Re: [rules-users] Getting validation errors
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
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Mike Dougherty
mjdougherty(a)gmail.com <mailto:mjdougherty@gmail.com>
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Edson Tirelli
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