<br><font size=2 face="sans-serif">1. Thanks again, I will look at Drools
Fusion. However I think my question was not really on CEP , it was more
on that the subscription data is also now injected in the memory.</font>
<br><font size=2 face="sans-serif">2. I am not sure if I understand you
answer to the second point?</font>
<br>
<br>
<br>
<table width=100%>
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<td width=40%><font size=1 face="sans-serif"><b>"Michal Bali"
<michalbali@gmail.com></b> </font>
<br><font size=1 face="sans-serif">Sent by: rules-users-bounces@lists.jboss.org</font>
<p><font size=1 face="sans-serif">11/05/2008 11:18 AM</font>
<table border>
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<div align=center><font size=1 face="sans-serif">Please respond to<br>
Rules Users List <rules-users@lists.jboss.org></font></div></table>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td><font size=1 face="sans-serif">"Rules Users List" <rules-users@lists.jboss.org></font>
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<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [rules-users] DROOLS having RHS
dynamic(5.0)</font></table>
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<td></table>
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<br>
<br>
<br><font size=3>On Wed, Nov 5, 2008 at 2:36 PM, <</font><a href=mailto:shikha.x.aggarwal@jpmchase.com><font size=3 color=blue><u>shikha.x.aggarwal@jpmchase.com</u></font></a><font size=3>>
wrote:</font>
<br><font size=2 face="sans-serif"><br>
Thanks for the quick response. However I still have two questions - <br>
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? </font>
<br><font size=3>correct, you may want to look at Drools Fusion, just search
Drools blog for CEP, Complex Event Processing</font>
<br><font size=3>AFAIK it can handle as many object as big is your memory
:) especially true with the 'entry-point' support (a rule can see only
events it needs to)</font>
<br><font size=2 face="sans-serif">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.</font><font size=3>
</font>
<br><font size=3>.. User has a list of subscribed rules - subscribedRules</font><font size=2>
</font>
<br><font size=2 face="sans-serif"><br>
Writing custome code around them would require adding this custom code
every time a new subscription requirement arrives..</font><font size=3>
<br>
</font><font size=2 face="sans-serif"><br>
Would appreciate any inputs on the same.</font><font size=3> <br>
</font><font size=2 face="sans-serif"><br>
thanks</font><font size=3> </font><font size=2 face="sans-serif"><br>
Shikha</font><font size=3> <br>
<br>
<br>
<br>
<br>
<br>
</font>
<p>
<table width=100%>
<tr valign=top>
<td width=43%><font size=1 face="sans-serif"><b>"Michal Bali"
<</b></font><a href=mailto:michalbali@gmail.com target=_blank><font size=1 color=blue face="sans-serif"><b><u>michalbali@gmail.com</u></b></font></a><font size=1 face="sans-serif"><b>></b>
<br>
Sent by: </font><a href="mailto:rules-users-bounces@lists.jboss.org" target=_blank><font size=1 color=blue face="sans-serif"><u>rules-users-bounces@lists.jboss.org</u></font></a><font size=3>
</font>
<p><font size=1 face="sans-serif">11/04/2008 05:53 PM</font><font size=3>
</font>
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<div align=center><font size=1 face="sans-serif">Please respond to<br>
Rules Users List <</font><a href="mailto:rules-users@lists.jboss.org" target=_blank><font size=1 color=blue face="sans-serif"><u>rules-users@lists.jboss.org</u></font></a><font size=1 face="sans-serif">></font></div></table>
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<div align=right><font size=1 face="sans-serif">To</font></div>
<td width=86%><font size=1 face="sans-serif">"Rules Users List"
<</font><a href="mailto:rules-users@lists.jboss.org" target=_blank><font size=1 color=blue face="sans-serif"><u>rules-users@lists.jboss.org</u></font></a><font size=1 face="sans-serif">></font><font size=3>
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<td>
<div align=right><font size=1 face="sans-serif">Subject</font></div>
<td><font size=1 face="sans-serif">Re: [rules-users] DROOLS having RHS
dynamic(5.0)</font></table>
<br>
<br>
<table width=100%>
<tr valign=top>
<td width=50%>
<td width=50%></table>
<br></table>
<br><font size=3><br>
<br>
<br>
Hi,<br>
<br>
You could have a rule that will match on User as well as Data. This should
prevent regenerating drl files<br>
<br>
rule rule1<br>
when<br>
$user:User( subscribedRules contains "rule1" )<br>
$data:Data(userId == $</font><a href=http://user.id/ target=_blank><font size=3 color=blue><u>user.id</u></font></a><font size=3>)<br>
... other conditions using $data.amount ...<br>
then<br>
//<br>
end<br>
<br>
Data is needed when a user wants to subscribe to one rule with different
values.<br>
<br>
However if you don't foresee any complex logic. I don't think there is
a need for a rule engine.<br>
<br>
Just my 2c.<br>
<br>
Best Regards,<br>
Michal<br>
<br>
<br>
On Tue, Nov 4, 2008 at 10:08 PM, <</font><a href=mailto:shikha.x.aggarwal@jpmchase.com target=_blank><font size=3 color=blue><u>shikha.x.aggarwal@jpmchase.com</u></font></a><font size=3>>
wrote: </font><font size=2 face="sans-serif"><br>
<br>
Hi,</font><font size=3> </font><font size=2 face="sans-serif"><br>
<br>
I am looking to use drools where I can have users subscribed to specific
alerts. Hence for example - <br>
I can have a rule like -></font><font size=3> </font><font size=2 face="sans-serif"><br>
Rule 1 -> amount < {amount}</font><font size=3> </font><font size=2 face="sans-serif"><br>
<br>
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.</font><font size=3> </font><font size=2 face="sans-serif"><br>
<br>
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 -</font><font size=3> </font><font size=2 face="sans-serif"><br>
<br>
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?</font><font size=3>
</font><font size=2 face="sans-serif"><br>
<br>
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?</font><font size=3>
</font><font size=2 face="sans-serif"><br>
<br>
Please let me know if the problem is not clear. Any help/inputs in this
regard would be highly appreciated.</font><font size=3> </font><font size=2 face="sans-serif"><br>
<br>
Thanks</font><font size=3> </font><font size=2 face="sans-serif"><br>
Shikha</font><font size=3> </font>
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