Are you working just with the Drools 4 version? Or you can jump to the Drools 5 version? On Mon, Nov 2, 2009 at 5:41 PM, Scott Stevenson < scott.stevenson(a)datacert.com&gt; wrote: -- - http://salaboy.wordpress.com - http://www.jbug.com.ar - Salatino "Salaboy" Mauricio -

Ok, so you need to start using the Drools 5 APIs. Please take a look at the Drools 5 documentation: http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/drools-flow/html... In the section 3.2 Using a Process in Your Application you will find the correct api's. Greetings. 2009/11/2 Scott Stevenson <scott.stevenson(a)datacert.com&gt; -- - http://salaboy.wordpress.com - http://www.jbug.com.ar - Salatino "Salaboy" Mauricio -

That are only the fluent api to create processes. I recommend you the other approach: KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add( ResourceFactory.newClassPathResource("MyProcess.rf"), ResourceType.DRF ); 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()); StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); ksession.startProcess("com.sample.MyProcess"); If you need the reference to the process instance you can do: WorkFlowProcessInstance processInstance = ksession.startProcess(...); Work 2009/11/2 Scott Stevenson <scott.stevenson(a)datacert.com&gt; -- - http://salaboy.wordpress.com - http://www.jbug.com.ar - Salatino "Salaboy" Mauricio -

Here is my attempt at using the Drools 5 API to execute my dynamically created Process: KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); org.drools.rule.Package p = new org.drools.rule.Package("sample"); p.addProcess(createProcess()); KnowledgePackageImp kpi = new KnowledgePackageImp(); kpi.pkg = p; List<KnowledgePackage> list = new ArrayList<KnowledgePackage>(); list.add(kpi); kbase.addKnowledgePackages(list); StatefulKnowledgeSession ksess = kbase.newStatefulKnowledgeSession(); ksess.startProcess("org.drools.sample.workflow.dynamic"); I still get the same null pointer error. Perhaps the problem is in my implementation of the Process API? The code under createProcess is this: RuleFlowProcessFactory factory = RuleFlowProcessFactory.createProcess("com.datacert.workflow.dynamic"); factory .name("HelloWorldRuleSet") .version("1.0") .packageName("org.drools") .startNode(1).name("Start").done() .actionNode(2) .name("Action") .action("java", "System.out.println(\"Inside Action 1\");").done() .endNode(3).name("End").done() .connection(1, 2) .connection(2, 3); return factory.validate().getProcess(); Thanks, Scott From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mauricio Salatino Sent: Monday, November 02, 2009 2:14 PM To: Rules Users List Subject: Re: [rules-users] How to execute a Process API result? That are only the fluent api to create processes. I recommend you the other approach: KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add( ResourceFactory.newClassPathResource("MyProcess.rf"), ResourceType.DRF ); 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()); StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); ksession.startProcess("com.sample.MyProcess"); If you need the reference to the process instance you can do: WorkFlowProcessInstance processInstance = ksession.startProcess(...); Work 2009/11/2 Scott Stevenson <scott.stevenson(a)datacert.com&gt; I read that section but I'm still not clear how to add my process (created like the section just before) to the KnowledgeBase. Section 3.2 shows adding an existing .rf file. I have this code: RuleFlowProcessFactory factory = RuleFlowProcessFactory.createProcess("org.drools.sample.workflow.dynamic "); factory .name("HelloWorldRuleSet") .version("1.0") .packageName("org.drools") .startNode(1).name("Start").done() .actionNode(2) .name("Action") .action("java", "System.out.println(\"Inside Action 1\");").done() .endNode(3).name("End").done() .connection(1, 2) .connection(2, 3); factory.validate().getProcess(); How does the getProcess() result get added to a KnowledgeBase? Thanks, Scott From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mauricio Salatino Sent: Monday, November 02, 2009 1:57 PM To: Rules Users List Subject: Re: [rules-users] How to execute a Process API result? Ok, so you need to start using the Drools 5 APIs. Please take a look at the Drools 5 documentation: http://downloads.jboss.com/drools/docs/5.0.1.26597.FINAL/drools-flow/htm l_single/index.html#d0e1375 In the section 3.2 Using a Process in Your Application you will find the correct api's. Greetings. 2009/11/2 Scott Stevenson <scott.stevenson(a)datacert.com&gt; I'm working with Drools 5. From: rules-users-bounces(a)lists.jboss.org [mailto:rules-users-bounces@lists.jboss.org] On Behalf Of Mauricio Salatino Sent: Monday, November 02, 2009 1:45 PM To: Rules Users List Subject: Re: [rules-users] How to execute a Process API result? Are you working just with the Drools 4 version? Or you can jump to the Drools 5 version? On Mon, Nov 2, 2009 at 5:41 PM, Scott Stevenson <scott.stevenson(a)datacert.com&gt; wrote: I'm trying to execute the result of the Process API and running into problems most likely stemming from my ignorance. I'm creating a new process following the sample code from section 3.1.3.2 of the User Guide. My sample process consists of: 1. StartNode 2. ActionNode that prints Hello World 3. EndNode What I don't understand is how to get my new process into a KnowledgeBase and KnowledgeSession for execution. I've tried the following (Drools 4 method, I believe) as well: AbstractRuleBase ruleBase = (AbstractRuleBase) RuleBaseFactory.newRuleBase(); ruleBase.addProcess(createProcess()); InternalWorkingMemory workingMemory = new ReteooWorkingMemory(1, ruleBase); workingMemory.startProcess("org.drools.sample.workflow.dynamic"); The result of the previous code is a RuntimeException (unable to execute Action). Inner exception is null pointer from inside the ActionNodeInstance class. Where am going wrong in implementing the Process API? Thank you, Scott Stevenson _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- - http://salaboy.wordpress.com - http://www.jbug.com.ar - Salatino "Salaboy" Mauricio - _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- - http://salaboy.wordpress.com - http://www.jbug.com.ar - Salatino "Salaboy" Mauricio - _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users -- - http://salaboy.wordpress.com - http://www.jbug.com.ar - Salatino "Salaboy" Mauricio -

Does changing the type of the id field from String to long fix your issue? Because to me it seems that MySQL is not accepting the name "id" as a valid column name? I guess changing the mapping so that it uses a different column name could fix the issue? Kris Quoting Vijay K Pandey <VPandey(a)mdes.ms.gov&gt;: Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

Best might indeed be to update the id to a long instead of a String. Also check out http://opensource.atlassian.com/projects/hibernate/browse/HB-1113 Could you open a JIRA for this? Kris Quoting Vijay K Pandey <VPandey(a)mdes.ms.gov&gt;: Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

Scott, A process is also "compiled" before it is executable. To load a process constructed using the API, either: * load it as any other process by transforming it to XML first using the XmlRuleFlowProcessDumper * compile the process before adding it to your rulebase, using ProcessBuilder.buildProcess(..) Kris Quoting Scott Stevenson <scott.stevenson(a)datacert.com&gt;: Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm

Hi All I am also trying to build a dynamic process to be used. I am having some difficulties in the build where I having this exception below is the sample code that I am using: java.lang.NoClassDefFoundError: sample/Process_sample_0 at sample.Process_sample_0Action0Invoker.execute(Process_sample_0Action0Invoker.java:20) Also I have a question can I use this dynamic process inside the GWT web console? and How? Please help in this issue public static final void main(String[] args) { try { KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase(); org.drools.rule.Package p = new org.drools.rule.Package("sample"); RuleFlowProcess process = createProcess(); p.addProcess(process); KnowledgePackageImp kpi = new KnowledgePackageImp(); kpi.pkg = p; List<KnowledgePackage> list = new ArrayList<KnowledgePackage>(); list.add(kpi); org.drools.compiler.PackageBuilder pbuilder = new PackageBuilder(); pbuilder.addPackage(p); org.drools.compiler.ProcessBuilder builder = new ProcessBuilder(pbuilder); builder.buildProcess(process, null); kbase.addKnowledgePackages(list); StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession(); System.out.println("=======>>> process.getId() ["+process.getId()+"]"); // starting the process ksession.startProcess( process.getId() ); ksession.fireAllRules(); } catch (Throwable t) { t.printStackTrace(); } } public static RuleFlowProcess createProcess() { String processName = "org.drools.HelloWorldJoinSplit"; RuleFlowProcessFactory factory = RuleFlowProcessFactory.createProcess(processName); factory // Header .name("HelloWorldJoinSplit") .version("1.0") .packageName("sample") // Nodes .startNode(1).name("Start").done() .actionNode(2).name("Action 1") .action("java", "System.out.println(\"Inside Action 1\")").done() .endNode(3).name("End").done() // Connections .connection(1, 2) .connection(2, 3); RuleFlowProcess process = factory.validate().getProcess(); System.out.println(" ====== >> ["+process.getId()+"]"); return process; } -- View this message in context: http://old.nabble.com/How-to-execute-a-Process-API-result--tp26169577p264... Sent from the drools - user mailing list archive at Nabble.com.

Thanks Scott for the help After using the code you provided the process worked fine. I just have another question : 1-Can we use the Dynamic process with the GWT web console? 2-If we can, How? and If we cant, Is there an alternative to use dynamic process with GWT web console? -- View this message in context: http://old.nabble.com/How-to-execute-a-Process-API-result--tp26169577p264... Sent from the drools - user mailing list archive at Nabble.com.