Using drools.halt() is not considered a good practice at all. I would recommend you to read this post: <a href="http://ilesteban.wordpress.com/2012/11/16/about-drools-and-infinite-execution-loops/">http://ilesteban.wordpress.com/2012/11/16/about-drools-and-infinite-execution-loops/</a><div>
<br></div><div>Best Regards,</div><div class="gmail_extra"><br clear="all"><div><br>XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX<br><br>Esteban Aliverti<br>- Blog @ <a href="http://ilesteban.wordpress.com" target="_blank">http://ilesteban.wordpress.com</a></div>
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<br><br><div class="gmail_quote">On Fri, Dec 7, 2012 at 8:59 AM, Hushen Savani <span dir="ltr"><<a href="mailto:hushen.savani@elitecore.com" target="_blank">hushen.savani@elitecore.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal">Hi,<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"> I have a simple rule as following:<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">import
java.util.HashMap;<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""><u></u> <u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">rule
"first"<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">when<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> a
: CrestelRuleModel( $hmap : singleHashMap!=null);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">then<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> System.out.println("Old
Map: " + $hmap);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> HashMap
mapp = new HashMap();<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> mapp.put("hello",
"world");<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> a.setSingleHashMap(mapp);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> System.out.println("New
Map: " + a.getSingleHashMap());<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> update(a);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">end;<u></u><u></u></span></b></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">When I invoke the rule from my client, the rule is executed <b>infinitely</b>.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">So, I have placed a “<b>drools.halt()</b>”
before “<b>end</b>” statement of above rule. So, it stopped executing
infinitely as I wanted. But <b><i>is it a good practice?</i></b><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Now, I want my input to be filtered by <b>two rules</b>, so
I have placed rules like following:<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">import
java.util.HashMap;<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""><u></u> <u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">rule
"first"<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">when<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> a
: CrestelRuleModel( $hmap : singleHashMap!=null);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">then<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> System.out.println("Old
Map: " + $hmap);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> HashMap
mapp = new HashMap();<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> mapp.put("hello",
"world");<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> a.setSingleHashMap(mapp);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> System.out.println("New
Map: " + a.getSingleHashMap());<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> update(a);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> drools.halt();<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">end;<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""><u></u> <u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">rule
"second"<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">when<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> b
: CrestelRuleModel( $hmap2 : singleHashMap!=null);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">then<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> System.out.println("Old
Map2: " + $hmap2);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> HashMap
mapp2 = new HashMap();<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> mapp2.put("hello2",
"world2");<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> b.setSingleHashMap(mapp2);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> System.out.println("New
Map2: " + b.getSingleHashMap());<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> update(b);<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New""> drools.halt();<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-size:12.0pt;font-family:"Courier New"">end;<u></u><u></u></span></b></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">But in above case, <b>only the “second” rule executes</b>.
What to do in order to execute both the rules without any infinite loop?<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal">Kindly share some pointers on this. Thanks.<u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><b>PS</b><span style="font-size:9.0pt">: </span><b><span style="font-size:9.0pt;font-family:"Courier New"">CrestelRuleModel</span></b><span style="font-size:9.0pt"> is my POJO model having following fields,<u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Courier New""><u></u> <u></u></span></b></p>
<p class="MsoNormal" style="text-autospace:none"><b><span style="font-size:8.0pt;font-family:"Courier New";color:#7f0055">public</span></b><span style="font-size:8.0pt;font-family:"Courier New""> </span><b><span style="font-size:8.0pt;font-family:"Courier New";color:#7f0055">class</span></b><span style="font-size:8.0pt;font-family:"Courier New""> CrestelRuleModel
{</span><span style="font-size:8.0pt;font-family:"Courier New""><u></u><u></u></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:8.0pt;font-family:"Courier New""> </span><span style="font-size:8.0pt;font-family:"Courier New""><u></u><u></u></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:8.0pt;font-family:"Courier New""> </span><b><span style="font-size:8.0pt;font-family:"Courier New";color:#7f0055">private</span></b><span style="font-size:8.0pt;font-family:"Courier New""> <u>ArrayList</u>
</span><span style="font-size:8.0pt;font-family:"Courier New";color:#0000c0">arrayListOfHashMap</span><span style="font-size:8.0pt;font-family:"Courier New"">;</span><span style="font-size:8.0pt;font-family:"Courier New""><u></u><u></u></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:8.0pt;font-family:"Courier New""> </span><b><span style="font-size:8.0pt;font-family:"Courier New";color:#7f0055">private</span></b><span style="font-size:8.0pt;font-family:"Courier New""> <u>HashMap</u> </span><span style="font-size:8.0pt;font-family:"Courier New";color:#0000c0">singleHashMap</span><span style="font-size:8.0pt;font-family:"Courier New"">;</span><span style="font-size:8.0pt;font-family:"Courier New""><u></u><u></u></span></p>
<p class="MsoNormal" style="text-autospace:none"><span style="font-size:8.0pt;font-family:"Courier New""> </span><b><span style="font-size:8.0pt;font-family:"Courier New";color:#7f0055">private</span></b><span style="font-size:8.0pt;font-family:"Courier New""> Object </span><span style="font-size:8.0pt;font-family:"Courier New";color:#0000c0">object</span><span style="font-size:8.0pt;font-family:"Courier New"">;</span><span style="font-size:8.0pt;font-family:"Courier New""><u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> </span><b><span style="font-size:8.0pt;font-family:"Courier New";color:#7f0055">private</span></b><span style="font-size:8.0pt;font-family:"Courier New""> String </span><span style="font-size:8.0pt;font-family:"Courier New";color:#0000c0">remarks</span><span style="font-size:8.0pt;font-family:"Courier New"">;<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""> //Getters and Setters<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Courier New"">}</span><span style="font-size:9.0pt"><u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
<p class="MsoNormal"><span lang="EN-IN" style="font-size:9.0pt;color:#1f497d">Best
Regards<u></u><u></u></span></p>
<p class="MsoNormal"><b><span lang="EN-IN" style="color:#1f497d">Hushen Savani</span></b><span lang="EN-IN" style="color:#1f497d"> | Crestel Billing<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:#1f497d"><img width="221" height="25" src="cid:image001.png@01CDD47E.EEC2BD00" alt="ecTag"></span><u></u><u></u></p>
<p class="MsoNormal"><u></u> <u></u></p>
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