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Hi,<br>
<br>
If it is not the case already, could you try adding the
"drools-ide-common" jar (along with its dependencies) to the classpath
of your project?<br>
Best regards,<br>
<br>
Bruno.<br>
<br>
John Peterson a écrit :
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<title>Unable to find implementation for BusinessRuleProvider</title>
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<p dir="ltr"><span lang="en-us"><font face="Calibri">Hi,</font></span></p>
<p dir="ltr"><span lang="en-us"><font face="Calibri">I</font></span><span
lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font
face="Calibri">ve been experimenting with</font></span><span
lang="en-us"> <font face="Calibri">the</font> <font face="Calibri">Guided
Rule Editor plug-in in E</font><font face="Calibri">clipse. I</font></span><span
lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font
face="Calibri">ve built a</font> <font face="Calibri">Drools Project
using the default Hello World sample application.</font></span><span
lang="en-us"><font face="Calibri"> I</font></span><span lang="en-us"><font
face="Calibri">’</font></span><span lang="en-us"><font face="Calibri">ve
created a new</font></span><span lang="en-us"> <font face="Calibri">“</font></span><span
lang="en-us"><font face="Calibri">Guided Rule</font></span><span
lang="en-us"><font face="Calibri">”</font></span><span lang="en-us"><font
face="Calibri"> in my project called</font></span><span lang="en-us"> <font
face="Calibri">“</font></span><span lang="en-us"><font face="Calibri">GuidedRule.brl</font></span><span
lang="en-us"><font face="Calibri">”</font></span><span lang="en-us"><font
face="Calibri"> and get</font> <font face="Calibri">the associated</font></span><span
lang="en-us"> <font face="Calibri">“</font></span><span lang="en-us"><font
face="Calibri">drools.package</font></span><span lang="en-us"><font
face="Calibri">”</font></span><span lang="en-us"><font face="Calibri">
with it. The rule is simple:</font></span></p>
<p dir="ltr"><span lang="en-us"><font face="Calibri">WHEN</font></span></p>
<p dir="ltr"><span lang="en-us"><font face="Calibri">THEN</font></span></p>
<p dir="ltr"><span lang="en-us"><font face="Calibri">
System.out.println(</font></span><span lang="en-us"><font face="Calibri">“</font></span><span
lang="en-us"><font face="Calibri">Rule</font><font face="Calibri"> has
fired</font></span><span lang="en-us"><font face="Calibri">”</font></span><span
lang="en-us"><font face="Calibri">);</font></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"><font face="Calibri">I build the
knowledge base as follows:</font></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> </span><span
lang="en-us"></span><span lang="en-us"><b> <font color="#7f0055"
face="Courier New" size="2">private</font></b></span><span lang="en-us"></span><span
lang="en-us"></span><span lang="en-us"></span><span lang="en-us"><b> <font
color="#7f0055" face="Courier New" size="2">static</font></b></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2"> KnowledgeBase readKnowledgeBase()</font></span><span
lang="en-us"></span><span lang="en-us"><b> <font color="#7f0055"
face="Courier New" size="2">throws</font></b></span><span lang="en-us"></span><span
lang="en-us"><font color="#000000" face="Courier New" size="2">
Exception {</font></span><span lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
<font color="#000000" face="Courier New" size="2">KnowledgeBuilder
kbuilder = KnowledgeBuilderFactory.</font></span><span lang="en-us"></span><span
lang="en-us"><i><font color="#000000" face="Courier New" size="2">newKnowledgeBuilder</font></i></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2">();</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
<font color="#000000" face="Courier New" size="2">kbuilder.add(ResourceFactory.</font></span><span
lang="en-us"></span><span lang="en-us"><i><font color="#000000"
face="Courier New" size="2">newClassPathResource</font></i></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2">(</font></span><span lang="en-us"></span><span
lang="en-us"><font color="#2a00ff" face="Courier New" size="2">"SampleGuided.drl"</font></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2">), ResourceType.</font></span><span
lang="en-us"></span><span lang="en-us"><i><font color="#0000c0"
face="Courier New" size="2">BRL</font></i></span><span lang="en-us"></span><span
lang="en-us"><font color="#000000" face="Courier New" size="2">);</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
<font color="#000000" face="Courier New" size="2">KnowledgeBuilderErrors
errors = kbuilder.getErrors();</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
</span><span lang="en-us"></span><span lang="en-us"><b> <font
color="#7f0055" face="Courier New" size="2">if</font></b></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2"> (errors.size() > 0) {</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
</span><span lang="en-us"></span><span lang="en-us"><b> <font
color="#7f0055" face="Courier New" size="2">for</font></b></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2"> (KnowledgeBuilderError error: errors) {</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
<font color="#000000" face="Courier New"
size="2">System.</font></span><span lang="en-us"></span><span
lang="en-us"><i><font color="#0000c0" face="Courier New" size="2">err</font></i></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2">.println(error);</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
<font color="#000000" face="Courier New" size="2">}</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
</span><span lang="en-us"></span><span lang="en-us"><b> <font
color="#7f0055" face="Courier New" size="2">throw</font></b></span><span
lang="en-us"></span><span lang="en-us"></span><span lang="en-us"></span><span
lang="en-us"><b> <font color="#7f0055" face="Courier New" size="2">new</font></b></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2"> IllegalArgumentException(</font></span><span
lang="en-us"></span><span lang="en-us"><font color="#2a00ff"
face="Courier New" size="2">"Could not parse knowledge."</font></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2">);</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
<font color="#000000" face="Courier New" size="2">}</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
<font color="#000000" face="Courier New" size="2">KnowledgeBase
kbase = KnowledgeBaseFactory.</font></span><span lang="en-us"></span><span
lang="en-us"><i><font color="#000000" face="Courier New" size="2">newKnowledgeBase</font></i></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2">();</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
<font color="#000000" face="Courier New" size="2">kbase.addKnowledgePackages(kbuilder.getKnowledgePackages());</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us">
</span><span lang="en-us"></span><span lang="en-us"><b> <font
color="#7f0055" face="Courier New" size="2">return</font></b></span><span
lang="en-us"></span><span lang="en-us"><font color="#000000"
face="Courier New" size="2"> kbase;</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#000000" face="Courier New" size="2">}</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"><font face="Calibri">The only line
changed is adding the resource of type BRL</font></span><span
lang="en-us">.</span></p>
<p dir="ltr"><span lang="en-us"><font face="Calibri">When I try to
run, I get the</font><font face="Calibri"> following</font> <font
face="Calibri">error:</font></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"><u><font
color="#000080" face="Courier New" size="2">java.lang.Ru</font><font
color="#000080" face="Courier New" size="2">ntimeException</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">:</font></span><span lang="en-us"></span><span
lang="en-us"><u> <font color="#000080" face="Courier New" size="2">org.drools.compiler.DroolsParserException</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">:</font></span><span lang="en-us"></span><span
lang="en-us"><u> <font color="#000080" face="Courier New" size="2">org.drools.CheckedDroolsException</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">: Unable to find implementation for
BusinessRuleProvider</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
org.drools.compiler.PackageBuilder.addKnowledgeResource(</font></span><span
lang="en-us"></span><span lang="en-us"><u><font color="#000080"
face="Courier New" size="2">PackageBuilder.java:544</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
org.drools.builder.impl.KnowledgeBuilderImpl.add(</font></span><span
lang="en-us"></span><span lang="en-us"><u><font color="#000080"
face="Courier New" size="2">KnowledgeBuilderImpl.java:28</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
com.sample.DroolsTest.readKnowledgeBase(</font></span><span lang="en-us"></span><span
lang="en-us"><u><font color="#000080" face="Courier New" size="2">DroolsTest.java:41</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
com.sample.DroolsTest.main(</font></span><span lang="en-us"></span><span
lang="en-us"><u><font color="#000080" face="Courier New" size="2">DroolsTest.java:23</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"><font
color="#ff0000" face="Courier New" size="2">Caused by:</font></span><span
lang="en-us"></span><span lang="en-us"><u> <font color="#000080"
face="Courier New" size="2">org.drools.compiler.DroolsParserException</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">:</font></span><span lang="en-us"></span><span
lang="en-us"><u> <font color="#000080" face="Courier New" size="2">org.</font><font
color="#000080" face="Courier New" size="2">drools.CheckedDroolsException</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">: Unable to find implementation for
BusinessRuleProvider</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
org.drools.compiler.PackageBuilder.addPackageFromBrl(</font></span><span
lang="en-us"></span><span lang="en-us"><u><font color="#000080"
face="Courier New" size="2">PackageBuilder.java:386</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
org.drools.compiler.PackageBuilder.addKnowledgeResource(</font></span><span
lang="en-us"></span><span lang="en-us"><u><font color="#000080"
face="Courier New" size="2">PackageBuilder.java:470</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">..</font><font
color="#ff0000" face="Courier New" size="2">. 3 more</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"><font
color="#ff0000" face="Courier New" size="2">Caused by:</font></span><span
lang="en-us"></span><span lang="en-us"><u> <font color="#000080"
face="Courier New" size="2">org.drools.CheckedDroolsException</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">: Unable to find implementation for
BusinessRuleProvider</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
org.drools.compiler.BusinessRuleProviderFactory.throwNoImplementationFound(</font></span><span
lang="en-us"></span><span lang="en-us"><u><font color="#000080"
face="Courier New" size="2">BusinessRuleProviderFactory.java:66</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
org.drools.compiler.Busine</font><font color="#ff0000"
face="Courier New" size="2">ssRuleProviderFactory.loadProvider(</font></span><span
lang="en-us"></span><span lang="en-us"><u><font color="#000080"
face="Courier New" size="2">BusinessRuleProviderFactory.java:42</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
org.drools.compiler.BusinessRuleProviderFactory.getProvider(</font></span><span
lang="en-us"></span><span lang="en-us"><u><font color="#000080"
face="Courier New" size="2">BusinessRuleProviderFactory.java:25</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">at
org.drools.compiler.PackageBuilder.addPackageFromBrl(</font></span><span
lang="en-us"></span><span lang="en-us"><u><font color="#000080"
face="Courier New" size="2">PackageBuilder.java:366</font></u></span><span
lang="en-us"></span><span lang="en-us"><font color="#ff0000"
face="Courier New" size="2">)</font></span><span lang="en-us"></span><span
lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span><span lang="en-us"> <font
color="#ff0000" face="Courier New" size="2">... 4 more</font></span><span
lang="en-us"></span><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"></span></p>
<p dir="ltr"><span lang="en-us"><font face="Calibri">I</font></span><span
lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font
face="Calibri">ve tried variations to add the drools.package as a</font>
<font face="Calibri">PKG type,</font></span><span lang="en-us"> <font
face="Calibri">I</font><font face="Calibri">’</font></span><span
lang="en-us"><font face="Calibri">ve had the rules</font> <font
face="Calibri">(and package)</font> <font face="Calibri">i</font><font
face="Calibri">n</font><font face="Calibri"> both</font></span><span
lang="en-us"> <font face="Calibri">“</font></span><span lang="en-us"><font
face="Calibri">com.sample</font></span><span lang="en-us"><font
face="Calibri">”</font></span><span lang="en-us"><font face="Calibri">
and /src/main/rules</font><font face="Calibri">, but I can</font></span><span
lang="en-us"><font face="Calibri">’</font></span><span lang="en-us"><font
face="Calibri">t seem to resolve the problem. </font></span><span
lang="en-us"> <font face="Calibri">“</font></span><span lang="en-us"><font
face="Calibri">drools.package</font></span><span lang="en-us"><font
face="Calibri">”</font></span><span lang="en-us"><font face="Calibri">
has been updated to include the package name (package com.sample;)</font></span><span
lang="en-us"><font face="Calibri"> and I import the message class as
well (even though it isn</font></span><span lang="en-us"><font
face="Calibri">’</font></span><span lang="en-us"><font face="Calibri">t
being used currently).</font></span></p>
<p dir="ltr"><span lang="en-us"><font face="Calibri">I suspect the
issue is simple, but I haven</font></span><span lang="en-us"><font
face="Calibri">’</font></span><span lang="en-us"><font face="Calibri">t
been able to figure it out. Any help would be appreciat</font><font
face="Calibri">ed.</font></span></p>
<p dir="ltr"><span lang="en-us"></span></p>
<pre wrap="">
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