Re: [rules-users] Drools Guvnor Issues : Default Constructors & Declaring Dialects
Guvnor sets the default dialect to MVEL, so to use Java you need to
reset it like you did.
Toni Rikkola
Esteban Aliverti wrote:
> Hi,
>
> I think that the non-args constructor is required because the classes
> are instantiated using reflection: Class.forName("...").newInstance();
>
> Best,
>
>
>
> Esteban Aliverti
> - Developer @ http://www.plugtree.com
> - Blog @ http://ilesteban.wordpress.com
>
>
> On Tue, Jul 13, 2010 at 9:01 PM, soc.frangis > wrote:
>
>
> I have successfully converted a previous rules engine project to
> Drools and
> was attempting to make the next step by trying out Guvnor for the
> QA/Testing
> module.
>
> 1)Even though my program executed and ran perfectly in Eclipse, i
> noticed
> the testing QA section of Guvnor would crash with my fact models
> because i
> did not have a default constructor with no arguments. I made the
> change, but
> is this something that is required for Guvnor QA to work properly
> (all fact
> models / POJOs MUST have a default no-arg constructor) OR did i just
> configure Guvnor wrong?
>
> I basically solved my problem, just trying to learn why there was
> a problem
> to begin with.
>
> 2) Also, I noticed that even though the default dialect is java
> (and not
> specifying it does not cause any issues in Eclipse), the Guvnor QA
> section
> would not understand the rules unless they explicitly have dialect
> "java" in
> their signature. Of course adding it fixes the problem, but again I am
> trying to learn why. I assumed since it is the default dialect
> that it would
> not need to be stated. Is this again just the way Guvnor works
> (doesn't
> work) or do i need to configure it a certain way?
> --
> View this message in context:
>
> http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Guvnor-Issues-Default-Constructors-Declaring-Dialects-tp965078p965078.html
> Sent from the Drools - User mailing list archive at Nabble.com.
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>
>
>
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Re: [rules-users] Drools Guvnor Issues : Default Constructors & Declaring Dialects
Hi,
I think that the non-args constructor is required because the classes are
instantiated using reflection: Class.forName("...").newInstance();
Best,
Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com
On Tue, Jul 13, 2010 at 9:01 PM, soc.frangis wrote:
>
> I have successfully converted a previous rules engine project to Drools and
> was attempting to make the next step by trying out Guvnor for the
> QA/Testing
> module.
>
> 1)Even though my program executed and ran perfectly in Eclipse, i noticed
> the testing QA section of Guvnor would crash with my fact models because i
> did not have a default constructor with no arguments. I made the change,
> but
> is this something that is required for Guvnor QA to work properly (all fact
> models / POJOs MUST have a default no-arg constructor) OR did i just
> configure Guvnor wrong?
>
> I basically solved my problem, just trying to learn why there was a problem
> to begin with.
>
> 2) Also, I noticed that even though the default dialect is java (and not
> specifying it does not cause any issues in Eclipse), the Guvnor QA section
> would not understand the rules unless they explicitly have dialect "java"
> in
> their signature. Of course adding it fixes the problem, but again I am
> trying to learn why. I assumed since it is the default dialect that it
> would
> not need to be stated. Is this again just the way Guvnor works (doesn't
> work) or do i need to configure it a certain way?
> --
> View this message in context:
> http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Guvnor-Issues-Default-Constructors-Declaring-Dialects-tp965078p965078.html
> Sent from the Drools - User mailing list archive at Nabble.com.
> ___
> rules-users mailing list
> rules-users@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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[rules-users] Drools Guvnor Issues : Default Constructors & Declaring Dialects
I have successfully converted a previous rules engine project to Drools and was attempting to make the next step by trying out Guvnor for the QA/Testing module. 1)Even though my program executed and ran perfectly in Eclipse, i noticed the testing QA section of Guvnor would crash with my fact models because i did not have a default constructor with no arguments. I made the change, but is this something that is required for Guvnor QA to work properly (all fact models / POJOs MUST have a default no-arg constructor) OR did i just configure Guvnor wrong? I basically solved my problem, just trying to learn why there was a problem to begin with. 2) Also, I noticed that even though the default dialect is java (and not specifying it does not cause any issues in Eclipse), the Guvnor QA section would not understand the rules unless they explicitly have dialect "java" in their signature. Of course adding it fixes the problem, but again I am trying to learn why. I assumed since it is the default dialect that it would not need to be stated. Is this again just the way Guvnor works (doesn't work) or do i need to configure it a certain way? -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Drools-Guvnor-Issues-Default-Constructors-Declaring-Dialects-tp965078p965078.html Sent from the Drools - User mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
