Re: [rules-users] infinite loop in decision table
The easiest pattern is to create a "GroupLatch" helper object has a name.
Then add two columns, a Condition column which checks that there doesn't exist a Latch
with the given name, and an action column which inserts a new Latch with the given name
into the working memory. If multiple rules have the same name then only one of them will
run (and only once). If they all have different names then you allow all the rules to run
but only once.
Eg:
CONDITION ACTION
NOT GroupLatch
name insert(new GroupLatch("$param"));
Thomas
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-
bounces(a)lists.jboss.org] On Behalf Of djb
Sent: 19 January 2010 10:22
To: rules-users(a)lists.jboss.org
Subject: [rules-users] infinite loop in decision table
Hi,
I have successfully used UNLOOP to stop repitition of rules in my decision
table when one rule fires when all rules are mutually exclusive...
but I've got two rows/rules matching a condition for a given input, and it
is back to an infinite loop.
Is there something like lock-on-active for a decision table?
My table is basically something like the following, with an update in the
action:
Tariff X Minimum age Maximum Age
1234 5 <blank>
2345 <blank> 30
It checks whether a claim has a tariff, so so if a claim has both tariffs
and is between those two ages, it gets into an infinite update loop.
Thanks,
Daniel
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