[rules-users] Guvnor and drools implementation - questions
ioda100
eddyhautot at gmail.com
Tue Mar 8 10:56:50 EST 2011
it's working for pkg, bad library
On Tue, Mar 8, 2011 at 4:30 PM, Eddy Hautot <eddyhautot at gmail.com> wrote:
> Hi Vincent,
>
> Thanks for precisions.
>
> Didn't knew only set/get are used. Get to be careful when i will have 100+
> attributes :-)
>
> Yes i created rueles with guided editor and it's working with my attribute.
> is there a way to remove "empty", "entrySet", "keySet", "clone",... herited
> from Map. So i would have only the attribute i have defined?
>
> Ok i will do like this for testing eval($m1 != $m2) ... i have put this in
> separate line to meke it clearer at the beginning.
>
> I think i will do your first option, rules will be clearer.
>
> i have always used drl file instead of package. If i deploy a file.pkg, is
> there a way to know what's in it? If i deploy something, i just want to be
> able later to very that all is well what i think if i have a doubt (easy
> with drl file).
>
> When i try to create my session i have problem with pkg. For know with .drl
> file i do with that :
>
> KnowledgeBase knowledgeBase = createKnowledgeBase();
> StatefulKnowledgeSession session =
> knowledgeBase.newStatefulKnowledgeSession();
>
> private static KnowledgeBase createKnowledgeBase() {
> final KnowledgeBuilder builder =
> KnowledgeBuilderFactory.newKnowledgeBuilder ();
>
>
> builder.add(ResourceFactory.newUrlResource("file:///d://basicRule.drl"),
> ResourceType.DRL);
> if (builder.hasErrors()) {
> throw new RuntimeException(builder.getErrors()
> .toString());
> }
> KnowledgeBase knowledgeBase =
> KnowledgeBaseFactory.newKnowledgeBase();
> knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages());
>
> return knowledgeBase;
> }
>
> If i replace the line :
> builder.add(ResourceFactory.newUrlResource("file:///d://basicRule.drl"),
> ResourceType.DRL);
> by :
> builder.add(ResourceFactory.newUrlResource("file:///d://PackageTest1.pkg"),
> ResourceType.PKG);
>
> but it's crashing :
> xception in thread "main" org.drools.RuntimeDroolsException: Unable to load
> dialect
> 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java:org.drools.rule.builder.dialect.java.JavaDialectConfiguration'
> at
> org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:283)
> at
> org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:268)
> at
> org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:181)
> at
> org.drools.compiler.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:154)
> at
> org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactoryServiceImpl.java:26)
> at
> org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactory.java:86)
> at TestMapPojoPackage.createKnowledgeBase(TestMapPojoPackage.java:86)
> at TestMapPojoPackage.main(TestMapPojoPackage.java:58)
> Caused by: java.lang.RuntimeException: The Janino jar is not in the
> classpath
> at
> org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setCompiler(JavaDialectConfiguration.java:100)
> at
> org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(JavaDialectConfiguration.java:55)
> at
> org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:279)
> ... 7 more
>
> Is it something special to do?
>
> Thanks again for your time
>
>
> On Mon, Mar 7, 2011 at 7:44 PM, Vincent Legendre [via Drools - Java Rules
> Engine] <ml-node+2647352-436278430-237284 at n3.nabble.com> wrote:
>
>> <html> <head> </head> <body text="#000000" bgcolor="#ffffff">
>>
>> I've just created 2 class like you show me with some changes to fit and
>> test all (timestamp are long in fact, i have put int, double and string as
>> well)
>>
>> In the second class you don't need the attributes as members, because
>> Drools uses get / set methods to deduce them, and anyway you never use them
>> as they are stored in the map.
>>
>> Then i have imported this in Guvnor.
>>
>> I have made 2 categories. I have put the model (jar) in the 2 categories.
>>
>> That is non-sense. Jars are not linked to a category but to a package.
>>
>> I have created 2 simple rules playing with the attributes id,
>> timestamp...
>>
>> With Guided editor ?
>>
>>
>>
>> 1) For the condition Map $m1 different then Map $m2. I suppose i have to
>> use the function define in MapPojo? I have to write it by hand using "free
>> from drl" : eval($m1 != $m2) ? or is there a better way?
>>
>> Its a way.
>> You can also test the id directly in conditions (in Guided editor, bind
>> the id of the first instance to a var, then compare it in the second
>> condition.
>>
>>
>> The same for testing that $m1 timestamp (Long) is befor $m2. I have to
>> write it by hand : eval($m1.isBefore($m2))? So they have to know it exist a
>> method isBefore if not said by the gui?
>>
>> Same. Add the test directly in the condition.
>> Another solution is to use a custom operator (search this mailing list for
>> samples).
>>
>> 2) In the code It's written MapTest1(..) instead of Map(...) so i
>> suppose drools has to do it with the precompiled package .pkg to know about
>> the MapPojo and MapTest1.. If i take only the .drl, drools won't know about
>> class MapTest1.
>>
>> It is MapTest1, because this is the class used .... and drools knows it
>> because it uses it ... You don't use Map directly anymore
>>
>>
>> Yes i can set a category to each of my rule.
>>
>> Yes you can !
>>
>> Do you mean create 4 categories (cat1, cat2, cat3, cat4) and for rules
>> of file1.drl, put them it cat1, for file2.drl, put them in cat2... ?
>>
>> Yes
>>
>> Set a first condition in the rules?
>>
>> Choose between categories and first condition. Don't use both
>>
>> Am i obliged to create a package per file and filter by category or is it
>> possible to make a package with all and filtering when creating the
>> knowledgeBase or something like that?
>>
>> You certainly can filter your KB afterwards, but this is not really an
>> out-of-the-box function. To me you have two options. For both options, you
>> have only one Guvnor package :*
>>
>> First option* : categories
>> set categories for your rules as you said
>> compile by filtering one category, do a snapshot. Redo the same for other
>> categories (in other snapshots).
>> Use these 4 snapshots in your code
>>
>> *Second option *: First filtering condition
>> create a new POJO having only one field to handle the task asked (or
>> category or group or file or whatever you call that) add a condition to all
>> your rules testing this fact according to their group (as described in one
>> of my previous mail)
>> create a single package (or use DRL) for all your rules.
>> when calling your rules, insert the suitable POJO according to tehexec you
>> want.
>>
>> The second is my favorite because it is less work to deploy, and your
>> number of rules are quite small. The second option can be change to use a
>> RuleFlow instead of a control fact.
>>
>>
>> </body> </html>
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