Thanks for the quick response. However I still have two questions -
1. Are we saying that we insert all user objects in the working memory alogn with the Event that arrives at runtime in the memory? What is the volume of data that the rules engine can handle in terms of these users in working memory?

2. I am still confused if I donot use a rules engine (I dont have any work flows nor any complex logic), how can I have a dynamic way of doing this? Please remember that I can have one subscribed alert which says alert me when balance in account < 1000 other can say alert me when report A is available.

Writing custome code around them would require adding this custom code every time a new subscription requirement arrives..

Would appreciate any inputs on the same.

thanks
Shikha

"Michal Bali" <michalbali@gmail.com> Sent by: rules-users-bounces@lists.jboss.org 11/04/2008 05:53 PM Please respond to Rules Users List <rules-users@lists.jboss.org>

To "Rules Users List" <rules-users@lists.jboss.org> cc Subject Re: [rules-users] DROOLS having RHS dynamic(5.0)

Hi,

You could have a rule that will match on User as well as Data. This should prevent regenerating drl files

rule rule1
 when
   $user:User( subscribedRules contains "rule1" )
   $data:Data(userId == $user.id)
   ... other conditions using $data.amount ...
 then
   //
end

Data is needed when a user wants to subscribe to one rule with different values.

However if you don't foresee any complex logic. I don't think there is a need for a rule engine.

Just my 2c.

Best Regards,
Michal


On Tue, Nov 4, 2008 at 10:08 PM, <shikha.x.aggarwal@jpmchase.com> wrote:

Hi,

I am looking to use drools where I can have users subscribed to specific alerts. Hence for example -
I can have a rule like ->
Rule 1 -> amount < {amount}

Where {amount} is the value which the user defines at the time of subscribing, hence the user wants to recieve an alert when the amount in his account < {amount} that he just subscribed to.

I was trying to use the DROOLS template feature and was even able to succesfully execute this specific scenario. The use case I was executing is, when an event of type Rule 1 occurs , I get all users who are subscribed to rule 1, and then create a drl file for all of those users with there custom data substituted as part of {amount}. Now I fire the rules(note I have multiple rules one for each user} which executes for this specific event and gives the required results(The above example is just a sample example). My area of concerns are -

1. Is Rule engine really the platform I am looking at? As I dont have any complex logic , I just want to use some component which can evaluate my Events that arrive with different subscription rules?

2. If I regenearte the drl file every time an event arrives (I need to because every time a iff type of rule can fire and the list of subscribers can be different as well), this would have a performace impact as the rules are compiled and generated every time and not really cached?

Please let me know if the problem is not clear. Any help/inputs in this regard would be highly appreciated.

Thanks
Shikha

---

This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to UK legal entities.

_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users

_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users

---

This communication is for informational purposes only. It is not intended as an offer or solicitation for the purchase or sale of any financial instrument or as an official confirmation of any transaction. All market prices, data and other information are not warranted as to completeness or accuracy and are subject to change without notice. Any comments or statements made herein do not necessarily reflect those of JPMorgan Chase & Co., its subsidiaries and affiliates. This transmission may contain information that is privileged, confidential, legally privileged, and/or exempt from disclosure under applicable law. If you are not the intended recipient, you are hereby notified that any disclosure, copying, distribution, or use of the information contained herein (including any reliance thereon) is STRICTLY PROHIBITED. Although this transmission and any attachments are believed to be free of any virus or other defect that might affect any computer system into which it is received and opened, it is the responsibility of the recipient to ensure that it is virus free and no responsibility is accepted by JPMorgan Chase & Co., its subsidiaries and affiliates, as applicable, for any loss or damage arising in any way from its use. If you received this transmission in error, please immediately contact the sender and destroy the material in its entirety, whether in electronic or hard copy format. Thank you. Please refer to http://www.jpmorgan.com/pages/disclosures for disclosures relating to UK legal entities.

_______________________________________________
rules-users mailing list
rules-users@lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users