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

[hypnosat7]

thanks, it works but now I have this :
Caused by: java.lang.NullPointerException
	at
org.drools.compiler.PackageBuilder.addRuleFlowsToPackage(PackageBuilder.java:469)
	at org.drools.compiler.PackageBuilder.getPackage(PackageBuilder.java:449)



Kris Verlaenen wrote:
> 
> 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 at yahoo.fr>
> To: <rules-users at lists.jboss.org>
> 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 at yahoo.fr>
>>> To: <rules-users at lists.jboss.org>
>>> 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#a11829714
>>>> Sent from the drools - user mailing list archive at Nabble.com.
>>>>
>>>> _______________________________________________
>>>> rules-users mailing list
>>>> rules-users at lists.jboss.org
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>> _______________________________________________
>>> rules-users mailing list
>>> rules-users at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>>
>>
>> -- 
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>> http://www.nabble.com/adding-process-to-an-empty-rule-base-tf4157978.html#a11831502
>> Sent from the drools - user mailing list archive at Nabble.com.
>>
>> _______________________________________________
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>> https://lists.jboss.org/mailman/listinfo/rules-users 
> 
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> https://lists.jboss.org/mailman/listinfo/rules-users
> 
> 

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