2:05 p.m.
I'm upgrading to Drools 5.4 from Drools 5.0.1. When I try to compile the
.drl files into a .pkg I'm getting a couple of strange errors. Hoping
someone can help.
Here is the .drl
rule "Rule 1 - Testing"
no-loop true
when
$orderInfo : OrderingInfo (orderedProducts != null)
then
Customer customer = $orderInfo.getCustomer();
ArrayList<ProductAttribute> productAttributes =
$orderInfo.getAttributes();
String localCode = getCode();
end
function String getCode (Customer customer) {
return customer.getCode();
}
I get an error when I try to compile saying the following:
Unable to resolve type ArrayList<ProductAttribute>
If I remove the line and just use ArrayList and leave off the
"<ProductAttribute>" component, it works.
Any help is appreciated.
It also cannot access the getCode() function.
I'm not sure why that is the case.
Finally, I can get all of these things to work when I run the rules using
the .DRL files. Typically we compile them into packages prior to
deployment.
Thank you again in advance for any/all of your help.
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2:18 p.m.
See below.
On 21 August 2012 21:05, dxande6 <dxande6(a)qwest.com> wrote:
I'm upgrading to Drools 5.4 from Drools 5.0.1. When I try to
compile the
.drl files into a .pkg I'm getting a couple of strange errors. Hoping
someone can help.
Here is the .drl
rule "Rule 1 - Testing"
no-loop true
when
$orderInfo : OrderingInfo (orderedProducts != null)
then
Customer customer = $orderInfo.getCustomer();
ArrayList<ProductAttribute> productAttributes =
$orderInfo.getAttributes();
String localCode = getCode();
end
function String getCode (Customer customer) {
return customer.getCode();
}
I get an error when I try to compile saying the following:
Unable to resolve type ArrayList<ProductAttribute>
If I remove the line and just use ArrayList and leave off the
"<ProductAttribute>" component, it works.
Any help is appreciated.
The DRL parser does not recognize generics. Omit "<...>".
It also cannot access the getCode() function.
I'm not sure why that is the case.
The function getCode() requires an argument. And (I think) its definition
should precede its references.
Finally, I can get all of these things to work when I run the rules using
the .DRL files. Typically we compile them into packages prior to
deployment.
Not sure what you mean here. If it doesn't compile, you can't "run" it.
-W
Thank you again in advance for any/all of your help.
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2:53 p.m.
I cleaned up this rule and method quite a bit as an example…..the
getCode(customer), is passing the argument but I still get the same message.
Unable to Analyse Expression getCode(customer):
[Error: unable to resolve method using strict-mode:
….getCode(java.lang.Object)
I tried moving the function to the top of the file and ended up with the
same result.
I’m trying to compile these rules into a pkg file using ANT. Otherwise, I
can run the rules using the .DRL files and everything works fine.
Configuring the build.xml is proving to be a bit more of a task than
originally thought.
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3:38 p.m.
My shop is still on 5.2.0.Final, but FWIW I did get build.xml working to
compile rules files (in my case it was for decision tables). I remember it
took a while to get all the classpaths correct. Below is a snippet from my
build.xml; of course your jars will be different. Also, I don't know if the
Drools ant task has been changed for 5.4. But maybe you can get some ideas
from this:
<target name="-pre-dist">
<property name="droolsPath" value="${build.web.dir}/WEB-INF/lib"
/>
<path id="drools.classpath" >
<pathelement location="${droolsPath}/drools-ant-5.2.0.Final.jar" />
<pathelement location="${droolsPath}/knowledge-api-5.2.0.Final.jar" />
<pathelement location="${droolsPath}/drools-core-5.2.0.Final.jar" />
<pathelement location="${droolsPath}/drools-compiler-5.2.0.Final.jar"
/>
<pathelement
location="${droolsPath}/drools-decisiontables-5.2.0.Final.jar" />
<pathelement location="${droolsPath}/drools-templates-5.2.0.Final.jar"
/>
<pathelement location="${droolsPath}/antlr-2.7.7.jar" />
<pathelement location="${droolsPath}/antlr-3.3.jar" />
<pathelement location="${droolsPath}/antlr-runtime-3.3.jar" />
<pathelement location="${droolsPath}/ecj-3.5.1.jar" />
<pathelement location="${droolsPath}/jxl-2.6.10.jar" />
<pathelement location="${droolsPath}/mvel2-2.1.Beta6.jar" />
</path>
<taskdef name="compiler"
classname="com.abclegal.rules.utility.DroolsCompilerAntTask"
classpathref="drools.classpath"/>
<path id="model.classpath" >
<pathelement location="${build.web.dir}/WEB-INF/lib/abc-domain.jar" />
<pathelement location="${build.web.dir}/WEB-INF/lib/abc-service-api.jar"
/>
<pathelement
location="${build.web.dir}/WEB-INF/lib/commons-logging-1.1.1.jar" />
<pathelement
location="${build.web.dir}/WEB-INF/lib/commons-collections-3.2.1.jar" />
</path>
<echo>Compiling rules spreadsheets to binary package file</echo>
<compiler srcdir="${build.web.dir}/packages/venue"
tofile="${build.web.dir}/packages/venue.pkg"
binformat="package" bintype="knowledge"
classpathref="model.classpath">
<include name="*.xls" />
</compiler>
</target>
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5:35 p.m.
lhorton, thank you very much for the ant help. Unfortunately, I've
implemented the exact same thing and still seem to be getting the same
results.
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11:02 p.m.
The error message seems to indicate that the compiler fails to recognize the
type of the argument "customer". Try adding a cast to the type of the
argument
as given in the function declaration. -
Although, I don't see how this can happen, given that your first posting
accurately reflects the code. Can you provide a complete DRL to reproduce
this error?
-W
On 21 August 2012 21:53, dxande6 <dxande6(a)qwest.com> wrote:
I cleaned up this rule and method quite a bit as an example…..the
getCode(customer), is passing the argument but I still get the same
message.
Unable to Analyse Expression getCode(customer):
[Error: unable to resolve method using strict-mode:
….getCode(java.lang.Object)
I tried moving the function to the top of the file and ended up with the
same result.
I’m trying to compile these rules into a pkg file using ANT. Otherwise, I
can run the rules using the .DRL files and everything works fine.
Configuring the build.xml is proving to be a bit more of a task than
originally thought.
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5:34 p.m.
Is there any reason the function wouldn't work?
I've removed the generics to get around that issue for now, but I still get
an error in relation to calling the function.
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5:42 p.m.
As for the function, there's a minor known bug. The packagebuilder is
sequential and will need
the function to be defined before the rule that uses it.
(Please open a JIRA if you think this is problematic)
Davide
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7 comments
4 participants
participants (4)
-
Davide Sottara -
dxande6 -
lhorton -
Wolfgang Laun