[rules-users] Drools 5 - how create Logger for Template File based rules?

[chris@twc]

Wolfgang, is this correct? Thx

<pre>
    // populate working memory
    ExternalSpreadsheetCompiler converter = new
ExternalSpreadsheetCompiler();
    InputStream spreadsheetStream = ...
    InputStream templateFileStream = ...
    String drl = converter.compile(spreadsheetStream, templateFileStream, 3,
3);
    Resource drlResource = ResourceFactory.newReaderResource(new
StringReader(drl));
    KnowledgeBuilder kbuilder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
    kbuilder.add(drlResource, ResourceType.DRL);
    KnowledgeBuilderErrors errors = kbuilder.getErrors();
    if (errors.size() > 0) {
        for (KnowledgeBuilderError error: errors) {
            System.err.println(error);
        }
        throw new IllegalStateException("Could not parse knowledge from
template example");
    }
    KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
    knowledgeBase.addKnowledgePackages(kbuilder.getKnowledgePackages());
    // create session
    StatefulKnowledgeSession rulesSession =
knowledgeBase.newStatefulKnowledgeSession();
    KnowledgeRuntimeLogger rulesLogger =
KnowledgeRuntimeLoggerFactory.newConsoleLogger(rulesSession);
//&lt;&lt;CREATE LOGGER!
    FactHandle factHandle = rulesSession.insert(myFact);
    // fire the rules
    rulesSession.fireAllRules();
</pre>


Wolfgang Laun-2 wrote:
> 
> You can use a KnowledgeBuilder with template-derived DRL-resources and set
> up your KnowledgeBase from its results the same way you do it with plain
> .drl-files. Obtain a StatefulKnaowledgeSession and pass this to
> the KnowledgeRuntimeLoggerFactory, as in your first code sample.
> -W
> 
> 
> On 6/30/09, chris at twc <christopher.mcfarland at twc.state.tx.us> wrote:
>>
>> I'm trying to figure out how I can create a Logger to log rule
>> activations
>> for my Template File code. I followed the examples to successfully create
>> a
>> Logger for DRL and Decision Table examples. Apparently, to create a
>> Logger,
>> the KnowledgeRuntimeLoggerFactory methods take a
>> KnowledgeRuntimeEventManager type, which
>> *StatefulKnowledgeSession*implements. But, for the Template File
>> examples, the
>> *StatefulSession* from the "unstable" drools-core *does not* implement
>> this interface. SEE the code examples below - how do I create a Logger
>> for
>> my Template File code?
>>
>> //#### DRL FILE & EXCEL FILE EXAMPLE FOR CREATING A SESSION AND FIRING
>> THE
>> RULES:
>> //#### CREATING A RULES LOGGER WORKS
>>
>> // populate working memory
>> KnowledgeBuilder kbuilder =
>> KnowledgeBuilderFactory.newKnowledgeBuilder();
>> kbuilder.add(...[DRL or DTABLE resources]...);
>> KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
>> knowledgeBase.addKnowledgePackages(kbuilder.getKnowledgePackages());
>> // create session
>> StatefulKnowledgeSession rulesSession =
>> knowledgeBase.newStatefulKnowledgeSession();
>> KnowledgeRuntimeLogger rulesLogger =
>> KnowledgeRuntimeLoggerFactory.newConsoleLogger(rulesSession); //<<*CREATE
>> LOGGER!*
>> FactHandle factHandle = rulesSession.insert(myFact);
>> // fire the rules
>> rulesSession.fireAllRules();
>>
>> //#### TEMPLATE FILE EXAMPLE FOR CREATING A SESSION AND FIRING THE RULES:
>> //#### CREATING A RULES LOGGER DOES NOT COMPILE!
>>
>> // populate working memory
>> ExternalSpreadsheetCompiler converter = new
>> ExternalSpreadsheetCompiler();
>> InputStream spreadsheetStream = ...
>> InputStream templateFileStream = ...
>> String drl = converter.compile(spreadsheetStream, templateFileStream, 3,
>> 3);
>> PackageBuilder builder = new PackageBuilder();
>> builder.addPackageFromDrl(new StringReader(drl));
>> RuleBase templateRuleBase = RuleBaseFactory.newRuleBase();
>> templateRuleBase.addPackage(builder.getPackage());
>> // create session
>> StatefulSession rulesSession = templateRuleBase.newStatefulSession();
>> KnowledgeRuntimeLogger rulesLogger =
>> KnowledgeRuntimeLoggerFactory.newConsoleLogger(rulesSession);//<<*DOESN'T
>> COMPILE!*
>> FactHandle factHandle = rulesSession.insert(myFact);
>> // fire the rules
>> rulesSession.fireAllRules();
>>
>>
>> ------------------------------
>> View this message in context: Drools 5 - how create Logger for Template
>> File based
>> rules?<http://www.nabble.com/Drools-5---how-create-Logger-for-Template-File-based-rules--tp24277191p24277191.html>
>> Sent from the drools - user mailing list
>> archive<http://www.nabble.com/drools---user-f11823.html>at Nabble.com.
>>
>>
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>>
>>
> 
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