Sir,<br><br>I want to run a simple drools example i.e. HelloWorldExample from command line<br><br style="font-weight: bold;"><span style="font-weight: bold;">My HelloWorldExample.java---></span><br><br><br style="font-style: italic;"><span style="font-style: italic;">import java.io.InputStreamReader;</span><br style="font-style: italic;"><span style="font-style: italic;">import java.io.Reader;</span><br style="font-style: italic;"><span style="font-style: italic;">import org.drools.RuleBase;</span><br style="font-style: italic;"><span style="font-style: italic;">import org.drools.RuleBaseFactory;</span><br style="font-style: italic;"><span style="font-style: italic;">import org.drools.WorkingMemory;</span><br style="font-style: italic;"><span style="font-style: italic;">import org.drools.compiler.PackageBuilder;</span><br style="font-style: italic;"><span style="font-style: italic;">import org.drools.rule.Package;</span><br style="font-style: italic;"><span
style="font-style: italic;">import org.drools.compiler.PackageBuilderConfiguration;</span><br style="font-style: italic;"><span style="font-style: italic;">import org.drools.compiler.*;</span><br style="font-style: italic;"><span style="font-style: italic;">import java.lang.String;</span><br style="font-style: italic;"><span style="font-style: italic;">import java.io.*;</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;">/**</span><br style="font-style: italic;"><span style="font-style: italic;"> * This is a sample file to launch a rule package from a rule source file.</span><br style="font-style: italic;"><span style="font-style: italic;"> */</span><br style="font-style: italic;"><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;">public class HelloWorldExample </span><br style="font-style: italic;"><span style="font-style: italic;">{</span><br style="font-style:
italic;"><br style="font-style: italic;"><span style="font-style: italic;"> public static final void main(final String[] args) </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> try </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> //load up the rulebase</span><br style="font-style: italic;"><span style="font-style: italic;"> final RuleBase ruleBase = loadRules();</span><br style="font-style: italic;"><span style="font-style: italic;">
final WorkingMemory workingMemory = ruleBase.newWorkingMemory();</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> //go !</span><br style="font-style: italic;"><span style="font-style: italic;"> final Message message = new Message();</span><br style="font-style: italic;"><span style="font-style: italic;"> message.setMessage( "Hello World " );</span><br style="font-style: italic;"><span style="font-style: italic;"> message.setStatus( Message.HELLO );</span><br style="font-style: italic;"><span style="font-style: italic;"> workingMemory.assertObject( message );</span><br style="font-style:
italic;"><span style="font-style: italic;"> workingMemory.fireAllRules();</span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> } </span><br style="font-style: italic;"><span style="font-style: italic;"> catch ( final Throwable t ) </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> t.printStackTrace();</span><br style="font-style: italic;"><span style="font-style: italic;"> }</span><br style="font-style: italic;"><span style="font-style:
italic;"> }</span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> public static RuleBase loadRules() </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> RuleBase ruleBase=null;</span><br style="font-style: italic;"><span style="font-style: italic;"> try </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> String [] ruleFiles = new String
[1]; </span><br style="font-style: italic;"><span style="font-style: italic;"> ruleFiles[0] = "HelloWorld.drl";</span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> PackageBuilderConfiguration pkgBuilderCfg = new PackageBuilderConfiguration();</span><br style="font-style: italic;"><span style="font-style: italic;">
pkgBuilderCfg.setCompiler(PackageBuilderConfiguration.JANINO);</span><br style="font-style: italic;"><span style="font-style: italic;"> PackageBuilder builder = new PackageBuilder(pkgBuilderCfg);</span><br style="font-style: italic;"><span style="font-style: italic;"> for( int i = 0, j = ruleFiles.length; i<j; i++ )</span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> builder.addPackageFromDrl(new InputStreamReader(HelloWorldExample.class.getResourceAsStream( ruleFiles[i] )) ); //HelloWorldExample.class.getResourceAsStream( "HelloWorld.drl" )</span><br style="font-style: italic;"><span
style="font-style: italic;"> //new InputStreamReader(getClass().getResourceAsStream( ruleFiles[i] ) )</span><br style="font-style: italic;"><span style="font-style: italic;"> }</span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> final Package pkg = builder.getPackage();</span><br style="font-style: italic;"><span style="font-style: italic;"> ruleBase = RuleBaseFactory.newRuleBase();</span><br style="font-style: italic;"><span style="font-style: italic;"> ruleBase.addPackage(pkg);</span><br style="font-style: italic;"><span
style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> } </span><br style="font-style: italic;"><span style="font-style: italic;"> catch (Exception fe) </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> fe.printStackTrace();</span><br style="font-style: italic;"><span style="font-style: italic;"> }</span><br style="font-style: italic;"><span style="font-style: italic;"> return
ruleBase;</span><br style="font-style: italic;"><span style="font-style: italic;"> }</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> /**</span><br style="font-style: italic;"><span style="font-style: italic;"> * Please note that this is the "low level" rule assembly API.</span><br style="font-style: italic;"><span style="font-style: italic;"> */</span><br style="font-style: italic;"><span style="font-style: italic;"> private static RuleBase readRule() throws Exception </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> //read in the source</span><br style="font-style: italic;"><span style="font-style: italic;">
final Reader source = new InputStreamReader( HelloWorldExample.class.getResourceAsStream( "HelloWorld.drl" ) );</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> //optionally read in the DSL (if you are using it).</span><br style="font-style: italic;"><span style="font-style: italic;"> //Reader dsl = new InputStreamReader( DroolsTest.class.getResourceAsStream( "/mylang.dsl" ) );</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> //Use package builder to build up a rule package.</span><br style="font-style: italic;"><span style="font-style: italic;"> //An alternative lower level class called "DrlParser" can also be used...</span><br style="font-style: italic;"><br style="font-style: italic;"><span
style="font-style: italic;"> final PackageBuilder builder = new PackageBuilder();</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> //this wil parse and compile in one step</span><br style="font-style: italic;"><span style="font-style: italic;"> //NOTE: There are 2 methods here, the one argument one is for normal DRL.</span><br style="font-style: italic;"><span style="font-style: italic;"> builder.addPackageFromDrl( source );</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> //Use the following instead of above if you are using a DSL:</span><br style="font-style: italic;"><span style="font-style: italic;">
//builder.addPackageFromDrl( source, dsl );</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> //get the compiled package (which is serializable)</span><br style="font-style: italic;"><span style="font-style: italic;"> final Package pkg = builder.getPackage();</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> //add the package to a rulebase (deploy the rule package).</span><br style="font-style: italic;"><span style="font-style: italic;"> final RuleBase ruleBase = RuleBaseFactory.newRuleBase();</span><br style="font-style: italic;"><span style="font-style: italic;"> ruleBase.addPackage( pkg );</span><br style="font-style: italic;"><span style="font-style:
italic;"> return ruleBase;</span><br style="font-style: italic;"><span style="font-style: italic;"> }</span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;"> public static class Message </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> public static final int HELLO = 0;</span><br style="font-style: italic;"><span style="font-style: italic;"> public static final int GOODBYE = 1;</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> private
String message;</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> private int status;</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> public String getMessage() </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> return this.message;</span><br style="font-style: italic;"><span style="font-style: italic;"> }</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style:
italic;"> public void setMessage(final String message) </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> this.message = message;</span><br style="font-style: italic;"><span style="font-style: italic;"> }</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> public int getStatus() </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> return this.status;</span><br style="font-style: italic;"><span
style="font-style: italic;"> }</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> public void setStatus(final int status) </span><br style="font-style: italic;"><span style="font-style: italic;"> {</span><br style="font-style: italic;"><span style="font-style: italic;"> this.status = status;</span><br style="font-style: italic;"><span style="font-style: italic;"> }</span><br style="font-style: italic;"><span style="font-style: italic;"> }</span><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;">}</span><br><br><span style="font-weight:
bold;">My HelloWorld.drl--></span><br><span style="font-style: italic;">package drools_test;</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;">import HelloWorldExample.*;</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;"> </span><br style="font-style: italic;"><span style="font-style: italic;">rule "Hello World"</span><br style="font-style: italic;"><span style="font-style: italic;"> when</span><br style="font-style: italic;"><span style="font-style: italic;"> m : Message( status == Message.HELLO, message : message )</span><br style="font-style: italic;"><span style="font-style: italic;"> then</span><br style="font-style: italic;"><span style="font-style: italic;"> System.out.println( message ); </span><br style="font-style: italic;"><span
style="font-style: italic;"> m.setMessage( "Goodbye cruel world" );</span><br style="font-style: italic;"><span style="font-style: italic;"> m.setStatus( Message.GOODBYE );</span><br style="font-style: italic;"><span style="font-style: italic;"> modify( m );</span><br style="font-style: italic;"><span style="font-style: italic;">end</span><br style="font-style: italic;"><br style="font-style: italic;"><span style="font-style: italic;">rule "GoodBye"</span><br style="font-style: italic;"><span style="font-style: italic;"> no-loop true</span><br style="font-style: italic;"><span style="font-style: italic;"> when</span><br style="font-style: italic;"><span style="font-style: italic;"> m : Message( status == Message.GOODBYE, message : message )</span><br style="font-style: italic;"><span
style="font-style: italic;"> then</span><br style="font-style: italic;"><span style="font-style: italic;"> System.out.println( message ); </span><br style="font-style: italic;"><span style="font-style: italic;"> m.setMessage( message );</span><br style="font-style: italic;"><span style="font-style: italic;">end<br><br></span>Now compilation works absolutely fine but when i am trying to run it some errors are coming<span style="font-style: italic;"><br><br>Warning: An error occurred compiling a semantic invoker. Errors should have been reported elsewhere.<br>Warning: An error occurred compiling a semantic invoker. Errors should have been reported elsewhere.<br>org.drools.rule.InvalidRulePackage: Rule Compilation error Class "HelloWorldExample.Message" not found Class "HelloWorldExample.Message" not found Class "java.lang.Object" has no method named "setMessage" Exception:0<br>Rule
Compilation error Class "HelloWorldExample.Message" not found Class "HelloWorldExample.Message" not found Class "java.lang.Object" has no method named "setMessage" Exception:0<br><br> at org.drools.rule.Package.checkValidity(Unknown Source)<br> at org.drools.common.AbstractRuleBase.addPackage(Unknown Source)<br> at HelloWorldExample.loadRules(HelloWorldExample.java:68)<br> at HelloWorldExample.main(HelloWorldExample.java:29)<br><br></span>I put all the jar files in the classpath. Please help me.<br><br>With regards,<br><br>Sudipta Deb. (+919831606520)<br>Kolkata,India<span style="font-style: italic;"><br></span><p> 
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