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" <[EMAIL PROTECTED]>
To: <[email protected]>
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" <[EMAIL PROTECTED]>
To: <[email protected]>
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
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_______________________________________________
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https://lists.jboss.org/mailman/listinfo/rules-users
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