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<p class="MsoNormal">Hi all,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am new to drools and I’m trying to understand whether the following use case is supported – any help on the following will be greatly appreciated:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I would like to create a new event based on <b>multiple</b> events (all of the same type meeting a set of conditions) occurring
<b>over a given period of time T1</b>.<o:p></o:p></p>
<p class="MsoNormal">For each combination of values for fieldA and fieldB, a new group of event candidates should be opened (fieldA and fieldB are
<b>group by</b> fields. Each combination of values of these fields, should be treated separately).<o:p></o:p></p>
<p class="MsoNormal">The event should be created when <b>at least X events</b> occurred over the period. Count the events based on
<b>unique</b> values of fieldC and fieldD (for a given combination of fieldA and fieldB, if you notice an event with already existing values of the combination of fieldC and fieldD, it should not be counted).<o:p></o:p></p>
<p class="MsoNormal">If all conditions described above are met, create the desired new event.
<b>The new event will stay open for duration of T2, and update will be sent for it every T3.<o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal">Aside from the above, I need an <b>aggregation function (besides count) of “collect”</b> : in the new event the value of fieldE will be the collection of (preferably distinct) values of fieldE in originating events<b>. <o:p></o:p></b></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal">Example:<o:p></o:p></p>
<p class="MsoNormal">Port scan event – the basic event is connection. For each combination of source_ip and destination_ip (group by fields), detect a port scan event if over a minute (T1) there more than 20 (X) events with different ports (unique field).<o:p></o:p></p>
<p class="MsoNormal">The event will stay open for 10 minutes (T2) and an update will be sent every 1 minute (T3). Every update will contain the count of events, source_ip, destination_ip and collection of services.<o:p></o:p></p>
<p class="MsoNormal"><b><o:p> </o:p></b></p>
<p class="MsoNormal">Thanks a lot.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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