Hi all,
I am writing rules using Drools Templates and I noticed
strange problems (ocurring when I slightly modify a DRT that
works well):
- the template instanciation depends on the declarations
order of the parameters in the template header
- 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