Wild card characters in .drl file
by hanumesh.m
Hi,
I need to use wild card chars matching in .drl file.
(Assume field filename has data as "XYZ-888-10022008")
If the filename contains string "888" in it
then target Queue will be "jms://INBOUND.888.EDI"
I am writing a rule as follows:
rule "Test 888"
no-loop
when
m: Message( fileName matches "*888*", message : message )
then
System.out.println( "In EATech.drl File" );
m.setTargetEdiQ("jms://INBOUND.888.EDI");
update( m );
end
But its not working. Error is "Dangling meta character '*' near index 0
*888*"
If anyone has used wild card chars in .drl file please respond
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16 years, 2 months
myemail
by Hanumesh Mekala
hanumesh.m(a)gmail.com
16 years, 2 months
Modify a global variable with mvel dialect
by Joshua Jackson
Dear all,
How do we modify a global variable with mvel dialect inside rules file
without getting
java.lang.UnsupportedOperationException: External Variable
identifer='allowance' type='class java.lang.Double' is final, it
cannot be set
[testng] at org.drools.base.mvel.DroolsMVELGlobalVariable.setValue(DroolsMVELGlobalVariable.java:37)
[testng] at
org.drools.base.mvel.DroolsMVELFactory.createVariable(DroolsMVELFactory.java:199)
[testng] at
org.mvel.ast.AssignmentNode.getReducedValueAccelerated(AssignmentNode.java:80)
[testng] at org.mvel.MVELRuntime.execute(MVELRuntime.java:88)
[testng] at
org.mvel.CompiledExpression.getValue(CompiledExpression.java:108)
[testng] at org.mvel.MVEL.executeExpression(MVEL.java:230)
[testng] at
org.drools.base.mvel.MVELConsequence.evaluate(MVELConsequence.java:47)
[testng] at
org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:550)
[testng] at
org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:514)
[testng] at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:462)
[testng] at
org.drools.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:424)
This is how I did it:
Java file:
public void run(){
Double allowance = new Double(0);
workingMemory.setGlobal("allowance", allowance);
workingMemory.fireAllRules();
}
Rules:
global Double allowance
dialect "mvel"
rule "Has Wife"
no-loop
salience 20
when
e: Employee()
income:Income()
eval( e.isWife() )
then
System.out.println("Has Wife");
allowance = allowance + 5000;
end
This works if I use java as the dialect.
Have I missed something?
Thanks in advance,
--
It's not going to be like this forever
Blog: http://joshuajava.wordpress.com/
16 years, 2 months
Using the drools as the backend engine for a service
by Jai Vasanth
Hi,
I am planning on using Drools as the rules engine for a service that I am
building. I am considering instantiating a stateful session for every
request to the service. The RuleBase would be created when the service
starts. Is this the correct way to go about incorporating Drools in a
service ? Is session creation an expensive process and if so are there other
efficient ways of doing so ?
Thanks
Jai
16 years, 2 months
Facing Problem with Working Memory Serialization/DeSerialization
by siddhartha banik
Hi,
I am serializing working memory(WM). But after deserializing that, if I try
to modify the corresponding RuleBase that is not getting reflected.
I mean, after loading the serialized WM even I add a package to the
corresponding RuleBase, new Rules are not getting fired for newly added
facts. Or I remove a package from the corresponding RuleBase, even removed
Rules are getting fired for newly added facts.
So, Once WM is deserialized any chage to the corresponding RuleBase is
failing.
I have attached the test program & test rules.
Thanks
Siddhartha
16 years, 2 months
RuleBase was not updated correctly when use RuleAgent
by Cheng, Ping
Hi,
I am using RuleAgent to load rules from pkg files generated by BRMS.
I have "newInstance=false" in my property file and expect the new rules
will be picked/updated when the pkg files was updated.
I added a new rule in BRMS and I can see RuleAgent picked the updated
pkg file from log. The new rule I just added works fine, but the old
rule looks get screwed.
All rules work fine if I restart my program.
Seems that the RuleAgent did not update all rules correctly, I wonder if
anyone has solution for this?
Thanks.
-Ping
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16 years, 2 months
OR
by Markus Helbig
This is from Drools documentation
Example 6.36. or with binding
pensioner : (or Person( sex == "f", age > 60 )
Person( sex == "m", age > 65 ) )
Explicit binding on each Pattern is also allowed.
(or pensioner : Person( sex == "f", age > 60 )
pensioner : Person( sex == "m", age > 65 ) )
but trying to get this to work resolves in:
[60,8]: unknown:60:8 Unexpected token 'or'[62,8]: unknown:62:8
mismatched token: [@639,2279:2291='Person',<7>,62:8]; expecting type
RIGHT_PAREN[62,81]: unknown:62:81 mismatched token:
[@656,2352:2352=')',<12>,62:81]; expecting type THEN
Any ideas (using Drools 4.0.4)?
Cheers
Markus
16 years, 2 months
Re: [rules-users] Dynamic Rules will not be executed
by Edson Tirelli
Since you are (re)using a stateful session, rules that fired before will
not fire again just because you changed the rulebase.
This is expected behavior.
[]s
Edson
2008/2/5, Michael Katai <mk.others(a)gmx.at>:
>
> Hello!
>
> I've googeled and searched the mailing list archive, but i couldn't solve
> my
> current problem:
> Every time i create a new rule (while runtime) i use:
>
> PackageBuilder builder = new PackageBuilder();
> builder.addPackageFromDrl(source);
> if(builder.hasErrors())
> ...
> Package pkg = builder.getPackage();
> ruleBase.addPackage(pkg);
> session.fireAllRules();
>
> Every time, fireAllRules is executed, only the last, newest rule will
> fired.
> Where is my mistake?
>
> ruleBase (and factspace) is created as
> session = ruleBase.newStatefulSession();
> factspace = new FactSpace(session);
>
> thanks in advance,
> michael
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
--
Edson Tirelli
JBoss Drools Core Development
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com
16 years, 2 months
Dynamic Rules will not be executed
by Michael Katai
Hello!
I've googeled and searched the mailing list archive, but i couldn't solve my
current problem:
Every time i create a new rule (while runtime) i use:
PackageBuilder builder = new PackageBuilder();
builder.addPackageFromDrl(source);
if(builder.hasErrors())
...
Package pkg = builder.getPackage();
ruleBase.addPackage(pkg);
session.fireAllRules();
Every time, fireAllRules is executed, only the last, newest rule will fired.
Where is my mistake?
ruleBase (and factspace) is created as
session = ruleBase.newStatefulSession();
factspace = new FactSpace(session);
thanks in advance,
michael
16 years, 2 months
xslt for converting rule XML from drools 2 to jboss rule 4
by arina he
I was scraping internet for one xslt when I was converting drools 2 to jboss
rule 4, but couldn't find one,
so I rolled up sleeves and created one by myself, put up here in case anyone
need it too.
welcome comments.
Arina.
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.0" xmlns:xsl="
http://www.w3.org/1999/XSL/Transform" xmlns:xs="
http://www.w3.org/2001/XMLSchema" xmlns:fn="
http://www.w3.org/2005/xpath-functions" xmlns:java="
http://drools.org/semantics/java" >
<xsl:output method="xml" version="1.0" indent="yes" omit-xml-declaration=
"yes"/>
<xsl:template match="/">
<package name="com.sample">
<global identifier="doc" type="Document" />
<xsl:apply-templates />
</package>
</xsl:template>
<xsl:template name="javaimport" match="java:import">
<import name="{.}" />
</xsl:template>
<xsl:template name="javaFunction" match="java:functions">
<xsl:if test="contains(.,'public')">
<xsl:call-template name="separate">
<xsl:with-param name="str" select="substring-after(.,'public ')" />
</xsl:call-template>
</xsl:if>
</xsl:template>
<xsl:template name="separate">
<xsl:param name="str" />
<xsl:choose>
<xsl:when test="contains($str,'public')">
<xsl:call-template name="drlFn">
<xsl:with-param name="fnBody" select="substring-before($str,'public')" />
</xsl:call-template>
<xsl:call-template name="separate">
<xsl:with-param name="str" select="substring-after($str,'public ')" />
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:call-template name="drlFn">
<xsl:with-param name="fnBody" select="$str" />
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template name="drlFn">
<xsl:param name="fnBody" />
<function name="{substring-before(substring-after($fnBody,' '),'(')}"
return-type="{substring-before($fnBody,' ')}"> <xsl:if
test="normalize-space(substring-before(substring-after($fnBody,'('
),')' ))!=''">
<xsl:call-template name="params">
<xsl:with-param name="paramStr"
select="normalize-space(substring-before(substring-after($fnBody,'('
),')' ))" />
</xsl:call-template>
</xsl:if>
<body>
<xsl:call-template name="bdy">
<xsl:with-param name="bdyStr" select="substring-after($fnBody,'{' )" />
</xsl:call-template>
</body>
</function>
</xsl:template>
<xsl:template name="bdy">
<xsl:param name="bdyStr"/>
<xsl:value-of select="substring-before($bdyStr,'}')" />
<xsl:if test="contains(substring-after($bdyStr,'}'),'}')">
}
<xsl:call-template name="bdy">
<xsl:with-param name="bdyStr" select="substring-after($bdyStr,'}')" />
</xsl:call-template>
</xsl:if>
</xsl:template>
<xsl:template name="params">
<xsl:param name="paramStr"/>
<xsl:choose>
<xsl:when test="contains($paramStr,',')">
<xsl:call-template name="buildIdentifier">
<xsl:with-param name="tpy" select="substring-before($paramStr,' ')" />
<xsl:with-param name="idt"
select="substring-after(substring-before($paramStr,','),'
')" />
</xsl:call-template>
<xsl:call-template name="params">
<xsl:with-param name="paramStr" select=
"normalize-space(substring-after($paramStr,','))"/>
</xsl:call-template>
</xsl:when>
<xsl:otherwise>
<xsl:call-template name="buildIdentifier">
<xsl:with-param name="tpy" select="substring-before($paramStr,' ')" />
<xsl:with-param name="idt" select="substring-after($paramStr,' ')" />
</xsl:call-template>
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:template name="buildIdentifier">
<xsl:param name="tpy" />
<xsl:param name="idt" />
<parameter identifier="{$idt}" type="{$tpy}" />
</xsl:template>
<xsl:template name="rules" match="rule" >
<rule name="{@name}">
<xsl:if test="java:condition">
<lhs>
<and-constraint-connective>
<xsl:for-each select="java:condition">
<eval><xsl:value-of select="normalize-space(.)" disable-output-escaping="no"
/></eval>
</xsl:for-each>
</and-constraint-connective>
</lhs>
</xsl:if>
<xsl:for-each select="java:consequence">
<rhs>
<xsl:value-of select="." />
</rhs>
</xsl:for-each>
</rule>
</xsl:template>
</xsl:stylesheet>
16 years, 2 months
