[rules-users] Facing Problem in BRL
Michael Anstis
michael.anstis at gmail.com
Wed May 18 05:59:40 EDT 2011
I just checked and when I create a new BRL rule drools.packages has the
comment on a single line.
I must assume there was some manual change made to introduce the error.
2011/5/18 Wolfgang Laun <wolfgang.laun at gmail.com>
> There is some code in 5.1.1
> org/drools/eclipse/rulebuilder/editors/RuleEditor.java
> that creates a file "drools.package" with
>
> if ( !file.exists() ) {
> String defaultHeader = "//This is a package
> configuration file";
> defaultHeader += "\n//Add imports, globals etc here
> which will be used by all the rule assets in this folder.";
> InputStream is = new ByteArrayInputStream(
> defaultHeader.getBytes() );
>
> Note the missing newline at the end of defaultHeader.
>
> -W
>
>
>
> 2011/5/18 Michael Anstis <michael.anstis at gmail.com>
>
>> //Add imports, globals etc here which will be used by all the rule assets
>> in this folder.
>>
>> should be on one line, or add another comment marker at the start of the
>> second line, e.g.:-
>>
>>
>> //Add imports, globals etc here which will be used by all the rule assets
>> in this folder.
>>
>> //Add imports, globals etc here which will be used by all the rule assets
>> // in this folder.
>>
>> 2011/5/18 Abhay B. Chaware <Abhay.Chaware at kpitcummins.com>
>>
>> I was able to reproduce your error … J try adding a new line ( enter )
>>> after the comment in the drools.package …. Or just remove the commented
>>> line “//Add imports, globals etc here which will be used by all the rule
>>> assets in this folder.”
>>>
>>>
>>>
>>> Your rule name is getting ‘commented out’ ………
>>>
>>>
>>>
>>> -abhay
>>>
>>> *-----------------------*
>>>
>>> * *
>>>
>>> * *
>>>
>>> * *
>>>
>>> *From:* rules-users-bounces at lists.jboss.org [mailto:
>>> rules-users-bounces at lists.jboss.org] *On Behalf Of *Michael Anstis
>>> *Sent:* Wednesday, May 18, 2011 2:53 PM
>>>
>>> *To:* Rules Users List
>>> *Subject:* Re: [rules-users] Facing Problem in BRL
>>>
>>>
>>>
>>> This looks rogue:-
>>>
>>> //Add imports, globals etc here which will be used by all the rule assets
>>> in this folder
>>>
>>> Can you post the content of your drools.packages file?
>>>
>>> On 18 May 2011 10:19, Sumeet Karawal <sumeet.karawal at tcs.com> wrote:
>>>
>>> This is the output that I get :
>>>
>>> //This is a package configuration file
>>>
>>> package com.rules;
>>>
>>> import com.model.PersonDetails;
>>>
>>> //Add imports, globals etc here which will be used by all the rule assets
>>> in this folder.rule "example"
>>> dialect "mvel"
>>> when
>>> $person : PersonDetails( age < "20" )
>>>
>>> then
>>> $person.setDiscount( 10 );
>>> end
>>>
>>> java.lang.RuntimeException: [8,1]: [ERR 102] Line 8:1 mismatched input
>>> 'WHEN'
>>>
>>> Regards,
>>> Sumeet Karawal
>>> Mailto: sumeet.karawal at tcs.com
>>>
>>>
>>>
>>> From: "Abhay B. Chaware" <Abhay.Chaware at kpitcummins.com>
>>>
>>> To: Rules Users List <rules-users at lists.jboss.org>
>>>
>>> Date: 05/18/2011 02:47 PM
>>>
>>>
>>> Subject: Re: [rules-users] Facing Problem in BRL
>>>
>>> Sent by: rules-users-bounces at lists.jboss.org
>>>
>>>
>>>
>>>
>>>
>>>
>>> Can you write the outputDRL to System.out and check if the generated DRL
>>> syntax is correct ?
>>>
>>> System.out.println(outputDRL);
>>>
>>> Before instantiating KnowledgeBuilder
>>>
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: rules-users-bounces at lists.jboss.org [
>>> mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Sumeet Karawal
>>> Sent: Wednesday, May 18, 2011 2:42 PM
>>> To: Rules Users List
>>> Subject: Re: [rules-users] Facing Problem in BRL
>>>
>>> I tried to use this also but now I am getting different error:
>>> java.lang.RuntimeException: [8,1]: [ERR 102] Line 8:1 mismatched input
>>> 'WHEN'
>>>
>>>
>>> Also, what is the significance of the first line. I have copied it as the
>>> same.
>>>
>>> My code is :
>>>
>>> String curDir = System.getProperty("user.dir");
>>> String fileName = curDir + "\\src\\com\\rules
>>> \\drools.package";
>>> String rulePackageContent =
>>> FileUtils.readFileToString(new
>>> File
>>> (fileName));
>>> fileName = curDir + "\\src\\com\\rules\\example.brl";
>>> String brl = FileUtils.readFileToString(new
>>> File(fileName));
>>> BRLPersistence read = BRXMLPersistence.getInstance();
>>> BRLPersistence write = BRDRLPersistence.getInstance();
>>> String outputDRL = rulePackageContent + write.marshal
>>> (read.unmarshal
>>> (brl));
>>> KnowledgeBuilder builder = KnowledgeBuilderFactory.
>>> newKnowledgeBuilder();
>>> builder.add(ResourceFactory.newReaderResource(new
>>> StringReader
>>> (outputDRL)), ResourceType.DRL);
>>>
>>>
>>> if (builder.hasErrors()) {
>>> throw new RuntimeException (builder.getErrors().toString ());
>>> }
>>> KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
>>> knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages ());
>>>
>>> I don't know where I am getting this wrong.
>>>
>>> Regards,
>>> Sumeet Karawal
>>> Mailto: sumeet.karawal at tcs.com
>>>
>>>
>>>
>>> From: "Abhay B. Chaware" <Abhay.Chaware at kpitcummins.com>
>>>
>>>
>>> To: Rules Users List <rules-users at lists.jboss.org>
>>>
>>>
>>> Date: 05/18/2011 01:09 PM
>>>
>>>
>>> Subject: Re: [rules-users] Facing Problem in BRL
>>>
>>>
>>> Sent by: rules-users-bounces at lists.jboss.org
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> I haven't been able to get "ResourceType.BRL" to work. This is how I do
>>> it ..
>>>
>>> String curDir = System.getProperty("user.dir");
>>> String fileName = curDir + "\\src\\main\\rules\\drools.package";
>>> String rulePackageContent = FileUtils.readFileToString(new
>>> File(fileName));
>>>
>>> fileName = curDir + "\\src\\main\\rules\\eligibility.brl";
>>> String brl = FileUtils.readFileToString(new File(fileName));
>>> BRLPersistence read = BRXMLPersistence.getInstance();
>>> BRLPersistence write = BRDRLPersistence.getInstance();
>>> String outputDRL = rulePackageContent +
>>> write.marshal(read.unmarshal(brl));
>>>
>>> KnowledgeBuilder kbuilder =
>>> KnowledgeBuilderFactory.newKnowledgeBuilder();
>>> kbuilder.add(ResourceFactory.newReaderResource(new StringReader
>>> (outputDRL)), ResourceType.DRL);
>>>
>>>
>>> Try this.
>>>
>>>
>>> -abhay
>>>
>>> -----Original Message-----
>>> From: rules-users-bounces at lists.jboss.org [
>>> mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Sumeet Karawal
>>> Sent: Wednesday, May 18, 2011 11:47 AM
>>> To: Rules Users List
>>> Subject: Re: [rules-users] Facing Problem in BRL
>>>
>>> This is the brl that I have created:
>>>
>>>
>>> (Embedded image moved to file: pic18001.jpg)
>>>
>>>
>>> Regards,
>>> Sumeet Karawal
>>> Mailto: sumeet.karawal at tcs.com
>>>
>>>
>>>
>>> From: "Abhay B. Chaware" <Abhay.Chaware at kpitcummins.com>
>>>
>>>
>>> To: Rules Users List <rules-users at lists.jboss.org>
>>>
>>>
>>> Date: 05/18/2011 11:42 AM
>>>
>>>
>>> Subject: Re: [rules-users] Facing Problem in BRL
>>>
>>>
>>> Sent by: rules-users-bounces at lists.jboss.org
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>> Could you post your rule content here ?
>>>
>>>
>>> -----Original Message-----
>>> From: rules-users-bounces at lists.jboss.org [
>>> mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Sumeet Karawal
>>> Sent: Wednesday, May 18, 2011 11:38 AM
>>> To: rules-users at lists.jboss.org
>>> Subject: [rules-users] Facing Problem in BRL
>>>
>>>
>>> Hi,
>>>
>>> I am using Drools-Expert. I am having a class "Person" with data members
>>> as
>>> age and discount.
>>> I am trying to create a .brl. I have these statements in drools.package
>>> package com.rules;
>>>
>>> import com.model.PersonDetails;
>>>
>>>
>>> and in the example.brl I am providing the details of when and then
>>> conditions
>>>
>>> but on execution I am getting the following error :
>>>
>>> java.lang.RuntimeException: [4] Unable to expand: PersonDetails( age <
>>> "20" )[6] Unable to expand:
>>> PersonDetails fact0 = new
>>> PersonDetails
>>> ();[7] Unable to expand:
>>> fact0.setDiscount
>>> ( 10 );[8] Unable to
>>> expand:
>>> insert(fact0 );
>>>
>>>
>>> It would be helpful is somebody guide me on how execute it.
>>>
>>> Also, I am creating the knowledgebase as:
>>>
>>> private static KnowledgeBase createKnowledgeBase() {
>>> KnowledgeBuilder builder =
>>> KnowledgeBuilderFactory.newKnowledgeBuilder();
>>> builder.add (ResourceFactory.newClassPathResource(
>>> "com/rules/example.brl"),ResourceType.BRL);
>>> if (builder.hasErrors()) {
>>> throw new RuntimeException (builder.getErrors().toString ());
>>> }
>>> KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
>>> knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages ());
>>> return knowledgeBase;}
>>>
>>>
>>> Thanks & Regards,
>>> Sumeet Karawal
>>> CEG - Open Source Technology Group
>>> Tata Consultancy Services
>>> Ph:- +912267782556
>>> Cell:- +919833236440
>>> Mailto: sumeet.karawal at tcs.com
>>> Website: http://www.tcs.com
>>> ____________________________________________
>>> Experience certainty.
>>> IT
>>> Services
>>>
>>> Business Solutions
>>>
>>> Outsourcing
>>> ____________________________________________
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>>
>> _______________________________________________
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>
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