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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>I think the problem is that the stockticks
aren’t being processed unless I use the:<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'>From entry-point
“StockTick stream” <o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=black face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:black'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>But I can’t combine “from accumulate”
with that from statement successfully in that sample I sent. I think that is
the problem . The sample I sent, none of those ever get processed since it is
not looking at the proper entry point…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=green face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:green'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=green face="Courier New"><span
style='font-size:10.0pt;font-family:"Courier New";color:green'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=3 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'>
rules-users-bounces@lists.jboss.org
[mailto:rules-users-bounces@lists.jboss.org] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Michal Bali<br>
<b><span style='font-weight:bold'>Sent:</span></b> Wednesday, May 27, 2009
11:09 AM<br>
<b><span style='font-weight:bold'>To:</span></b> Rules Users List<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: [rules-users] keeping
running stats</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>Hi Chris,<br>
<br>
You can use 'accumulate' with sliding time window. Have a look here <a
href="http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/drools-fusion/html/ch02.html#d0e1169">http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/drools-fusion/html/ch02.html#d0e1169</a><o:p></o:p></span></font></p>
<pre><font size=2 face="Courier New"><span style='font-size:10.0pt'>rule "Sound the alarm in case temperature rises above threshold"<br>
when<br>
TemperatureThreshold( $max : max )<br>
Number( doubleValue > $max ) from accumulate(<br>
<br>
<o:p></o:p></span></font></pre><pre><font size=2 face="Courier New"><span
style='font-size:10.0pt'> SensorReading( $temp : temperature ) over window:time( 10m ),<br>
average( $temp ) )<br>
then<br>
// sound the alarm<br>
end<o:p></o:p></span></font></pre>
<p class=MsoNormal style='margin-bottom:12.0pt'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>The engine will
automatically discard any SensorReading older than 10 minutes and keep the
calculated average consistent.<br>
<br>
Is that what you're looking for?<br>
<br>
Michal<br>
<br>
<o:p></o:p></span></font></p>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'>2009/5/27 Chris Richmond <<a href="mailto:crichmond@referentia.com">crichmond@referentia.com</a>><o:p></o:p></span></font></p>
<div link=blue vlink=purple>
<div>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Hello,</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>I
have modified the stockTicker fusion example to keep some running stats, you
can see from the rule snippet below that it injects a stats object based on the
symbol then matches them as updates come in later. You can see for now I
am just updating the running counts and outputting the readings count on each
stock tick and this works fine.</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>What
I would like to do however is only have the running averages,stats object
reflect stock ticks that are still in memory….essentiall only stock tick items
that have not expired. As it is now the count just keeps growing and
growing, I want the count to only reflect the stock ticks within the expiration
time in the past for stock ticks, but I cannot figure out how to make this
happen? Could anyone give me a pointer on how to do this?
How to make the stats object only reflect those stock ticks that have not
expired? I do not know the strategy for this.</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Thanks,</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'>Chris</span></font><o:p></o:p></p>
<p><font size=2 face=Arial><span style='font-size:10.0pt;font-family:Arial'> </span></font><o:p></o:p></p>
<p><font size=2 color=olive face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:olive'># tells the engine that a StockTick
instance will assume the</span></font><o:p></o:p></p>
<p><font size=2 color=olive face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:olive'># role (semantics) of events and that
the default retention </span></font><o:p></o:p></p>
<p><font size=2 color=olive face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:olive'># policy will be 2 minutes </span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>declare</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'> StockTick</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> @role( event )</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> @expires( 1m )</span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>end</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'> </span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> </span></font><o:p></o:p></p>
<p><font size=2 color=olive face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:olive'># One can even declare helper facts to
make rules easier and</span></font><o:p></o:p></p>
<p><font size=2 color=olive face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:olive'># simpler to write and maintain</span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>declare</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'> Statistics</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> symbol : String
@key()</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> average : </span></font><b><font
size=2 color="#960000" face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:#960000;font-weight:bold'>double</span></font></b><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> readings : </span></font><b><font
size=2 color="#960000" face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:#960000;font-weight:bold'>int</span></font></b><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> total : </span></font><b><font
size=2 color="#960000" face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:#960000;font-weight:bold'>double</span></font></b><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>end</span></font></b><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>rule</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'> </span></font><font size=2 color=green
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:green'>"Setup statistics"</span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>when</span></font></b><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> $c : Company( $s : symbol )</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><b><font
size=2 color="#960000" face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:#960000;font-weight:bold'>not</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'>( Statistics( symbol == $s ) )</span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>then</span></font></b><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> Statistics s = </span></font><b><font
size=2 color="#960000" face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:#960000;font-weight:bold'>new</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'> Statistics();</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> s.symbol = $s;</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> s.readings = s.readings +
1;</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><b><font
size=2 color="#960000" face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:#960000;font-weight:bold'>insert</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'>( s );</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> </span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>end</span></font></b><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> </span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> </span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> </span></font><o:p></o:p></p>
<p><font size=2 color=olive face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:olive'># a simple rule to show that it is
possible to join</span></font><o:p></o:p></p>
<p><font size=2 color=olive face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:olive'># events from an entry-point (stream)
with facts </span></font><o:p></o:p></p>
<p><font size=2 color=olive face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:olive'># present in the working memory</span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>rule</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'> </span></font><font size=2 color=green
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:green'>"Update stock stats"</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><b><font
size=2 color="#960000" face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:#960000;font-weight:bold'>agenda-group</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'> </span></font><font size=2 color=green
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:green'>"evaluation"</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><b><font
size=2 color="#960000" face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:#960000;font-weight:bold'>lock-on-active</span></font></b><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>when</span></font></b><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> $cp : Company( $sb :
symbol )</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> $st : StockTick(
symbol == $sb, $pr : price ) </span></font><b><font size=2 color="#960000"
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:#960000;font-weight:bold'>from</span></font></b><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> entry-point </span></font><font size=2 color=green
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:green'>"StockTick stream"</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> </span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> $stats :
Statistics( symbol == $sb )</span></font><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> </span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>then</span></font></b><o:p></o:p></p>
<p><font size=2 face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New"'> </span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><b><font
size=2 color="#960000" face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:#960000;font-weight:bold'>modify</span></font></b><font
size=2 color=black face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:black'>( $stats ) { readings = readings + 1};</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'>
System.err.println($stats.symbol + </span></font><font size=2 color=green
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:green'>"readings: "</span></font><font size=2 color=black
face="Courier New"><span style='font-size:10.0pt;font-family:"Courier New";
color:black'> + $stats.readings);</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>// This shows an update on working memory facts with
data from joined events</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>//modify( $cp ) { currentPrice = $pr }</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>// Although events are considered immutable, a
common pattern is to use a class</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>// to represent an event and enrich that event
instance with data derived from other facts/events.</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>// Bellow we "enrich" the event instance
with the percentual change in the price, </span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>// based on the previous price</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>//modify( $st ) { delta = $cp.delta }</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>//modify( $st ) { readings = 5 }</span></font><o:p></o:p></p>
<p><font size=2 color=black face="Courier New"><span style='font-size:10.0pt;
font-family:"Courier New";color:black'> </span></font><font
size=2 color=olive face="Courier New"><span style='font-size:10.0pt;font-family:
"Courier New";color:olive'>//System.out.println($st.delta)</span></font><o:p></o:p></p>
<p><b><font size=2 color="#960000" face="Courier New"><span style='font-size:
10.0pt;font-family:"Courier New";color:#960000;font-weight:bold'>end</span></font></b><o:p></o:p></p>
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