[rules-dev] Drools running in Google App Engine - list of changes made to code

[Mauricio Salatino]

That sounds really nice!
Can you mention the features that you get working? which are left out?


On Mon, Jan 17, 2011 at 4:32 PM, Mark Proctor <mproctor at codehaus.org> wrote:

>  On 17/01/2011 19:25, Paul Browne wrote:
>
> Folks,
>
> A little bit later than expected (!) I've managed to get Drools running
> within Google App Engine.
>
> I thought App Engine wouldn't work with runtime generated bytecode and had
> classloader restrictions?
>
> Mark
>
>
> A list of the changes that I made to the Drools Core and Drools Util code
> are below. A lot of these changes are NullPointer checks when reading
> properties from a file (i.e. things that you might want in the codebase
> anyway).
>
> Notes on the sample I used to try this out are at
> http://code.google.com/p/red-piranha/wiki/ModifyDroolsRunInGoogleAppEngine
> The sample (for the moment) is running a pre-built KnowledgeBase within GAE
> (i.e. no rule compilation, nor any of the advanced features).
>
> What is the best way of submitting the actual code changes for review and
> possible inclusion as part of the Drools source code?
>
> A patch against trunk attached to a jira should suffice, don't forget we've
> moved to GIT.
>
> Mark
>
>
> Thanks
>
> Paul
>
> * Drools Core *
>
>  AbstractRuleBase.java // line 265 surrounded by try / catch
>
>       this.config = (RuleBaseConfiguration) droolsStream.readObject();
>
>  RuleBaseConfiguration.java // - line 985 surround by try / catch
>
>          this.classLoader = ClassLoaderUtil.getClassLoader
>
>  RuleBaseConfiguration.java // line 395  surround by try / catch
>
>      this.chainedProperties = new ChainedProperties( "rulebase.conf",
>
>  RuleBaseConfiguration.java // line 457 surround by try / catch, default Conflict Resolver
>
>           setConflictResolver( determineConflictResolver( this.chainedProperties.getProperty( "drools.conflictResolver",
>
>  * Drools Util *
>
>  ChainedProperties.java // line 98 - exception check around ClassLoader.getSystemClassLoader();
>
>  ChainedProperties.java // line 125 - exception check around ClassLoader.getSystemClassLoader();
>
>  ChainedProperties.java // line 160
>         - null check for properties /key and return default
>
>  ChainedProperties.java // line 240 - surround by try / catch for securityaccessexception
>
>     if ( file != null && file.exists() ) {
>
>  ChainedProperties.java // line 270 - surround by try / catch for securityaccessexception
>
>     if ( file != null && file.exists() ) {
>
>  ClassFieldInspector.java // line 166 -
>          return "/" + clazz.getCanonicalName() + ".class";
>
>  ClassLoaderUtil.java // line 25 - surround by try / catch for securityaccessexception
>
>      ClassLoader systemClassLoader =
>
>
>
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 - Salatino "Salaboy" Mauricio -
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