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The consequence will be null if the java you used is invalid. When you
create the Package check the errors before adding it to the rule base
as you can get a lot more info. In fact thats good "best practice"
always verify that the package errors are emtpy before attempting to
use the package.<br>
<br>
Mark<br>
Manukyan, Sergey wrote:
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<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Hi,</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">I am using
JBoss Rules 4.0.0.11754MR2 in
an RAD 7.0 (Eclipse 3.2) environment.</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Cannot make
it work, even examples…</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Here is a
message produces on all rules:</span></font><font color="red"
face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;"> The
rule called </span></font><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"><here
goes rule name></span></font><font color="red" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;"> is
not valid. Check for compile errors reported.</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Here is a
full stack trace:</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal" style=""><font color="red" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">Exception
in thread "main" </span></font><u><font color="navy" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: navy;">java.lang.IllegalArgumentException</span></font></u><font
color="red" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">: The
rule called Hello World is not valid. Check for compile errors
reported.</span></font></p>
<p class="MsoNormal" style=""><font color="red" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">
at
org.drools.common.AbstractRuleBase.addRule(</span></font><u><font
color="navy" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: navy;">AbstractRuleBase.java:363</span></font></u><font
color="red" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">)</span></font></p>
<p class="MsoNormal" style=""><font color="red" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">
at
org.drools.reteoo.ReteooRuleBase.addRule(</span></font><u><font
color="navy" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: navy;">ReteooRuleBase.java:263</span></font></u><font
color="red" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">)</span></font></p>
<p class="MsoNormal" style=""><font color="red" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">
at
org.drools.common.AbstractRuleBase.addPackage(</span></font><u><font
color="navy" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: navy;">AbstractRuleBase.java:293</span></font></u><font
color="red" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">)</span></font></p>
<p class="MsoNormal" style=""><font color="red" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">
at
org.drools.examples.HelloWorldExample.readRule(</span></font><u><font
color="navy" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: navy;">HelloWorldExample.java:72</span></font></u><font
color="red" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">)</span></font></p>
<p class="MsoNormal" style=""><font color="red" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">
at
org.drools.examples.HelloWorldExample.main(</span></font><u><font
color="navy" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: navy;">HelloWorldExample.java:21</span></font></u><font
color="red" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: red;">)</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">After
digging it further I found that in
Rule class method isValid is being called defiend as followes:</span></font></p>
<p class="MsoNormal" style=""><font color="black" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;"> </span></font></p>
<p class="MsoNormal" style=""><font color="black" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">
</span></font><b><font color="#7f0055" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">public</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;"> </span></font><b><font
color="#7f0055" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">boolean</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;"> <span
style="background: silver none repeat scroll 0%; -moz-background-clip: -moz-initial; -moz-background-origin: -moz-initial; -moz-background-inline-policy: -moz-initial;">isValid</span>()
{</span></font></p>
<p class="MsoNormal" style=""><font face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New";"> </span></font></p>
<p class="MsoNormal" style=""><font color="black" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">
</span></font><b><font color="#7f0055" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">if</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;"> ( </span></font><b><font
color="#7f0055" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">this</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">.</span></font><font
color="#0000c0" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(0, 0, 192);">consequence</span></font><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;"> ==
</span></font><b><font color="#7f0055" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">null</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;"> ||
!isSemanticallyValid() ) {</span></font></p>
<p class="MsoNormal" style=""><font color="black" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">
</span></font><b><font color="#7f0055" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">return</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;"> </span></font><b><font
color="#7f0055" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">false</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">;</span></font></p>
<p class="MsoNormal" style=""><font color="black" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">
}</span></font></p>
<p class="MsoNormal" style=""><font face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New";"> </span></font></p>
<p class="MsoNormal" style=""><font color="black" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">
</span></font><b><font color="#7f0055" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">return</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;"> </span></font><b><font
color="#7f0055" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">true</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">;</span></font></p>
<p class="MsoNormal" style=""><font color="black" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">
}</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">The debugger
shows that </span></font><b><font color="#7f0055" face="Courier New"
size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(127, 0, 85); font-weight: bold;">this</span></font></b><font
color="black" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: black;">.</span></font><font
color="#0000c0" face="Courier New" size="2"><span
style="font-size: 10pt; font-family: "Courier New"; color: rgb(0, 0, 192);">consequence
</span></font><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">is null
always! So rules
are always not valid.</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Anyone saw
this problem? Any idea how to
resolve it?</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">Thanks a lot!</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;">-Sergey</span></font></p>
<p class="MsoNormal"><font color="navy" face="Arial" size="2"><span
style="font-size: 10pt; font-family: Arial; color: navy;"> </span></font></p>
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