Re: [rules-users] creating and integrating a specific output using drools
by Fnu Mahalakshmi
Hi,
For using queries against the working memory : we do again need a knowledge of which query to fire against the working memory depending on which rule is fired. Also maintain a list of different queries which is ultimately written out to our output file.
Is there any way to determine this in our rule itself??
I could set a variable stating which query to be fired. But again I will be maintaining a lot of global variables then.
Any idea?? Any better solution???
Thanks
M
----------------------------------------------------------------------
Message: 2
Date: Fri, 18 Jun 2010 15:12:28 +0100
From: "Swindells, Thomas" <TSwindells(a)nds.com>
Subject: Re: [rules-users] creating and integrating a specific output
using drools
To: Rules Users List <rules-users(a)lists.jboss.org>
Message-ID:
<DAC86F5F3B84F14088F0DB16092558CA090238F5E7(a)UKMA1.UK.NDS.COM>
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Rather maintaining global lists have you looked into using queries against the working memory to get out what you need?
Thomas
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16 years, 1 month
Re: [rules-users] creating and integrating a specific output using drools
by Fnu Mahalakshmi
Hi,
No. I did not look into that. Thanks for the info.
Do you know of any documentation I could refer for the same??
Thank you.
M
Today's Topics:
1. creating and integrating a specific output using drools
(Fnu Mahalakshmi)
2. Re: creating and integrating a specific output using drools
(Swindells, Thomas)
3. Problems with OR (skasab2s)
4. Re: Problems with OR (David Sinclair)
5. Re: Problems with OR (Giovanni Motta)
----------------------------------------------------------------------
Message: 2
Date: Fri, 18 Jun 2010 15:12:28 +0100
From: "Swindells, Thomas" <TSwindells(a)nds.com>
Subject: Re: [rules-users] creating and integrating a specific output
using drools
To: Rules Users List <rules-users(a)lists.jboss.org>
Message-ID:
<DAC86F5F3B84F14088F0DB16092558CA090238F5E7(a)UKMA1.UK.NDS.COM>
Content-Type: text/plain; charset="us-ascii"
Rather maintaining global lists have you looked into using queries against the working memory to get out what you need?
Thomas
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16 years, 1 month
creating and integrating a specific output using drools
by Fnu Mahalakshmi
Hi,
I have my basic drools application up and running.
Now I have a very disconnected input file (i.e all data is very diff from each other)
As of now I am loading all the output data in a globallist and writing it to an output file.
Now all the global lists are separate for different data inputs that I provide.
Is there a more efficient way to do this rather than maintaining many global lists ???
Thank you.
M
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16 years, 1 month
Re: [rules-users] result of one rule to another rule
by Greg Barton
Yes. When you modify an existing working memory object or insert a new one the resulting objects can be matched by another rule. This in effect "passes" the data to the next rule, but it's not direct like a procedure call.
GreG
On Jun 17, 2010, at 11:03 PM, surabhi soni <surabhi.soni.4(a)gmail.com> wrote:
hiiii
can we pass result of one rule to another rule as input
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16 years, 1 month
Loading .brl files
by Fnu Mahalakshmi
Hi,
Does anyone have any idea as to how we can load .brl files which have been created using a dsl into the rulebase?
How do we convert them to a format understood by the rulebase?
Please help.
Thank you
M
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16 years, 1 month
Knowledge Builder error
by Fnu Mahalakshmi
Hi,
I am using the following code for adding DSLs to my knowledge base and I keep getting following error
My code :
private KnowledgeBase loadRules(String[] rules) throws Exception{
KnowledgeBuilder builder = KnowledgeBuilderFactory.newKnowledgeBuilder();
builder.add(ResourceFactory.newClassPathResource("/sample-dsl.dsl"),ResourceType.DSL);
builder.add(ResourceFactory.newClassPathResource("/Rule1.dslr"), ResourceType.DSLR);
if (builder.hasErrors()) {
throw new RuntimeException(builder.getErrors().toString());
}
KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages());
return knowledgeBase;
}
Error Stack:
Exception in thread "main" java.lang.NoSuchMethodError: org.drools.compiler.PackageBuilder.addKnowledgeResource(Lorg/drools/io/Resource;Lorg/drools/builder/ResourceType;Lorg/drools/builder/ResourceConfiguration;)V
at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:30)
at com.org.RuleRunner.loadRules(RuleRunner.java:51)
at com.org.RuleRunner.runStatelessRules(RuleRunner.java:127)
at com.org.RulesTest.main(RulesTest.java:41)
I have added all the required .jars for processing knowledge builder.
I have the drools-compiler.jar5.0.1 added to my classpath ( I downloaded it online)
Could you point me towards where I could download the correct drools-compiler and drools-core.jar files from?? Seems like the ones I have added to my classpath are not in harmony with each other.
Thank you. Please help.
M
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16 years, 1 month
Potential Job Opening for Core Drools Developer around Guvnor
by Mark Proctor
We are just finalising the details, but it looks like we may have a job
opening for a mid to senior java developer, to work with the Drools team
around Guvnor. I'm particulary interested in a London based developer,
who can work directly with me.
I'll post more details and a reference to the online details once they
become available. In the mean time, if you think you have what it takes,
send me an email.
Mark
16 years, 1 month
Working with DSL
by Fnu Mahalakshmi
Hi,
I am creating a DSL for my rules.
All my rules are business guided rules.
When using these business rules and loading them into the rule base : I need to convert them into .dslr rules.
I do know how to go about converting a .brl to a .drl file.
Can anyone give me a hint how to go about conversion of .brl to a .dslr file?
Thank you.
M
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16 years, 1 month
dsl error- please help
by Fnu Mahalakshmi
Hi guys,
I am trying to create a very basic dsl which is giving me the following error stack:
The code to add the dsl is as follows:
InputStream ruleSource = RuleRunner.class.getClassLoader().getResourceAsStream("/Rule1.dslr");
InputStream dslSource = RuleRunner.class.getClassLoader().getResourceAsStream("/sample-dsl.dsl");
//Load the rules , using DSL
addRulesToThisPackage.addPackageFromDrl(
new InputStreamReader(ruleSource),
new InputStreamReader(dslSource));
I have both the sample-dsl .dsl and Rule1.dslr in my working directory.
Error encountered at adding the dsl to the package (last line)
Error stack:
Exception in thread "main" java.lang.NullPointerException
at java.io.Reader.<init>(Unknown Source)
at java.io.InputStreamReader.<init>(Unknown Source)
at com.org.RuleRunner.loadRuleFile(RuleRunner.java:96)
at com.org.RuleRunner.loadRules(RuleRunner.java:48)
at com.org.RuleRunner.runStatelessRules(RuleRunner.java:109)
at com.org.RulesTest.main(RulesTest.java:41)
my dsl file has basic mapping as per the online documentations.
The dsl rule I created is:
expander sample-dsl.dsl
rule "A status changes B status"
when
There is an A
- has an address
There is a B
- has name
then
- print updated A and Aaddress
End
I have created DSL in eclipse.
Is the code I added for it to be loaded to my package correct?? Or am I missing something????
Please help.
Thanks.
M
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16 years, 1 month
