Re: [rules-users] best way to write this rule?
You are thinking too procedurally.
You shouldn't be using lists, or collections within the rules, instead generally the
thing within the list should be inserted into the working memory.
Rather than having the function you can then right something like the following:
//person has earned the badge
p : Person()
badge : EarnedBadge(owner == p, name == "Foo")
or
//person has not earned the badge
p : Person()
not EarnedBadge(owner == p, name == "Foo")
For getting their progress you'd probably keep a list of BadgeTasks that a person has
completed,
You'd then use count/accumulate to add up the progress and update the EarnedBadge.
Thomas
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-
bounces(a)lists.jboss.org] On Behalf Of Warner Onstine
Sent: 11 August 2011 05:59
To: rules-users(a)lists.jboss.org
Subject: [rules-users] best way to write this rule?
I am new to Drools and I've been trying to figure this out through the user
guide and examples I've been finding, but I'm not sure what the best way is
to write this rule (or set of rules).
What I'm trying to write is a set of rules for determining when someone has
earned (or is starting to earn) a badge. I want to be able to show their
progress on badge completion as well as when they finally complete said
badge.
I'm passing in the following to the rule:
- Player
- Earned Badges (list)
- All possible badges
The first rule only deals with one specific badge. So I have something like this
in my when:
$badge : Badge(name == "Something") //my assumption is that Badge comes
from the list of all possible badges I've just passed in
Then, I decided to split the rule into two. One rule for when they had not
earned it yet:
and I call a function
function earnedBadge(List<EarnedBadge> badges, String name) {
boolean found = false;
for(EarnedBadge badge : badges) {
if(badge.getBadge().getName().equals(name)) {
found = true;
}
}
return found;
}
when:
earnedBadge(badges, $badge (name))
Then I got stuck. If they have completed one or more tasks I would like to
create (or use the badge they've started to earn) to track their progress. So,
If I have 5 possible things they need to do and they've done three of those
I'd like to create a new EarnedBadge for the one they are earning and give it
a percentage of 60%. What would be the best way to do something like this?
Thanks for helping out the newbie, it's greatly appreciated :).
-warner
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
**************************************************************************************
This message is confidential and intended only for the addressee. If you have received
this message in error, please immediately notify the postmaster(a)nds.com and delete it from
your system as well as any copies. The content of e-mails as well as traffic data may be
monitored by NDS for employment and security purposes. To protect the environment please
do not print this e-mail unless necessary.
NDS Limited. Registered Office: One London Road, Staines, Middlesex, TW18 4EX, United
Kingdom. A company registered in England and Wales. Registered no. 3080780. VAT no. GB 603
8808 40-00
**************************************************************************************