[rules-users] Drools as a Webservice

Hi, I am new to the Drools , i wanted to expose rules as a webservice using Axis2. what i have done is that 1. I have created a drools Project (working fine on eclispe) export all files in jar 2. Placed the jar file in C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\axis2\WEB-INF\lib directory 3. Created a new Dynamic java project with axis2 facet.created a class with ** package in.abhi.ws; import java.math.BigDecimal; import org.drools.KnowledgeBase; import org.drools.KnowledgeBaseFactory; import org.drools.builder.KnowledgeBuilder; import org.drools.builder.KnowledgeBuilderError; import org.drools.builder.KnowledgeBuilderErrors; import org.drools.builder.KnowledgeBuilderFactory; import org.drools.builder.ResourceType; import org.drools.io.ResourceFactory; import org.drools.runtime.StatefulKnowledgeSession; import com.sample.SaleItem; public class Test { private static KnowledgeBase readKnowledgeBase() throws Exception { KnowledgeBuilder kbuilder = KnowledgeBuilderFactory .newKnowledgeBuilder(); kbuilder.add(ResourceFactory.newClassPathResource("KanasSalesTax.drl"), ResourceType.DRL); KnowledgeBuilderErrors errors = kbuilder.getErrors(); if (errors.size() > 0) { for (KnowledgeBuilderError error : errors) { System.err.println(error); } throw new IllegalArgumentException("Could not parse knowledge."); } KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); kbase.addKnowledgePackages(kbuilder.getKnowledgePackages()); return kbase; } public BigDecimal salesTax(String taxState, String typeItem) { BigDecimal taxCal = null; try { // load up the knowledge base KnowledgeBase kbase = readKnowledgeBase(); StatefulKnowledgeSession ksession = kbase .newStatefulKnowledgeSession(); // Non-prescription item // Expect $1.89 for the tax SaleItem item1 = new SaleItem(); item1.setPurchaseState(taxState); item1.setItemType(typeItem); item1.setSalesPrice(new BigDecimal(29.95)); ksession.insert(item1); ksession.fireAllRules(); taxCal = item1.getSalesTax(); System.out.println(item1.getPurchaseState().toString() + " " + item1.getItemType().toString() + ": " + item1.getSalesTax().toString()); } catch (Throwable t) { t.printStackTrace(); } return taxCal; } } ** 4. Then created a bottom up java bean webservice of it using the same above class. 5. Wsdl is generated i am getting the error response on eclispe console while testing by soap-ui ********** java.lang.NullPointerException at org.drools.util.CompositeClassLoader.getResourceAsStream(CompositeClassLoader.java:122) at org.drools.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:234) at org.drools.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:215) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createPackage(LookupEnvironment.java:748) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.buildTypeBindings(CompilationUnitScope.java:87) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.buildTypeBindings(LookupEnvironment.java:167) at org.eclipse.jdt.internal.compiler.Compiler.internalBeginToCompile(Compiler.java:721) at org.eclipse.jdt.internal.compiler.Compiler.beginToCompile(Compiler.java:381) at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:426) at org.drools.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:358) at org.drools.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:49) at org.drools.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:369) at org.drools.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:53) at org.drools.compiler.PackageRegistry.compileAll(PackageRegistry.java:71) at org.drools.compiler.PackageBuilder.compileAll(PackageBuilder.java:869) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:826) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:404) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:586) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:37) at in.abhi.ws.Test.readKnowledgeBase(Test.java:31) at in.abhi.ws.Test.salesTax(Test.java:55) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:212) at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:117) at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40) at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:110) at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181) at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:172) at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:146) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) java.lang.NullPointerException at org.drools.util.CompositeClassLoader.getResourceAsStream(CompositeClassLoader.java:122) at org.drools.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:234) at org.drools.commons.jci.compilers.EclipseJavaCompiler$2.findType(EclipseJavaCompiler.java:215) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.createPackage(LookupEnvironment.java:748) at org.eclipse.jdt.internal.compiler.lookup.CompilationUnitScope.buildTypeBindings(CompilationUnitScope.java:87) at org.eclipse.jdt.internal.compiler.lookup.LookupEnvironment.buildTypeBindings(LookupEnvironment.java:167) at org.eclipse.jdt.internal.compiler.Compiler.internalBeginToCompile(Compiler.java:721) at org.eclipse.jdt.internal.compiler.Compiler.beginToCompile(Compiler.java:381) at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:426) at org.drools.commons.jci.compilers.EclipseJavaCompiler.compile(EclipseJavaCompiler.java:358) at org.drools.commons.jci.compilers.AbstractJavaCompiler.compile(AbstractJavaCompiler.java:49) at org.drools.rule.builder.dialect.java.JavaDialect.compileAll(JavaDialect.java:369) at org.drools.compiler.DialectCompiletimeRegistry.compileAll(DialectCompiletimeRegistry.java:53) at org.drools.compiler.PackageRegistry.compileAll(PackageRegistry.java:71) at org.drools.compiler.PackageBuilder.compileAll(PackageBuilder.java:869) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:826) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:404) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:586) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:37) at in.abhi.ws.Test.readKnowledgeBase(Test.java:31) at in.abhi.ws.Test.salesTax(Test.java:55) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.apache.axis2.rpc.receivers.RPCUtil.invokeServiceClass(RPCUtil.java:212) at org.apache.axis2.rpc.receivers.RPCMessageReceiver.invokeBusinessLogic(RPCMessageReceiver.java:117) at org.apache.axis2.receivers.AbstractInOutMessageReceiver.invokeBusinessLogic(AbstractInOutMessageReceiver.java:40) at org.apache.axis2.receivers.AbstractMessageReceiver.receive(AbstractMessageReceiver.java:110) at org.apache.axis2.engine.AxisEngine.receive(AxisEngine.java:181) at org.apache.axis2.transport.http.HTTPTransportUtils.processHTTPPostRequest(HTTPTransportUtils.java:172) at org.apache.axis2.transport.http.AxisServlet.doPost(AxisServlet.java:146) at javax.servlet.http.HttpServlet.service(HttpServlet.java:641) at javax.servlet.http.HttpServlet.service(HttpServlet.java:722) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98) at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579) at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:307) at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) at java.lang.Thread.run(Unknown Source) **************** Please let me know how to make it work -- View this message in context: http://drools.46999.n3.nabble.com/Drools-as-a-Webservice-tp3950198.html Sent from the Drools: User forum mailing list archive at Nabble.com.