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Use a global variable.<div><br></div><div>In your java code use a property file and the "inject" to drools using the setGlobal method() of your session.</div><div><br></div><div>session.setGlobal("maxBalance", 100) </div><div><br></div><div>and in your drl<br><br></div><div><br></div><div>global java.lang.Integer maxBalance;</div><div><br></div><div><p class="ecxMsoNormal" style="text-indent: 0in !important; margin-top: 0em !important; margin-right: 0em !important; margin-bottom: 0em !important; margin-left: 0em !important; padding-top: 0em !important; padding-right: 0em !important; padding-bottom: 0em !important; padding-left: 0em !important; ">rule “basic rule”</p><p class="ecxMsoNormal" style="text-indent: 0in !important; margin-top: 0em !important; margin-right: 0em !important; margin-bottom: 0em !important; margin-left: 0em !important; padding-top: 0em !important; padding-right: 0em !important; padding-bottom: 0em !important; padding-left: 0em !important; "> when</p><p class="ecxMsoNormal" style="text-indent: 0in !important; margin-top: 0em !important; margin-right: 0em !important; margin-bottom: 0em !important; margin-left: 0em !important; padding-top: 0em !important; padding-right: 0em !important; padding-bottom: 0em !important; padding-left: 0em !important; "> Account($balance : balance < maxBalance)</p><p class="ecxMsoNormal" style="text-indent: 0in !important; margin-top: 0em !important; margin-right: 0em !important; margin-bottom: 0em !important; margin-left: 0em !important; padding-top: 0em !important; padding-right: 0em !important; padding-bottom: 0em !important; padding-left: 0em !important; "> then </p><p class="ecxMsoNormal" style="text-indent: 0in !important; margin-top: 0em !important; margin-right: 0em !important; margin-bottom: 0em !important; margin-left: 0em !important; padding-top: 0em !important; padding-right: 0em !important; padding-bottom: 0em !important; padding-left: 0em !important; "> System.out.println(“Account balance: “ + $balance + “ is less than " + maxBalance.toString() );</p><p class="ecxMsoNormal" style="text-indent: 0in !important; margin-top: 0em !important; margin-right: 0em !important; margin-bottom: 0em !important; margin-left: 0em !important; padding-top: 0em !important; padding-right: 0em !important; padding-bottom: 0em !important; padding-left: 0em !important; "> end</p><div><br></div><hr id="stopSpelling">From: gmacgregor@pocketkings.ie<br>To: rules-users@lists.jboss.org<br>Date: Mon, 8 Feb 2010 18:11:57 +0000<br>Subject: [rules-users] Dynamic Rules<br><br>
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<p class="ecxMsoNormal">Hi All,</p>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal">Just getting started using Drools and I have a question
about dynamic rules. I have written a simple application based on one of the
tutorials.</p>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal"><b>Rule:</b></p>
<p class="ecxMsoNormal">rule “basic rule”</p>
<p class="ecxMsoNormal"> when</p>
<p class="ecxMsoNormal"> Account($balance
: balance < 100)</p>
<p class="ecxMsoNormal"> then
</p>
<p class="ecxMsoNormal"> System.out.println(“Account
balance: “ + $balance + “ is less than 100“);</p>
<p class="ecxMsoNormal"> end</p>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal">This rule works fine in my test application but is there a
way to replace the static 100 with a dynamic value like, AccountRulesConfig.lowBalance,
basically testing against the value of another object rather than a static
value?</p>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal">Thanks</p>
<p class="ecxMsoNormal"> </p>
<p class="ecxMsoNormal"> Glenn </p>
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