Re: [rules-users] adding process to an empty rule base

This error is caused by a mismatch between the version of the mvel library you are using and the version that is expected by drools. Drools 4.0.0 is expecting mvel14-1.2rc1.jar. Previous versions of drools are probably based on older versions of mvel. Might also be caused by having multiple versions of mvel in your classpath. Kris ----- Original Message ----- From: "hypnosat7" <ablarbi(a)yahoo.fr&gt; To: <rules-users(a)lists.jboss.org&gt; Sent: Friday, July 27, 2007 5:30 PM Subject: Re: [rules-users] adding process to an empty rule base > > > I try this: > ... > InputStream stream = > getClass().getResourceAsStream("/rules/demoRuleFlow.rfm"); > Reader ruleFlowReader = new InputStreamReader(stream); > ruleEngine.setRuleFlow(ruleFlowReader); > .. > > PackageBuilder builder = new PackageBuilder(); > builder.addRuleFlow(ruleFlow); > Package pkgRuleFlow = builder.getPackage(); > ruleBase.addPackage(pkgRuleFlow); > > but I have this error: > Caused by: java.lang.NoSuchMethodError: > org.mvel.optimizers.OptimizerFactory.setDefaultOptimizer(Ljava/lang/String;)V > at > org.drools.rule.builder.dialect.mvel.MVELDialect.init(MVELDialect.java:132) > at org.drools.compiler.DialectRegistry.initAll(DialectRegistry.java:49) > at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:139) > at org.drools.compiler.PackageBuilder.<init>(PackageBuilder.java:88) > > > > Kris Verlaenen wrote: >> >> Yes, that is possible, but you should also add the (generated) package >> of >> your PackageBuilder. >> >> But this process is actually much simpler when using the ProcessBuilder >> exclusively. >> It should look something like this: >> >> PackageBuilder builder = new PackageBuilder(); >> // add your rules (if any) >> builder.addPackageFromDrl( ... ); >> // add your processes (if any) >> builder.addRuleFlow( ... ); >> // add Package to ruleBase >> Package pkg = builder.getPackage(); // this includes all the rules and >> processes >> ruleBase.addPackage( pkg ); >> >> Kris >> >> ----- Original Message ----- >> From: "hypnosat7" <ablarbi(a)yahoo.fr&gt; >> To: <rules-users(a)lists.jboss.org&gt; >> Sent: Friday, July 27, 2007 3:59 PM >> Subject: [rules-users] adding process to an empty rule base >> >> >>> >>> Is it possible to set the rule flow in my rule base before adding rule >>> packages : >>> >>> ruleBase = RuleBaseFactory.newRuleBase(); >>> org.drools.compiler.ProcessBuilder processBuilder = new >>> ProcessBuilder(new >>> PackageBuilder()); >>> processBuilder.addProcessFromFile(ruleFlow); >>> ruleBase.addProcess(processBuilder.getProcesses()[0]); >>> >>> thanks >>> -- >>> View this message in context: >>> http://www.nabble.com/adding-process-to-an-empty-rule-base-tf4157978.html... >>> Sent from the drools - user mailing list archive at Nabble.com. >>> >>> _______________________________________________ >>> rules-users mailing list >>> rules-users(a)lists.jboss.org >>> https://lists.jboss.org/mailman/listinfo/rules-users >> >> _______________________________________________ >> rules-users mailing list >> rules-users(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> > > -- > View this message in context: > http://www.nabble.com/adding-process-to-an-empty-rule-base-tf4157978.html... > Sent from the drools - user mailing list archive at Nabble.com. > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users