Re: [rules-users] Exception Handling in the rule
Firstly evals have to evaluate true or false - what you have here appears to return a
string -
presumably you are actually comparing this to some value?
One, not particularly elegant or efficient method is to do the check within your eval,
eg:
eval(ClaimsHistoryHelper.getClaimDrug(drugRefNo) == null ? false : drugName ==
(ClaimsHistoryHelper.getClaimDrug(drugRefNo)).getDrugName())
If your ClaimsHistoryHelper is doing a time consuming operation (eg going to a db etc),
you can probably make a very quick and simple efficiency saving by having it cache the
last result it searched for/returned (or depending on how many drugRefNo you are looking
up a more complete caching solution).
Thomas
-----Original Message-----
From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-
bounces(a)lists.jboss.org] On Behalf Of sdinoo
Sent: 07 June 2011 06:22
To: rules-users(a)lists.jboss.org
Subject: [rules-users] Exception Handling in the rule
Hi,
In my when clause I have an eval statement like this
eval((ClaimsHistoryHelper.getClaimDrug(drugRefNo)).getDrugName())
For some reason, there is no DrugRecord for the given drugRefNo and hence
I get javaNullPointer exceptions I do want to rule to continue evaluation and
not stop with the error and hence I dont want to handle exception at
fireAllRules catch block
How can I handle the exception in the DRL ?
--
View this message in context: http://drools.46999.n3.nabble.com/Exception-
Handling-in-the-rule-tp3033223p3033223.html
Sent from the Drools: User forum mailing list archive at Nabble.com.
_______________________________________________
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
**************************************************************************************