using matches in a collection
by ygaurav
Hi All
i am new to drools and I am hoping that some body can help me out here.
I data in string array and I would like to check if one of the entry starts
with the string I have. How can check it ?
Code is shown below
@java
class ABC {
String[] array = new String[]{"abcdef","ghijkl","mnopqrst"}
}
@drools
rule "check something"
when
$abc : ( ABC.array contains a single entry which start with "abc" )
Is there a way I can do it ? If it is not possible what is way I can achive
it
Thanks
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17 years, 5 months
JBoss Rules as a Daemon Service
by Arjun Dhar
Hi,
I uploaded the JBoss Rules 4 WAR; I saw the repository options but no admin
console to run a service. Maybe I'm missing something?!?!
Q) Being under the cover of the JBoss server am sure there must be some
fascility to run this as a daemon service 'out of the box'! Right?? <--
Important
(posted this 3 days ago but it got lost somwhere; prob deleted the approval
mail; FYI not being impatient :o) but its important so would like to know)
Thanks!
17 years, 7 months
Localization in DSL
by Shigeaki Wakizaka
Hello.
I'd like to use Japanese in DSL.
Is it possible?
Do you have a plan to do the localize-thing with DSL and
brand-new BRMS?
Thanks in advance
Shige
17 years, 7 months
Adding Rules and Packages to existing rule base (4.0.7)
by cfili
What is the proper way to add rules to existing packages that are already
part of a rule base?
When adding rules to the package directly, those rules are listed in the
rule base however they do not seem to be "active" and will never trigger. I
get the same results if I add rules to a package that was created by the
PackageBuilder but not part of an existing rule base. Allowing Drools to
"merge" the packages also seems to yield a similar result where the first
set of rules are active, but what was added later or merged will not be
active.
I know that this type of activity is supported I just want to make sure I do
it the right way.
Thanks.
--
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17 years, 9 months
how to specify classpath dependencies in .drl files.
by Godmar Back
My question is how to manage a rule base that is composed from sets of
rules drawn from different sources.
Our goal is to supply sets of rules as .jar files - each .jar file
containing a related set of rules. For instance, consider an expert
system where different experts could export their expertise in such a
jar file. Such a .jar file would contain one or more .drl files and a
set of supporting .java classes. We'd like to be able to refer to
these .jar files using a URLClassLoader and/or JarURLConnection so
they can be referred to without a user having to download them prior
to starting their application.
Users should be able to combine those provided rules (that is, the
rules of those experts whose knowledge they wish to exploit) with
their own rules in their own .drl files.
My question is whether drools supports such a setup easily.
Specifically, is there a way for a user to import external .jar files
in their .drl files? A statement such as
use jar:http://expertbase.com/expert1/knowledge5.jar
which would instruct the rule compiler to load the classes from this
jar to its compile class path, and which would instruct the class
loader used to load the user's classes to delegate to the loader used
to load the jar file's classes? [Note that a given expert's knowledge
should only be loaded by one classloader.]
I browsed through the API and discovered that the package builder
configuration allows the specification of a class loader. Does this
mean the rule compiler will attempt to load related classes through
this loader as well? If so, it would need to use reflection to examine
those classes (which I'd find unlikely). If not, is there a way to
control the rule compiler's compiler classpath?
In our current prototype, we need to load everything through the
application classpath to avoid compile errors.
- Godmar
17 years, 9 months
Independent rule evaluations
by Yuri
Considering that I have a set of rules that can be time consuming to assert is
there a way to separate them from other rules without having to resort to
multiple working memories?
I basically want to be able to assert facts and evalute a set of rules as fast
as I can before actually having the time consuming set of rules evaluate.
thanks,
17 years, 11 months
Nested Rules
by Vishal Deshmukh
Hi
I am using Drools 4.0.4 with Eclipse 3.2. I m much happy with the results. But now my application needs nested loops..
Can i write nested rules like
rule "rule 1 " // if condition of rule 1 is true then only execute rule 2 other wise skip it
when
condition is true
then
execute rule2
rule "rule 2 "
when
condition is true
then
action
rule "rule 3"
when
condition is true
then
action
Thanks and Rgards
Vishal
17 years, 11 months
Writing rules using java..
by Kolla, Sandeep
Hi Rahul,
Its not about storing the whole file into the database.
I would have a Table representing the parameteres required to construct
a rule.
For example.
Tables:
RuleSetTable:
Ruleset_id
Ruleset_name
RuleTable:
Rule_id
Rule_name
Rule_saliance
Rule_condition
Rule_consequence
Ruleset_id
Now while loading the rules the application basically should read from
the DB, and construct the rules, as everything required to construct the
rules is avaliable in the tables.
This requirement had come up because as the rules keep changing quite
frequently, we don't want to bring down the application to load a new
DRL file.
Hope you understood what I want to achieve.
Thanks much,
Sandeep.
18 years
wrapping drools api?
by thomaskukofka＠web.de
Hello,
some people write about wrapping the Drools API with an own access API
for integration in the application.
Sorry for the perhaps stupid question, but what is the reason for this?
Does this only make sense if I'm thinking about changing the rule
engine one day?
If I'm not intending to change the rule engine from Drools to another,
so isn't it the same if the developpers has to use the native Drools API
or an self-written access API?
Regards
Tom
18 years
