Re: [rules-users] Errors in running the HelloWorldExample

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