[rules-users] infinite loop in decision table

[Swindells, Thomas]

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 at lists.jboss.org [mailto:rules-users-
> bounces at lists.jboss.org] On Behalf Of djb
> Sent: 19 January 2010 10:22
> To: rules-users at 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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> table-tp129933p129933.html
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