<br> Hi<br><br> The description you have bellow is ambiguous, so I can't give you a definitive answer. But it seems to be that you don't need sliding windows for that. Simple temporal operators will do.<br><br>
> <font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">Secondly if the window is large and number of records coming
in is high then could there be a memory issue?<br> Yes, Drools does not manages persistence by itself. So, if your design must support more data than it would fit in your running environment memory, you need to design a solution that comprises persistence.<br>
<br></span></font><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">> Also since every record is getting stored in database, can I
not use the database directly instead of sliding window?</span></font><br> Yes, you can fetch data on demand from external sources, be it databases or anything else. Look at the "from" CE.<br><br> []s<br> Edson<br>
<br><br><div class="gmail_quote">2009/6/1 Bhushan Bhangale <span dir="ltr"><<a href="mailto:bhushan_bhangale@kaleconsultants.com">bhushan_bhangale@kaleconsultants.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-US">
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<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">I am using Drools 5. I am struggling to write rule for this
logic -</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">If a stock price changes more than 10% within an hour then
report the change.</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">I understand I have to use sliding window feature but unable
to write the rule.</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">For example I got an update for IBM stock @ </span></font><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">12:30</span></font><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> for price
100 and then another update IBM stock @ </span></font><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">12:35</span></font><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> for price
111. Since the time difference is within an hour and the change is also greater
than 10% I want to report this price change.</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">Stock class -</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">Public class Stock {</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> Private String stock;</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> Private double price;</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> Private Date time;</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> Private double priceChange;</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> Private Boolean highlight;</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">}</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">rule "Stock Price change more than 10% within an
hour"</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">when</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">then</span></font></p>
<p style="text-indent: 0.5in;"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">set the priceChange attribute of
Stock object</span></font></p>
<p style="text-indent: 0.5in;"><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">set highlight to true
</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">end</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">Secondly if the window is large and number of records coming
in is high then could there be a memory issue?</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">Also since every record is getting stored in database, can I
not use the database directly instead of sliding window?</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;">Thanks</span></font></p>
<p><font size="2" face="Arial"><span style="font-size: 10pt; font-family: Arial;"> </span></font></p>
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<p><b><font color="#4e81c4" size="1" face="Verdana"><span style="font-size: 8pt; font-family: Verdana; color: rgb(78, 129, 196); font-weight: bold;">Mr.
Bhangale Bhushan</span></font></b><font color="#4e81c4" size="1" face="Verdana"><span style="font-size: 8pt; font-family: Verdana; color: rgb(78, 129, 196);"><br>
<i><span style="font-style: italic;">Associate Manager</span></i><br>
<b><b><font face="Verdana"><span style="font-family: Verdana;">Kale
Consultants Ltd.</span></font></b></b><br>
<a href="mailto:bhushan_bhangale@kaleconsultants.com" target="_blank"><font color="#4e81c4"><span style="color: rgb(78, 129, 196); text-decoration: none;">bhushan_bhangale@kaleconsultants.com</span></font></a><br>
tel: <a href="http://www.plaxo.com/click_to_call?lang=en&src=jj_signature&To=%2B91+%280%29206+608+3777&Email=bhushan_bhangale@kaleconsultants.com" title="Click to call. Cheap rates & no headset required!" target="_blank"><font color="#4e81c4"><span style="color: rgb(78, 129, 196); text-decoration: none;">+91 (0)206
608 3777</span></font></a><br>
<a href="http://www.kaleconsultants.com" target="_blank"><font color="#4e81c4"><span style="color: rgb(78, 129, 196); text-decoration: none;">http://www.kaleconsultants.com</span></font></a>
</span></font></p>
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<p><font size="3" face="Times New Roman"><span style="font-size: 12pt;"> </span></font></p>
</div>
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</pre><br></div>
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<br></blockquote></div><br><br clear="all"><br>-- <br> Edson Tirelli<br> JBoss Drools Core Development<br> JBoss, a division of Red Hat @ <a href="http://www.jboss.com">www.jboss.com</a><br>