[rules-users] DROOLS having RHS dynamic(5.0)

[shikha.x.aggarwal at jpmchase.com]

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

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