[rules-users] Rules doubt

[Wolfgang Laun]

Here, I've found this for you, a comment from the Drools source file
org.drools.rule.builder.dialect.java.JavaDialectConfiguration

 * There are options to use various flavours of runtime compilers.
 * Apache JCI is used as the interface to all the runtime compilers.
 *
 * You can also use the system property "drools.compiler" to set the
desired compiler.
 * The valid values are "ECLIPSE" and "JANINO" only.
 *
 * drools.dialect.java.compiler = <ECLIPSE|JANINO>
 * drools.dialect.java.lngLevel = <1.5|1.6>
 *
 * The default compiler is Eclipse and the default lngLevel is 1.5.
 * The lngLevel will attempt to autodiscover your system using the
 * system property "java.version"
 *
 * The JavaDialectConfiguration will attempt to validate that the
specified compiler
 * is in the classpath, using ClassLoader.loasClass(String). If you intented to
 * just Janino sa the compiler you must either overload the compiler
property before
 * instantiating this class or the PackageBuilder, or make sure
Eclipse is in the
 * classpath, as Eclipse is the default.

Try it without the JANINO setting - it *should* flag the setter with
the incompatible types.

If you haven't used MVEL so far, I don't see any reason to start now.

-W


2010/5/4 Puneet duggal <duggalpunit at gmail.com>:
> @  Wolfgang Laun ,
>
> i am using just this statement:-
>
> javaConf.setCompiler( JavaDialectConfiguration.JANINO );
>
> I dont know the exact use of this statement .I  am not using the mvel
> , i tried to google abt it but couldnt find the use of this ...
> can u through some light on this.
>
> Thanks
>
>
> On 5/4/10, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:
>>
>> Actually, this kind of error isn't discovered by the Drools DRL compiler;
>> it would be flagged by the Java compiler. (You can verify: if you make the
>> same error in Java code, you'll get that error message.)
>>
>> But if you are using dialect "mvel" (are you?), this is not flagged as an
>> error, and it would silently convert the Double to a String, and set
>> fid31003 to "497.0". Is this what keeps your other rules from firing, i.e.,
>> the excess ".0"?
>>
>> I suggest that you do not use "mvel" unless there is a compelling reason
>> (in other rules). Even then, you might restrict use "mvel" to those rules
>> where it is really necessary.
>>
>> -W
>>
>>
>> 2010/5/4 Puneet duggal <duggalpunit at gmail.com>
>>>
>>> drlFile = BusinessRuleUtils.createCombinedDrlDocument(id,map.get(id));
>>>
>>>      PackageBuilder PACKAGE_BUILDER = new
>>> PackageBuilder(BUILDER_CONFIGURATION);
>>>      org.drools.rule.Package pkg = null;
>>>      PACKAGE_BUILDER
>>>        .addPackageFromDrl(new StringReader(drlFile));
>>>      if (PACKAGE_BUILDER.hasErrors()) {
>>>       DSM_LOGGER
>>>         .logFatal("Error has occured while building package. For
>>> Parameter ID : "
>>>           + id
>>>           + " Error details are : "
>>>           + PACKAGE_BUILDER.getErrors()
>>>             .toString());
>>>      } else {
>>>       pkg = PACKAGE_BUILDER.getPackage();
>>>       RULEBASE.addPackage(pkg);
>>>       DSM_LOGGER
>>>         .logInfo("Package created for Component Prmr ID : "
>>>           + id);
>>>      }
>>>
>>>
>>>
>>> This is the code which i am using  at it is not giving
>>> any error  at the time creating  the drl file.it is also
>>> not giving any error at the time of calling of execute()
>>> method , but rules are not executed .
>>>
>>> On 5/4/10, Wolfgang Laun <wolfgang.laun at gmail.com> wrote:
>>>>
>>>> Anatoly,
>>>>
>>>> please note that I wrote "please" to Puneet, which is usually not
>>>> considered
>>>> as being "impolite". Also, kindly note that I asked for more
>>>> information, which,
>>>> in my book, is not "inconsiderate", as simply deleting Puneet's post
>>>> might have been.
>>>>
>>>> I do resent being called a "hater", and I'll let the community judge
>>>> whether
>>>> my (admittedly ironic) kidding is "hateful". Somehow, however, posters
>>>> have to
>>>> be admonished to state their problem more detailed, without people on
>>>> the
>>>> list having to waste their time playing guessing games or writing
>>>> replies begging
>>>> for more information.
>>>>
>>>> -W
>>>>
>>>> PS: A you can see now, it was not a question of "debugging", and so you
>>>> have wasted
>>>> your time on a "simple question". :-)
>>>>
>>>>
>>>> On Tue, May 4, 2010 at 5:10 AM, tolitius <webakaunt at gmail.com> wrote:
>>>>>
>>>>>
>>>>> @Wolfgang,
>>>>>
>>>>>    No need to be a hater Wolfgang, the question is simple. I agree,
>>>>> examples would be helpful, but that is NOT how you grow a friendly
>>>>> community.
>>>>>
>>>>>    Community is the biggest problem JBoss has. Why is it so inhumanly
>>>>> difficult to be polite and considerate?
>>>>>
>>>>> /Anatoly
>>>>>
>>>>> --
>>>>> View this message in context:
>>>>> http://drools-java-rules-engine.46999.n3.nabble.com/Rules-doubt-tp774023p775029.html
>>>>> 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
>>>>
>>>>
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>>
>>
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