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<div><font face="Arial" size="2">Hi everybody,</font></div>
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<div><font face="Arial" size="2">I followed all the topics about globals and the fact that they are immutables.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">I also understood that once we decide to reason over globals, it's</font></div>
<div><font face="Arial" size="2">time we no more use them and we start to use simple WM facts.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Now...</font></div>
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<div><font face="Arial" size="2">I tell you my scenario.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">I have got two globals.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">A "request" global and a "reply" global. The first one is a "Request" java instance </font></div>
<div><font face="Arial" size="2">and the second one is a "Reply" java instance. They belong to the Object model</font></div>
<div><font face="Arial" size="2">I designed.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">My application makes a request to the rule engine passing it a "request" as global,<br>and get back a reply from it receiving a modified "reply" global.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">I use a ruleflow to execute the rules.</font></div>
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<div><font face="Arial" size="2">I think everything would be perfect and smooth if I had not the need to reason</font></div>
<div><font face="Arial" size="2">over the reply during the rule session....</font></div>
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<div><font face="Arial" size="2"><strong>That's the point!</strong></font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">I do not just need to modify the "reply" global in order to get the final value <u>outside</u></font></div>
<div><font face="Arial" size="2"><u>the rule engine</u>, but I DO need to reason over it <u>INSIDE</u> the rule session.</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2"><strong>So.... what should I do in order to reason over the reply <u>INSIDE AND OUTSIDE</u> </strong></font></div>
<div><font face="Arial" size="2"><strong>the Rule Session?</strong></font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Should I insert the "reply" global into the WM?</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Let assume I do that, what happen if I pass the "reply" global to</font></div>
<div><font face="Arial" size="2">a drools function which alters the "reply"?</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Imagine a rule as follows and imagine I previously inserted the "reply" global into the WM:</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">----</font></div>
<div><font face="Arial" size="2">...</font></div>
<div><font face="Arial" size="2">global my.object.model.Reply reply</font></div>
<div><font face="Arial" size="2">...</font></div>
<div><font face="Arial" size="2">rule "addcriminal_2_reply"</font></div>
<div><font face="Arial" size="2"> when</font></div>
<div><font face="Arial" size="2"> $p: Person(job=="criminal")</font></div>
<div><font face="Arial" size="2"> then</font></div>
<div><font face="Arial" size="2"> addCriminaltoReply(reply, $p );</font></div>
<div><font face="Arial" size="2">end</font></div>
<div><font face="Arial" size="2">----</font></div>
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<div><font face="Arial" size="2">Will this alteration affect the corresponding Reply() fact in the WM as well?</font></div>
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<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">Now let see this other rule:</font></div>
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<div><font face="Arial" size="2">(Same, let imagine i previously inserted: insert(reply); )</font></div>
<div><font face="Arial" size="2">----</font></div>
<div><font face="Arial" size="2">global my.object.model.Reply reply</font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">
<div><font face="Arial" size="2">rule "FullFill_replyCode"</font></div>
<div><font face="Arial" size="2"> when</font></div>
<div><font face="Arial" size="2"> $r: Reply(code=="john.wayne") from reply</font></div>
<div><font face="Arial" size="2"> then</font></div>
<div><font face="Arial" size="2"> $r.code.name = john;</font></div>
<div> $r.code.lastname = wayne;</div>
<div><font face="Arial" size="2">end</font></div>
<div><font face="Arial" size="2">----</font></div></font></div>
<div><font face="Arial" size="2"></font> </div>
<div><font face="Arial" size="2">If I execute this rule in a ruleflow, do i need to "update($r)"</font></div>
<div><font face="Arial" size="2">in order to get the modified $r value in the next ruleflow node?</font></div>
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<div><font face="Arial" size="2">And what happens to the global??? Will it get modified as well?</font></div>
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<div><font face="Arial" size="2">I am sure you can help me.</font></div>
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<div><font face="Arial" size="2">Bye bye.</font></div>
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<div><font face="Arial" size="2">Massi</font></div>
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