3:07 a.m.
Hello,
I am using JBoss Rules to validate entities before storing them in
the database. I therefore need a way to inform the calling code that
the entity which was asserted failed verification. The only way I
have been able to find that works is to assert an exception from
within the rule file. For example:
rule "user is 'miked'"
when
identity : Identity( username == "miked" )
then
assertLogical(new IllegalStateException("Entity failed
verification."));
end
Then in the Java that fires the rule, I have:
workingMemory.fireAllRules();
for(Iterator i = workingMemory.getObjects(Exception.class).iterator
(); i.hasNext(); ) {
System.out.println("Exception: "+i.next());
}
Which seems to be working OK. But I wanted to see if maybe there is a
better way to accomplish what I need.
Thanks for you help.
Mike
--
*********************************
Mike Dougherty
mjdougherty(a)gmail.com
858.232.3635
http://www.google.com/talk/
*********************************
12:26 p.m.
Hi Mike,
On 3/13/07, Mike Dougherty <mjdougherty(a)gmail.com> wrote:
Hello,
I am using JBoss Rules to validate entities before storing them in the
database. I therefore need a way to inform the calling code that the entity
which was asserted failed verification. The only way I have been able to
find that works is to assert an exception from within the rule file. For
example:
rule "user is 'miked'"
when
identity : Identity( username == "miked" )
then
assertLogical(new IllegalStateException("Entity failed verification."));
end
Then in the Java that fires the rule, I have:
workingMemory.fireAllRules();
for(Iterator i = workingMemory.getObjects(Exception.class).iterator();
i.hasNext(); ) {
System.out.println("Exception: "+i.next());
}
Which seems to be working OK. But I wanted to see if maybe there is a better
way to accomplish what I need.
Thanks for you help.
Mike
My approach would be to derive all objects that will be validated from
a superclass, e.g. ValidatedObject, which provides a boolean property
"validated".
Then you can set this property in your rules and later on display
warning/error messages for those objects that failed validation.
Best regards
Marcus
11:39 p.m.
Mike
What I usually see is that you have a fact or attribute where you can
set the result of your validation:
rule "user is miked"
when
$id : Identity( usename == "miked" )
$p : Permission( id == $id )
then
$p.deny();
end
In your application you asserted the Permission object, so you have
it's handle and just check the result:
if( permission.isDenied() ) {
// do something
}
Another way would be to use call back, setting the callback instance
as a global:
global org.sample.PermissionManager permission;
rule "user is miked"
when
$id : Identity( usename == "miked" )
then
permission.deny( $id );
end
[]s
Edson
Mike Dougherty wrote:
Hello,
I am using JBoss Rules to validate entities before storing them in the
database. I therefore need a way to inform the calling code that the
entity which was asserted failed verification. The only way I have
been able to find that works is to assert an exception from within the
rule file. For example:
rule "user is 'miked'"
when
identity : Identity( username == "miked" )
then
assertLogical(new IllegalStateException("Entity failed
verification."));
end
Then in the Java that fires the rule, I have:
workingMemory.fireAllRules();
for(Iterator i = workingMemory.getObjects(Exception.class).iterator();
i.hasNext(); ) {
System.out.println("Exception: "+i.next());
}
Which seems to be working OK. But I wanted to see if maybe there is a
better way to accomplish what I need.
Thanks for you help.
Mike
--
*********************************
Mike Dougherty
mjdougherty(a)gmail.com <mailto:mjdougherty@gmail.com>
858.232.3635
http://www.google.com/talk/
*********************************
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Edson Tirelli
Software Engineer - JBoss Rules Core Developer
Office: +55 11 3124-6000
Mobile: +55 11 9218-4151
JBoss, a division of Red Hat @ www.jboss.com
6261
days inactive
6261
days old
2 comments
3 participants
participants (3)
-
Edson Tirelli -
Marcus Ilgner -
Mike Dougherty