RE: Rules with Lookup Tables...
by Rahul Phadnis
Have you looked at
http://labs.jboss.com/portal/jbossrules/subversion.html
I think that page is not uptodate since at the bottom
it says "Trunk is unstable and may often not build. If
you wish to build form Subversion source the latest
tag is:
http://anonsvn.labs.jboss.com/labs/jbossrules/tags/3.0.3-GA/
"
Are n't we at 3.0.5 already?
-Rahul
--- jjdepaul(a)us.ibm.com wrote:
> Rahul -
>
> Where can I find Maven2 repository that has the
> nightly builds for Drools project?! I've looked
> around on a couple of well-known ones abut no luck
> finding anything above D3.0.5
>
> thanks,
> james
> >
> > The "from" CE (conditional expression) is not
> > available in the current released jboss rules
> version
> > (3.0.5) and you probably have to use the nightly
> build
> > to use it.
> >
> > -Rahul
> >
> >
>
>
16 years, 6 months
Re:JUnit testing
by J. Michael Dean
>
Thanks. Sorry for few details as this has been a several message
question. I have created a Drools plugin that contains EITHER the
maximum number of jars and dependencies (i.e. ALL), or the minimum
(i.e. those needed for compiler option only processing DRL files), or
adding the entire Drools distribution to my Java extensions folder in
OS X, and in all instances, I get an error loading dialects. The
enigma for me is that all of these plugin options enable me to make a
stand alone RCP application that works fine.
Here is the test unit code:
@BeforeClass
public static void setUp() throws Exception {
Reader source;
PackageBuilderConfiguration pkgConfig = new
PackageBuilderConfiguration();
JavaDialectConfiguration javaDialectConf =
(JavaDialectConfiguration) pkgConfig.getDialectConfiguration("java");
javaDialectConf.setCompiler(JavaDialectConfiguration.ECLIPSE);
final PackageBuilder builder = new PackageBuilder(pkgConfig);
boolean exists = (new File("rules/GlucoseDroolRules00.drl")).exists();
if (exists) {
builder.addPackageFromDrl(new FileReader(
"rules/GlucoseDroolRules00.drl"));
System.out.println("Found the file!");
} else {
System.out.println("Cannot locate the file - will try as resource");
source = new InputStreamReader(AllDroolsRulesTests.class
.getResourceAsStream("rules/GlucoseDroolRules00.drl"));
builder.addPackageFromDrl(source);
}
if (builder.hasErrors()) {
System.out.println(builder.getErrors().toString());
}
Package pkg = builder.getPackage();
ruleBase = RuleBaseFactory.newRuleBase();
ruleBase.addPackage(pkg);
}
It crashes in the line trying to instantiate the package
configuration. If I eliminate the lines that configure the package,
and invoke the package building without an argument (the default),
then the crash occurs in that line. The crash trace:
org.drools.RuntimeDroolsException: Unable to load dialect
'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java'
at
org
.drools
.compiler
.PackageBuilderConfiguration
.addDialect(PackageBuilderConfiguration.java:152)
at
org
.drools
.compiler
.PackageBuilderConfiguration
.buildDialectConfigurationMap(PackageBuilderConfiguration.java:140)
at
org
.drools
.compiler
.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:117)
at
org
.drools
.compiler
.PackageBuilderConfiguration.<init>(PackageBuilderConfiguration.java:94)
at
droolsRules.tests.AllDroolsRulesTests.setUp(AllDroolsRulesTests.java:40)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun
.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
39)
at
sun
.reflect
.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:
25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
org
.junit
.internal
.runners.BeforeAndAfterRunner.invokeMethod(BeforeAndAfterRunner.java:74)
at
org
.junit
.internal
.runners.BeforeAndAfterRunner.runBefores(BeforeAndAfterRunner.java:50)
at
org
.junit
.internal
.runners.BeforeAndAfterRunner.runProtected(BeforeAndAfterRunner.java:33)
at
org.junit.internal.runners.TestClassRunner.run(TestClassRunner.java:52)
at
org
.eclipse
.jdt
.internal
.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:38)
at
org
.eclipse
.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org
.eclipse
.jdt
.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
460)
at
org
.eclipse
.jdt
.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:
673)
at
org
.eclipse
.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:
386)
at
org
.eclipse
.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:
196)
Caused by: java.lang.NullPointerException
at
org
.drools
.compiler
.PackageBuilderConfiguration
.addDialect(PackageBuilderConfiguration.java:146)
... 18 more
This trace is identical in all instances. I have looked at the source
code and it appears that the Drools code is looking for the drools
configuration file, and I am not sure if this is included in the
classpath when running JUnit. However, the minimal and maximal plugin
configurations make an RCP run perfectly as a standalone application.
This is Eclipse 3.3 fall version, Mac OXX Leopard (but have run on
Tiger and same error, so not a new Apple bug), Drools 4.03, and JUnit 4.
Thanks.
> ------------------------------
>
> Message: 8
> Date: Tue, 4 Dec 2007 06:50:15 -0800 (PST)
> From: "John J. Franey" <jjfraney(a)gmail.com>
> Subject: Re: [rules-users] JUnit testing
> To: rules-users(a)lists.jboss.org
> Message-ID: <14151759.post(a)talk.nabble.com>
> Content-Type: text/plain; charset=us-ascii
>
>
>
>
> J Michael Dean wrote:
>>
>> I am having problems figuring out how to do JUnit 4 unit tests with
>> Drools and am wondering what I am missing.
>>
>
> I'm successfully using junit4 to test rules. I build a rules
> package from
> my rules file, create a stateful session, insert facts, fire all
> rules, run
> queries, and finally, perform junit asserts on the results.
>
> I can't tell you what you are missing, unless you say what you have.
>
> Regards,
> John
>
>
> --
> View this message in context: http://www.nabble.com/JUnit-testing-tf4930259.html#a14151759
> Sent from the drools - user mailing list archive at Nabble.com.
>
>
>
> ------------------------------
>
> _______________________________________________
> rules-users mailing list
> rules-users(a)lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
> End of rules-users Digest, Vol 13, Issue 6
> ******************************************
16 years, 7 months
Accessing maps (hashmaps) keys and values in rules
by Ryan, Dennis (Dennis)
We are using Maps (HashMaps) in our rules and the only way we have found
to access keys and values in the Map in the "when" clauses is thru use
on eval() which I know is a big no-no by rules purists. Is there a
better way, maybe some shorthand I'm not familiar with to deal with Maps
in the when clause?
Thanks,
Dennis
16 years, 9 months
How do you use Ruleflows with StatelessSession's?
by Shahad Ahmed
Does anyone know if it's possible to use a ruleflow with a StatelessSession?
The current documentation and API seem to show examples with
StatefullSessions i.e.:
statefullSession.startProcess(id);
statefullSession.fireAllRules();
etc...
However, there doesn't seem to be anything equivalent in the API for
StatelessSesssion's. I'd really like to be able to use the new sequential
mode (i.e. with a StatelessSession) and ruleflow.
Regards,
Shahad
16 years, 9 months
BRMS
by Markus Helbig
Hi,
i tryed to deploy the BRMS on a WebSphere Server, but i get
incompatibility errors. It seems BRMS can not be used with JRE 1.4.x,
right? Why? JRE 1.4.x is still very common and often used in
enterprises ...
Cheers
Markus
Stacktrace is:
Could not be defined due to: (org/jboss/seam/servlet/SeamListener) bad
major version at offset=6
This is often caused by having a class defined at multiple
locations within the classloader hierarchy. Other potential causes
include compiling against an older or newer version of the class
that has an incompatible method signature.
Dumping the current context classloader hierarchy:
==> indicates defining classloader
16 years, 10 months
Can "From" reason over primitive arrays?
by Henry Canterburry
I am trying to pattern match on a primitive array such as String[] or
SomeObject[]. The documentation only mentions collections in the section
about From.
Would a pattern match syntax such as...
rule "My rule"
when
$source : SourceObject()
$myObject : MyObject() from $source.returnsAnArrayProperty
then
....
..be correct? If not, how can capture and loop over every object in an
array (not Collection)?
I have tried the above and I get a ClassCastException.
HC
16 years, 10 months
java.lang.ClassCastException comparing BigDecimals (compareTo)
by José Arrarte
Hello,
First of all, I'd like to thank all the people involved in making this tool
such a great one (this includes whoever writes the reference manual as
well).
I've been having some problems when comparing BigDecimals (using the
compareTo method). I didn't find this issue in any previous post or in
Drools' JIRA. However, I've been using Drools for a short time, so I hope
you people can help me.
The problem:
Firing this (simple) rule:
rule "Test Rule"
when
$dec : java.math.BigDecimal() from java.math.BigDecimal.TEN;
eval( $dec.compareTo(java.math.BigDecimal.ONE) > 0 )
then
System.out.println("OK!");
end
Fires this exception:
org.drools.RuntimeDroolsException: java.lang.ClassCastException:
java.lang.Integer cannot be cast to java.math.BigDecimal
at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:76)
at org.drools.reteoo.EvalConditionNode.assertTuple(EvalConditionNode.java:145)
at org.drools.reteoo.SingleTupleSinkAdapter.propagateAssertTuple(
SingleTupleSinkAdapter.java:20)
at org.drools.reteoo.FromNode.assertTuple(FromNode.java:90)
at org.drools.reteoo.SingleTupleSinkAdapter.createAndPropagateAssertTuple(
SingleTupleSinkAdapter.java:55)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(
LeftInputAdapterNode.java:116)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(
SingleObjectSinkAdapter.java:22)
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:153)
at org.drools.reteoo.Rete.assertObject(Rete.java:175)
at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java:192)
at
org.drools.reteoo.ReteooWorkingMemory$WorkingMemoryReteAssertAction.execute(
ReteooWorkingMemory.java:179)
at org.drools.common.AbstractWorkingMemory.executeQueuedActions(
AbstractWorkingMemory.java:1315)
at org.drools.common.AbstractWorkingMemory.fireAllRules(
AbstractWorkingMemory.java:462)
at org.drools.common.AbstractWorkingMemory.fireAllRules(
AbstractWorkingMemory.java:433)
at com.sample.DroolsTest.main(DroolsTest.java:33)
Caused by: java.lang.ClassCastException: java.lang.Integer cannot be cast to
java.math.BigDecimal
at com.sample.Rule_Test_Rule_0Eval0Invoker.evaluate(Rule_Test_Rule_0Eval0Invoker.java:12)
at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:72)
... 14 more
I've reported the issue in JIRA (
http://jira.jboss.com/jira/browse/JBRULES-1433)
Best regards,
José
16 years, 10 months
Grouping rules
by Jai Vasanth
Hi,
I am building a system where I would need to fire different sets of rules
based on some attribute in the fact object.
Here are someways which I thought of, I was wondering if there was something
better than that.
1) I could do this by creating different sessions based on the data attrbute
(different sessions would have different rule packages based on the
attribute)
or
2) Have all the rules fire (all the different sets of rules) irrespective of
the attribute and have them insert fact new objects into the working memory.
In the second round of rules, collect the (newly made) fact objects based
on the attribute and take that action.
Thanks
Jai
16 years, 10 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, 10 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, 10 months
