[rules-users] Bugs in rule templates?
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
Attachments:
- attachment.html (text/html — 3.3 KB)