6:59 a.m.
Hi all,
I am writing rules using Drools Templates and I noticed strange problems
(ocurring when I slightly modify a DRT that works well):
1. the template instanciation depends on the declarations order of
the parameters in the template header
2. if the rule template does not contain a package declaration
(default package) the instanciation of the template fails
I am working with Drools 5.1.1 but those problems occur in 5.2.0.Final
and in 5.3.0.Final as well.
Do you think it is worth posting a JIRA?
Anyway let me tell you that Drools Templates are great! Our users like
that feature a lot! They start writing a rule in DRL format and, once it
works, they transform it into a DRT and put data into a tsv file. It is
quite a natural way of working. The general perception here is that it
is easier to "templatize" an existing DRL than to write a decision table
from scratch.
Best regards,
Bruno.
PS:
_DRT that works well_:
template header
*name
message
package templates;
*
import org.drools.bug.Entity;
template "TestTemplate"
rule "Test1 @{row.rowNumber}"
dialect "mvel"
when
Entity( $name : name == "@{name}" )
then
System.out.println("@{message}" + $name);
insert($name);
end
end template
_DRT that does not work_ (first case):
template header
*message
name
package templates;
*
import org.drools.bug.Entity;
template "TestTemplate"
rule "Test1 @{row.rowNumber}"
dialect "mvel"
when
Entity( $name : name == "@{name}" )
then
System.out.println("@{message}" + $name);
insert($name);
end
end template
_DRT that does not work_ (second case):
template header
*name
message
*
import org.drools.bug.Entity;
template "TestTemplate"
rule "Test1 @{row.rowNumber}"
dialect "mvel"
when
Entity( $name : name == "@{name}" )
then
System.out.println("@{message}" + $name);
insert($name);
end
end template
8:07 a.m.
Before you work on a JIRA could you please provide an (abbreviated) example
of a template that causes both errors?
-W
2011/11/3 Bruno Freudensprung <bruno.freudensprung(a)temis.com>
**
Hi all,
I am writing rules using Drools Templates and I noticed strange problems
(ocurring when I slightly modify a DRT that works well):
1. the template instanciation depends on the declarations order of the
parameters in the template header
2. if the rule template does not contain a package declaration
(default package) the instanciation of the template fails
I am working with Drools 5.1.1 but those problems occur in 5.2.0.Final and
in 5.3.0.Final as well.
Do you think it is worth posting a JIRA?
Anyway let me tell you that Drools Templates are great! Our users like
that feature a lot! They start writing a rule in DRL format and, once it
works, they transform it into a DRT and put data into a tsv file. It is
quite a natural way of working. The general perception here is that it is
easier to "templatize" an existing DRL than to write a decision table from
scratch.
Best regards,
Bruno.
PS:
*DRT that works well*:
template header
*name
message
package templates;
*
import org.drools.bug.Entity;
template "TestTemplate"
rule "Test1 @{row.rowNumber}"
dialect "mvel"
when
Entity( $name : name == "@{name}" )
then
System.out.println("@{message}" + $name);
insert($name);
end
end template
*DRT that does not work* (first case):
template header
*message
name
package templates;
*
import org.drools.bug.Entity;
template "TestTemplate"
rule "Test1 @{row.rowNumber}"
dialect "mvel"
when
Entity( $name : name == "@{name}" )
then
System.out.println("@{message}" + $name);
insert($name);
end
end template
*DRT that does not work* (second case):
template header
*name
message
*
import org.drools.bug.Entity;
template "TestTemplate"
rule "Test1 @{row.rowNumber}"
dialect "mvel"
when
Entity( $name : name == "@{name}" )
then
System.out.println("@{message}" + $name);
insert($name);
end
end template
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rules-users(a)lists.jboss.org
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8:21 a.m.
Hi Wolfgang,
Sure. Please find attached a small Maven/Eclipse project containing 3
DRT and 3 unit test cases (Java in src/test/java/org/drools/bug, rules
in src/test/resource/org/drools/bug) :
* Test1OK(.java/.drt/.csv) is the one working well
* Test1KO(.java/.drt/.csv) is the one illustrating the 1) behavior
* Test1KO2(.java/.drt/.csv) is the one illustrating the 2) behavior
Regards,
Bruno.
Le 03/11/2011 14:07, Wolfgang Laun a écrit :
Before you work on a JIRA could you please provide an (abbreviated)
example of a template that causes both errors?
-W
2011/11/3 Bruno Freudensprung <bruno.freudensprung(a)temis.com
<mailto:bruno.freudensprung@temis.com>>
Hi all,
I am writing rules using Drools Templates and I noticed strange
problems (ocurring when I slightly modify a DRT that works well):
1. the template instanciation depends on the declarations order
of the parameters in the template header
2. if the rule template does not contain a package declaration
(default package) the instanciation of the template fails
I am working with Drools 5.1.1 but those problems occur in
5.2.0.Final and in 5.3.0.Final as well.
Do you think it is worth posting a JIRA?
Anyway let me tell you that Drools Templates are great! Our users
like that feature a lot! They start writing a rule in DRL format
and, once it works, they transform it into a DRT and put data into
a tsv file. It is quite a natural way of working. The general
perception here is that it is easier to "templatize" an existing
DRL than to write a decision table from scratch.
Best regards,
Bruno.
PS:
_DRT that works well_:
template header
*name
message
package templates;
*
import org.drools.bug.Entity;
template "TestTemplate"
rule "Test1 @{row.rowNumber}"
dialect "mvel"
when
Entity( $name : name == "@{name}" )
then
System.out.println("@{message}" + $name);
insert($name);
end
end template
_DRT that does not work_ (first case):
template header
*message
name
package templates;
*
import org.drools.bug.Entity;
template "TestTemplate"
rule "Test1 @{row.rowNumber}"
dialect "mvel"
when
Entity( $name : name == "@{name}" )
then
System.out.println("@{message}" + $name);
insert($name);
end
end template
_DRT that does not work_ (second case):
template header
*name
message
*
import org.drools.bug.Entity;
template "TestTemplate"
rule "Test1 @{row.rowNumber}"
dialect "mvel"
when
Entity( $name : name == "@{name}" )
then
System.out.println("@{message}" + $name);
insert($name);
end
end template
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https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
10:27 a.m.
It seems that some template/CSV parser expects the parameters in the same
order as the column headers of the CSV. Also, there is no explicit
termination of the parameter list, and therefore the parser appears to rely
on "package" being the first statement of the header text to precede all
expansions.
At least, it should be documented.
-W
2011/11/3 Bruno Freudensprung <bruno.freudensprung(a)temis.com>
**
Hi Wolfgang,
Sure. Please find attached a small Maven/Eclipse project containing 3 DRT
and 3 unit test cases (Java in src/test/java/org/drools/bug, rules in
src/test/resource/org/drools/bug) :
- Test1OK(.java/.drt/.csv) is the one working well
- Test1KO(.java/.drt/.csv) is the one illustrating the 1) behavior
- Test1KO2(.java/.drt/.csv) is the one illustrating the 2) behavior
Regards,
Bruno.
Le 03/11/2011 14:07, Wolfgang Laun a écrit :
Before you work on a JIRA could you please provide an (abbreviated)
example of a template that causes both errors?
-W
2011/11/3 Bruno Freudensprung <bruno.freudensprung(a)temis.com>
> Hi all,
>
> I am writing rules using Drools Templates and I noticed strange problems
> (ocurring when I slightly modify a DRT that works well):
>
> 1. the template instanciation depends on the declarations order of
> the parameters in the template header
> 2. if the rule template does not contain a package declaration
> (default package) the instanciation of the template fails
>
> I am working with Drools 5.1.1 but those problems occur in 5.2.0.Final
> and in 5.3.0.Final as well.
> Do you think it is worth posting a JIRA?
>
> Anyway let me tell you that Drools Templates are great! Our users like
> that feature a lot! They start writing a rule in DRL format and, once it
> works, they transform it into a DRT and put data into a tsv file. It is
> quite a natural way of working. The general perception here is that it is
> easier to "templatize" an existing DRL than to write a decision table from
> scratch.
>
> Best regards,
>
> Bruno.
>
> PS:
>
> *DRT that works well*:
>
> template header
> *name
> message
>
> package templates;
> *
> import org.drools.bug.Entity;
>
> template "TestTemplate"
> rule "Test1 @{row.rowNumber}"
> dialect "mvel"
> when
> Entity( $name : name == "@{name}" )
> then
> System.out.println("@{message}" + $name);
> insert($name);
> end
> end template
>
> *DRT that does not work* (first case):
>
> template header
> *message
> name
>
> package templates;
> *
> import org.drools.bug.Entity;
>
> template "TestTemplate"
> rule "Test1 @{row.rowNumber}"
> dialect "mvel"
> when
> Entity( $name : name == "@{name}" )
> then
> System.out.println("@{message}" + $name);
> insert($name);
> end
> end template
>
>
> *DRT that does not work* (second case):
>
> template header
> *name
> message
> *
> import org.drools.bug.Entity;
>
> template "TestTemplate"
> rule "Test1 @{row.rowNumber}"
> dialect "mvel"
> when
> Entity( $name : name == "@{name}" )
> then
> System.out.println("@{message}" + $name);
> insert($name);
> end
> end template
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
_______________________________________________
rules-users mailing
listrules-users@lists.jboss.orghttps://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
11:04 a.m.
Alright!
Concerning the package declaration, it is mentioned as "optional" (see
Example 5.3. Rule template file: templates) in the documentation.
Thanks for your answer!
Regards,
Bruno.
Le 03/11/2011 16:27, Wolfgang Laun a écrit :
It seems that some template/CSV parser expects the parameters in the
same order as the column headers of the CSV. Also, there is no
explicit termination of the parameter list, and therefore the parser
appears to rely on "package" being the first statement of the header
text to precede all expansions.
At least, it should be documented.
-W
2011/11/3 Bruno Freudensprung <bruno.freudensprung(a)temis.com
<mailto:bruno.freudensprung@temis.com>>
Hi Wolfgang,
Sure. Please find attached a small Maven/Eclipse project
containing 3 DRT and 3 unit test cases (Java in
src/test/java/org/drools/bug, rules in
src/test/resource/org/drools/bug) :
* Test1OK(.java/.drt/.csv) is the one working well
* Test1KO(.java/.drt/.csv) is the one illustrating the 1) behavior
* Test1KO2(.java/.drt/.csv) is the one illustrating the 2)
behavior
Regards,
Bruno.
Le 03/11/2011 14:07, Wolfgang Laun a écrit :
> Before you work on a JIRA could you please provide an
> (abbreviated) example of a template that causes both errors?
> -W
>
> 2011/11/3 Bruno Freudensprung <bruno.freudensprung(a)temis.com
> <mailto:bruno.freudensprung@temis.com>>
>
> Hi all,
>
> I am writing rules using Drools Templates and I noticed
> strange problems (ocurring when I slightly modify a DRT that
> works well):
>
> 1. the template instanciation depends on the declarations
> order of the parameters in the template header
> 2. if the rule template does not contain a package
> declaration (default package) the instanciation of the
> template fails
>
> I am working with Drools 5.1.1 but those problems occur in
> 5.2.0.Final and in 5.3.0.Final as well.
> Do you think it is worth posting a JIRA?
>
> Anyway let me tell you that Drools Templates are great! Our
> users like that feature a lot! They start writing a rule in
> DRL format and, once it works, they transform it into a DRT
> and put data into a tsv file. It is quite a natural way of
> working. The general perception here is that it is easier to
> "templatize" an existing DRL than to write a decision table
> from scratch.
>
> Best regards,
>
> Bruno.
>
> PS:
>
> _DRT that works well_:
>
> template header
> *name
> message
>
> package templates;
> *
> import org.drools.bug.Entity;
>
> template "TestTemplate"
> rule "Test1 @{row.rowNumber}"
> dialect "mvel"
> when
> Entity( $name : name == "@{name}" )
> then
> System.out.println("@{message}" + $name);
> insert($name);
> end
> end template
>
> _DRT that does not work_ (first case):
>
> template header
> *message
> name
>
> package templates;
> *
> import org.drools.bug.Entity;
>
> template "TestTemplate"
> rule "Test1 @{row.rowNumber}"
> dialect "mvel"
> when
> Entity( $name : name == "@{name}" )
> then
> System.out.println("@{message}" + $name);
> insert($name);
> end
> end template
>
>
> _DRT that does not work_ (second case):
>
> template header
> *name
> message
> *
> import org.drools.bug.Entity;
>
> template "TestTemplate"
> rule "Test1 @{row.rowNumber}"
> dialect "mvel"
> when
> Entity( $name : name == "@{name}" )
> then
> System.out.println("@{message}" + $name);
> insert($name);
> end
> end template
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org>
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org <mailto:rules-users@lists.jboss.org>
> https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
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https://lists.jboss.org/mailman/listinfo/rules-users
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4801
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4801
days old
4 comments
2 participants
participants (2)
-
Bruno Freudensprung -
Wolfgang Laun