[rules-users] unable to resolve method using strict-mode
Vladimir Perlov
vladperl at hotmail.com
Mon Oct 5 12:45:09 EDT 2009
try this:
System.setProperty("drools.dialect.mvel.strict", "false");
it works for me :)
> Date: Mon, 5 Oct 2009 00:08:48 -0700
> From: cdelgado70 at gmail.com
> To: rules-users at lists.jboss.org
> Subject: Re: [rules-users] unable to resolve method using strict-mode
>
>
> Hi all,
>
> I am getting the same problem reported by vladperl. I've got rules and
> rulesflows using MVEL2 scripts that work fine in Windows running in JBoss
> and junit tests. I've inserted a map into StatefulKnowledgeSession and I am
> successfully invoking myMap.myObject.myValue without any casting. However I
> am now deploying the application in RedHat with Websphere 7 and I am getting
> everywhere errors like:
> unqualified type in strict mode for: myObject
> unqualified type in strict mode for: myValue
> unable to resolve method using strict-mode:
> java.lang.Object.get(java.lang.String)]
>
> It seems that somehow the MVEL's Strong Typing Mode has been setup in this
> env. This doesn't make sense to me. I rather prefer to believe the error is
> misleading and something else is bothering MVEL when parsing my rules and
> ruleflow files.
>
> Any help will be much appreciated!
>
>
>
> vladperl wrote:
> >
> >
> > Hi Wolfgang,
> > Please take a look at attached new example.
> > This time the example can demonstrate when strict mode is false we don't
> > have to put class cast.
> > Beside I finally figured out how to switch strict mode for MVEL dialect.
> >
> > Best regards,
> > Vladimir
> >
> > Date: Sat, 3 Oct 2009 14:36:10 +0200
> > From: wolfgang.laun at gmail.com
> > To: rules-users at lists.jboss.org
> > Subject: Re: [rules-users] unable to resolve method using strict-mode
> >
> > The Java code in the archive just compiles a .drl file, and there's no
> > reason this should fail. The class cast would only appear to be missing
> > after a Map object is inserted into WM, and the session is run so that the
> > rule fires.
> >
> > -W
> >
> > 2009/10/2 Vladimir Perlov <vladperl at hotmail.com>
> >
> >
> >
> >
> >
> >
> > It's compiled and working on Windows without any casting :)
> > Check out the test project I attached.
> > You will see that the rule will compile from web application (Windows
> > only) or with Java SE application. The web application using JSF so in
> > case to run it use application server with included JSF library.
> >
> >
> > http://download.java.net/glassfish/v3/promoted/
> >
> >
> > Date: Fri, 2 Oct 2009 19:48:17 +0200
> > From: wolfgang.laun at gmail.com
> >
> > To: rules-users at lists.jboss.org
> > Subject: Re: [rules-users] unable to resolve method using strict-mode
> >
> > Map() in the .drl file is bound to be interpreted as Map<Object,Object> so
> > that a Map.get() returns an Object. To be able to call method
> > getSomeMethod() you'd have to cast this result, according to
> >
> >
> > ((SomeClass)$map.get("x")).getSomeMethod()
> >
> >
> > I fail to understand how this could ever be avoided - strict or no strict,
> > MVEL or not MVEL.
> >
> > -W
> >
> > 2009/10/2 Vladimir Perlov <vladperl at hotmail.com>
> >
> >
> >
> >
> >
> >
> >
> > Hi Wolfgang,
> > Thank you very much for quick response!
> >
> > I tried your suggestion and still getting the following error:
> >
> > Unable to build expression for 'consequence': Failed to compile: 1
> > compilation error(s): - (1,29) unable to resolve method using
> > strict-mode: java.lang.Object.getSomeMethod() '
> > System.out.println($map.get("x").getSomeMethod());
> > ' : [Rule name='TEST']
> > At least now I have only 1 compilation error comparing to the previous
> > variant.
> >
> > modified rule:
> >
> > rule "TEST"
> >
> >
> > dialect "mvel"
> > when
> > $map : Map()
> >
> >
> > then
> > System.out.println($map.get("x").getSomeMethod());
> > end
> >
> >
> >
> > I believe that problem is related to strict-mode that somehow enforced on
> > Linux but not on Windows.
> > I tried to remove the strict mode using the the following approach but it
> > seems don't have any effect.
> > We have web application with many drools rules and it's working on Windows
> > but when we deployed the same application to Linux we are getting failed
> > compile errors ;)
> >
> >
> >
> > KnowledgeBuilderConfiguration config =
> > KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration();
> > config.setProperty("drools.dialect.mvel.strict", "false");
> >
> >
> > kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(config);
> >
> > Please advise me.
> >
> > By the way I'm using drools 5.0.1
> >
> >
> > Date: Fri, 2 Oct 2009 18:30:25 +0200
> >
> >
> > From: wolfgang.laun at gmail.com
> > To: rules-users at lists.jboss.org
> > Subject: Re: [rules-users] unable to resolve method using strict-mode
> >
> >
> >
> > 2009/10/2 Vladimir Perlov <vladperl at hotmail.com>
> >
> >
> >
> >
> >
> >
> >
> >
> > Here is the rule that failed to compile on Linux:
> >
> > rule "TEST"
> > dialect "mvel"
> > Send
> > when
> > map : Map()
> >
> > $map : Map()
> >
> > or omit '$' in the consequence.
> > -W
> >
> > then
> > System.out.println($map.get("x").getSomeMethod());
> > end
> >
> >
> >
> > Lauren found her dream laptop. Find the PC that’s right for you.
> >
> >
> >
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> >
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> >
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> >
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> >
> >
> >
> >
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