[rules-dev] Drools on android -reply

[Esteban Aliverti]

Just out of curiosity, did you try adding a binary package instead of a DRL?

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Esteban Aliverti
- Developer @ http://www.plugtree.com
- Blog @ http://ilesteban.wordpress.com


On Mon, Jan 2, 2012 at 2:30 PM, Matthew Versaggi <profversaggi at gmail.com>wrote:

> Here's what I got working and when it failed .... it was just the basic
> 'hello world' kind of stuff:
>
> Worked:
> final KnowledgeBuilder kbuilder =
> KnowledgeBuilderFactory.newKnowledgeBuilder();
>
> Died:
> // this will parse and compile in one step
> kbuilder.add(ResourceFactory.newClassPathResource("HelloWorld.drl",
> DroolsTest.class), ResourceType.DRL);
>
> LogCat:
> 01-02 13:13:17.684: E/AndroidRuntime(537): java.lang.RuntimeException:
> Unable to start activity
> ComponentInfo{com.versaggi.android.droolsandroidtest/com.versaggi.android.droolsandroidtest.DroolsAndroidTestActivity}:
> java.lang.NullPointerException
>
> That's about as far as I could get.
>
> I think this DOC will probably help out ....
>
> https://github.com/cgreenhalgh/droolstest/blob/8ea1a06d9b1b38a40b1add7f988ebbf9f4ff3e88/docs/drools-on-android.html..
> ..
>
> I had to re-compile the CompositeClassLoader.java file and then reinsert
> it into the drools-api-5.1.0.M2.jar file to get past this issue:
>
> "A small modification is needed in org.drools.util.CompositeClassLoader.
> Apparently, the Android JVM doesn't allow null as the parent classloader
> so I changed that to super(CompositeClassLoader.class.getClassLoader())in the constructor, and that works fine."
>
> However I think that his other modifications aren't completely integrated
> into the drools-compiler-5.1.0.M2.jar or the drools-core jar files he
> provides just yet.
>
> *********************************
>
>
>
> On Mon, Jan 2, 2012 at 2:11 PM, Wolfgang Laun <wolfgang.laun at gmail.com>wrote:
>
>>
>>
>> On 2 January 2012 13:58, profversaggi <profversaggi at gmail.com> wrote:
>>
>>> I've run across the work of a very bright man in the UK who did it as
>>> part of
>>> an integrated systems he was working on ... and I got his code working
>>> up to
>>> the point where it died loading the DRL rules.
>>>
>>
>> His rules? Your rules? Did you try the simple "Hello World" rule?
>>
>> rule HW
>> when
>> then
>>     System.out.println( "Hello world" );
>> end
>>
>> -W
>>
>>
>>> I think this might shed some light on things but it's fast getting into
>>> true
>>> software engineering and I'm just not there yet ....
>>>
>>> Here is his codebase:
>>> https://github.com/cgreenhalgh/droolstest
>>>
>>>
>>> --
>>> View this message in context:
>>> http://drools.46999.n3.nabble.com/Drools-on-android-tp723184p3626516.html
>>> Sent from the Drools: Developer (committer) mailing list mailing list
>>> archive at Nabble.com.
>>> _______________________________________________
>>> rules-dev mailing list
>>> rules-dev at lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-dev
>>>
>>
>>
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>>
>
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