[rules-users] Drools Fusion: updating event duration

[Matteo Cusmai]

Hi Edson,
so, when i want modify an event, i could do as follow:

   - clone event;
   - change the duration
   - retract the previuos event
   - insert the new event

Is it right?

Bye bye,

Matteo.

2012/2/22 Edson Tirelli <ed.tirelli at gmail.com>

>
>    Unfortunately you can't update event durations or timestamp. Events are
> supposed to represent things that happened and as so, are immutable (other
> than data enrichment). If an event representation is no longer true, that
> event has to be retracted. Most common case is when you are dealing with
> atomic events (like start and end atomic events) that represent a complex
> event. Usually you will have a rule that correlates the start and end
> atomic events and creates a complex derived event, retracting the atomic
> ones.
>
>    Edson
>
> 2012/2/22 Matteo Cusmai <cusmaimatteo at gmail.com>
>
>>
>> Hi all,
>> i am using Drools Fusion in multi sensor data fusion system. I have some
>> rules that generate a new event when some situations occur. But from the
>> other hand, i would like to update the event, when i understand that new
>> sensor observation is referring to the same event. I have my Event clazz
>> with duration field, i try to update it in modify clause, but i have
>> concern about it, because when i use temporal operator (such as before,
>> meets, so on) it seems that Drools manage them as event with duration null.
>> I could post the code too.
>> Bye bye,
>> Matteo.
>> _______________________________________________
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>>
>>
>
>
> --
>   Edson Tirelli
>   JBoss Drools Core Development
>   JBoss by Red Hat @ www.jboss.com
>
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