[rules-dev] Root-Cause is swallowed

[Michael Neale]

yes, or nest the underlying exception ? - just checked in that change.

Some of that code probably pre-dates java 5 where nesting exceptions
became possible and common (from memory).

Thanks for the tip.

Michael.

On Wed, Sep 2, 2009 at 3:11 AM, Bernd Rücker<bernd.ruecker at camunda.com> wrote:
> Hey guys,
>
> just stumbled over this code, it swallowes the root exception (which was
> some Classloading issue). Would be much better to throw it as root cause,
> so the developer can get a clue what's wrong...
>
> Or file a JIRA for it?
>
> Cheers
> Bernd
>
> -----Ursprüngliche Nachricht-----
>
> +    private static void loadProvider() {
> +        try {
> +            // we didn't find anything in properties so lets try and us
> reflection
> +            Class<DecisionTableProvider> cls = (
> Class<DecisionTableProvider> ) Class.forName(
> "org.drools.decisiontable.DecisionTableProviderImpl" );
> +            setDecisionTableProvider( cls.newInstance() );
> +        } catch ( Exception e2 ) {
> +            throw new ProviderInitializationException( "Provider
> org.drools.decisiontable.DecisionTableProviderImpl could not be set." );
> +        }
>
>
> [DEBUG] Trace
> org.drools.ProviderInitializationException: Provider
> org.drools.decisiontable.DecisionTableProviderImpl could not be set.
>        at
> org.drools.compiler.DecisionTableFactory.loadProvider(DecisionTableFactory
> .java:36)
>        at
> org.drools.compiler.DecisionTableFactory.getDecisionTableProvider(Decision
> TableFactory.java:25)
>        at
> org.drools.compiler.DecisionTableFactory.loadFromInputStream(DecisionTable
> Factory.java:16)
>        at
> org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.jav
> a:485)
>        at
> org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java
> :36)
>        at
> com.oneandone.maven.plugins.CreateRulesPackageMojo.createDroolsPackage(Cre
> ateRulesPackageMojo.java:130)
>        at
> com.oneandone.maven.plugins.CreateRulesPackageMojo.execute(CreateRulesPack
> ageMojo.java:75)
>        at
> org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginMana
> ger.java:451)
>        at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLi
> fecycleExecutor.java:558)
>        at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeStandaloneGoal(
> DefaultLifecycleExecutor.java:512)
>        at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLif
> ecycleExecutor.java:482)
>        at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFa
> ilures(DefaultLifecycleExecutor.java:330)
>        at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(De
> faultLifecycleExecutor.java:227)
>        at
> org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecyc
> leExecutor.java:142)
>        at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:336)
>        at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:129)
>        at org.apache.maven.cli.MavenCli.main(MavenCli.java:287)
>        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>        at
> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:
> 39)
>        at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorIm
> pl.java:25)
>        at java.lang.reflect.Method.invoke(Method.java:597)
>        at
> org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
>        at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
>        at
> org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
>        at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
>
>
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>



-- 
Michael D Neale
home: www.michaelneale.net
blog: michaelneale.blogspot.com