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>
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
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
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
</pre>
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16 years
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
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
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
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
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
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
