[rules-users] is there any 'followed by' in Drools as we have in esper

[Wolfgang Laun]

There are several temporal operators, as described in the "Drools
Fusion" manual.

Most likely, the corresponding one is the "after" operator.

-W

On 11/04/2012, skatta1986 <shivaprasad_gdk at yahoo.co.in> wrote:
> Hi,
>
> Please any one let me know if there is any followed by operator in Drools. I
> want to correlate an event with another event which follows the first event.
>
> Esper supports this by using followed by (->) operator.
> Example in esper:
> "select  r1.name as name,r1.userIPAddress as ipaddress,count(*) as
> usr_success_count, (r2.getTimeStamp()-r1.getTimeStamp()) as delta_time from
> pattern" +
> "[ (every r1=EventRecord(eventNumber=105, eventType='EVENT_REQUEST'))-> " +
> "(r2=EventRecord(eventNumber=110, eventType='EVENT_SUCCES',
> id.getCallId()=r1.getId(), name=r1.name)) where
> timer:within(usr_timeout_interval sec)]";
>
> Can you please providesimilar kind of rule in Drools.
>
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