the one you've actually been
using - it wouldn't even compile. Please post actual, unmodified code
- or don't post at all.
-W
On 07/04/2013, goforcrazy <goforcrazy(a)gmail.com> wrote:
Hello All,
I am having some basic problems with how my rule file is working. Any help
regarding this will be greatly appreciated.
My rule is as follows:
rule "Rating"
when
m : method()
then
System.out.println("Rating inserted as: "+ m.getid() + " and rating:
" +
m.getRating());
end
In my main java file, I am calling in the main method:
insertRating(101, 1.0);
insertRating(102, 1.0);
ksession.fireAllRules();
The definition of insertRating is as below:
public void insertRating(int mid, double d)
{
RatingMessage msg = new RatingMessage(mid,d);
ksession.insert(msg);
}
My expectation is that 2 different ksession objects will be created and
when
fireAllRules() is executed, the rule will be able to print the ID and
rating
for both 101 and 102.
I am surprised that the output is
Rating inserted ID as: 101 and rating: 1.0
It randomly takes either 101 or 102 and never both. Why is it so? Am I
missing something?
Thanks a million for the help:)
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4:41 p.m.
Hello,
I appreciate your reply. I am very sorry for not being clear. The facts that
I have inserted using ksession.insert matches with the condition part of the
rule. Hence this rule is getting executed, but i gets executed only once,
either for 101 or 102.
Am i making a mistake somewhere?
Thanks for your patience.
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5 p.m.
Post a complete set of code, DRL and Java, reproducing the problem.
Otherwise, any discussion is pointless.
-W
On 07/04/2013, goforcrazy <goforcrazy(a)gmail.com> wrote:
Hello,
I appreciate your reply. I am very sorry for not being clear. The facts
that
I have inserted using ksession.insert matches with the condition part of
the
rule. Hence this rule is getting executed, but i gets executed only once,
either for 101 or 102.
Am i making a mistake somewhere?
Thanks for your patience.
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5:11 p.m.
Hello,
Since I wanted to highlight what the problem was, I didnt quite give the
entire source code. Let me be clear now.
IN the drl file:
rule "Rating"
when
m : RatingMessage()
then
System.out.println("Rating inserted as: "+ m.getid() + "
and
rating: " +
m.getRating());
end
I have a Java file by name RatingMessage.java, the source code of which is
pasted below:
public class RatingMessage {
private int mid;
private double rating;
public RatingMessage(int mid, double rating) {
//super();
this.mid = mid;
this.rating = rating;
}
public int getMid() {
return mid;
}
public void setMid(int mid) {
this.mid = mid;
}
public double getRating() {
return rating;
}
public void setRating(float rating) {
this.rating = rating;
}
}
In this case public RatingMessage(int mid, double rating) method is invoked
and when I am calling the methods in the main java file as
insertRating(101, 1.0);
insertRating(102, 1.0);
ksession.fireAllRules();
Randomly 101 or 102 is being picked and I am getting only one of these as
the output. Since each insertRating will invoke ksession.insert twice I was
expecting to see both ratings inserted.
public RatingMessage insertRating(int mid, double d) {
RatingMessage msg = new RatingMessage(mid,d);
ksession.insert(msg);
return msg;
}
Let me know if you need anything else to figure out the problem in the code.
Thanks
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5:20 p.m.
Once again: the code you are posting isn't consistent in itself. You
are changing either the DRL or the Java code from what you actually
run.
As I said: either post complete and accurate code that reproduces the
problem or stop posting.
-W
On 07/04/2013, goforcrazy <goforcrazy(a)gmail.com> wrote:
Hello,
Since I wanted to highlight what the problem was, I didnt quite give the
entire source code. Let me be clear now.
IN the drl file:
rule "Rating"
when
m : RatingMessage()
then
System.out.println("Rating inserted as: "+ m.getid() + "
and
rating: " +
m.getRating());
end
I have a Java file by name RatingMessage.java, the source code of which is
pasted below:
public class RatingMessage {
private int mid;
private double rating;
public RatingMessage(int mid, double rating) {
//super();
this.mid = mid;
this.rating = rating;
}
public int getMid() {
return mid;
}
public void setMid(int mid) {
this.mid = mid;
}
public double getRating() {
return rating;
}
public void setRating(float rating) {
this.rating = rating;
}
}
In this case public RatingMessage(int mid, double rating) method is invoked
and when I am calling the methods in the main java file as
insertRating(101, 1.0);
insertRating(102, 1.0);
ksession.fireAllRules();
Randomly 101 or 102 is being picked and I am getting only one of these as
the output. Since each insertRating will invoke ksession.insert twice I was
expecting to see both ratings inserted.
public RatingMessage insertRating(int mid, double d) {
RatingMessage msg = new RatingMessage(mid,d);
ksession.insert(msg);
return msg;
}
Let me know if you need anything else to figure out the problem in the
code.
Thanks
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5:30 p.m.
This is the exact code that I am using. I have not made any changes to it.
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5:43 p.m.
So please explain how
public int getMid()...
in RatingMessage.java agrees with
m.getid()
in the DRL code?
Don't write any more emails without a *complete* set of code
reproducing the problem.
On 07/04/2013, goforcrazy <goforcrazy(a)gmail.com> wrote:
This is the exact code that I am using. I have not made any changes
to it.
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8:40 p.m.
As Wolfgang recommends, please double-check your java code.. it would be
useful to see how you build
the KnowledgeBase and the KnowledgeSession, as well as the **full** DRL
file(s) you are loading.
In particular:
- check that the KnowledgeBuilder does not return any error
(kbuilder.getErrors()). It will not throw exceptions,
but you would get a "best effort" KB which is unsafe to use.
- check that you are not loading other DRLs, *** especially with rules
retracting your RatingMessages ***.
- check that you are not importing a stale RatingMessage class, with the
same name but in a different package.
- provide information on the version you are using
Otherwise, this would be an END-OF-THE-UNIVERSE bug and no Drools-based
application could possibly work, which
is extremely unlikely...
Best
Davide
On 04/07/2013 08:20 AM, Wolfgang Laun wrote:
Once again: the code you are posting isn't consistent in itself.
You
are changing either the DRL or the Java code from what you actually
run.
As I said: either post complete and accurate code that reproduces the
problem or stop posting.
-W
On 07/04/2013, goforcrazy <goforcrazy(a)gmail.com> wrote:
> Hello,
>
> Since I wanted to highlight what the problem was, I didnt quite give the
> entire source code. Let me be clear now.
>
> IN the drl file:
> rule "Rating"
>
> when
> m : RatingMessage()
> then
> System.out.println("Rating inserted as: "+ m.getid() +
"
> and
> rating: " +
> m.getRating());
>
> end
>
> I have a Java file by name RatingMessage.java, the source code of which is
> pasted below:
>
> public class RatingMessage {
> private int mid;
> private double rating;
>
>
> public RatingMessage(int mid, double rating) {
> //super();
> this.mid = mid;
> this.rating = rating;
> }
> public int getMid() {
> return mid;
> }
> public void setMid(int mid) {
> this.mid = mid;
> }
> public double getRating() {
> return rating;
> }
> public void setRating(float rating) {
> this.rating = rating;
> }
> }
>
>
> In this case public RatingMessage(int mid, double rating) method is invoked
> and when I am calling the methods in the main java file as
>
> insertRating(101, 1.0);
> insertRating(102, 1.0);
> ksession.fireAllRules();
>
> Randomly 101 or 102 is being picked and I am getting only one of these as
> the output. Since each insertRating will invoke ksession.insert twice I was
> expecting to see both ratings inserted.
>
>
> public RatingMessage insertRating(int mid, double d) {
> RatingMessage msg = new RatingMessage(mid,d);
> ksession.insert(msg);
> return msg;
> }
>
>
> Let me know if you need anything else to figure out the problem in the
> code.
>
> Thanks
>
>
>
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> View this message in context:
> http://drools.46999.n3.nabble.com/Basic-question-tp4023234p4023238.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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9:52 p.m.
I am really sorry about this.
I missed the errors in the rule file.
rule "Rating"
dialect "java"
when
m : RatingMessage()
then
System.out.println("Rating inserted as: "+ m.getMid() + " and rating:
" +
m.getRating());
end
I apologize for the confusion.
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4059
days inactive
4059
days old
9 comments
3 participants
participants (3)
-
Davide Sottara -
goforcrazy -
Wolfgang Laun