On Tue, May 20, 2008 at 2:34 AM, Mike Dean <
mdean77@comcast.net> wrote:
>
> Sorry to ask question and then figure it out! I just substituted the actual
> name of my suite class instead of saying this.class and it works
> beautifully. I am now testing Drools with JUnit 4 with no problems, after
> nearly six months! THANK YOU.
>
> - Mike
>
> Mike Dean wrote:
>>
>> Thanks to both of you for pursuing this problem. I have worked around it
>> by putting my business classes and rules in a separate Drools project,
>> testing everything there, and then copying them to my RCP. I look forward
>> to a better solution!
>>
>> I must confess Java ignorance, but I use a test suite and try to
>> instantiate the engine once and then run a series of tests. My crash
>> occurs before I get to the individual tests. However, the setUp routine
>> is static, and your code work around cannot be executed in a static
>> context. Where exactly to you put the test for a null classloader?
>>
>> Thanks again. I thought this issue simply died.
>>
>>
>> Marcus Ilgner wrote:
>>>
>>> Hi Edson,
>>>
>>> thank you very much for testing this! Since I could not discern any
>>> differences between your approach and mine, I decided to resolve the
>>> issue manually by inserting a work-around in my test routine which
>>> sets the context class loader for the current thread before calling
>>> the method under test.
>>>
>>> if (Thread.currentThread().getContextClassLoader() == null) {
>>>
>>> Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader());
>>> }
>>>
>>> My guess is that the custom JUnit 4 class runner
>>> (SpringJUnit4ClassRunner) somehow is responsible for the faulty
>>> behaviour.
>>>
>>> Thanks again
>>> Marcus
>>>
>>>
>>> On Mon, May 19, 2008 at 3:09 PM, Edson Tirelli <
tirelli@post.com> wrote:
>>>>
>>>> All,
>>>>
>>>> I see that the code in that spot is weak and could be improved.
>>>> Although,
>>>> using drools 4.0.7, I successfully created a junit 4 test that I paste
>>>> bellow. Also, the whole drools code is tested with junit 3 and we have
>>>> no
>>>> problems. For instance, look at our integration tests here:
>>>>
>>>>
http://anonsvn.labs.jboss.com/labs/jbossrules/branches/4.0.x/drools-compiler/src/test/java/org/drools/integrationtests/
>>>>
>>>> The code I used to create the junit 4 test is based on the default
>>>> example create by the drools plugin + the snippet you showed bellow:
>>>>
>>>> @Test
>>>> public void testRuleBase() {
>>>> try {
>>>>
>>>> //load up the rulebase
>>>> RuleBase ruleBase = readRule();
>>>> StatefulSession workingMemory =
>>>> ruleBase.newStatefulSession();
>>>>
>>>> //go !
>>>> Message message = new Message();
>>>> message.setMessage( "Hello World" );
>>>> message.setStatus( Message.HELLO );
>>>> workingMemory.insert( message );
>>>> workingMemory.fireAllRules();
>>>> workingMemory.dispose();
>>>>
>>>> } catch (Throwable t) {
>>>> t.printStackTrace();
>>>> Assert.fail("Something is wrong: "+t.getMessage());
>>>> }
>>>> }
>>>>
>>>> /**
>>>> * Please note that this is the "low level" rule assembly API.
>>>> */
>>>> private RuleBase readRule() throws Exception {
>>>> //read in the source
>>>> Reader source = new InputStreamReader(
>>>> DroolsTest.class.getResourceAsStream( "/Sample.drl" ) );
>>>>
>>>> PackageBuilderConfiguration conf = new
>>>> PackageBuilderConfiguration();
>>>> JavaDialectConfiguration javaConf = (JavaDialectConfiguration)
>>>> conf.getDialectConfiguration("java");
>>>> javaConf.setCompiler(JavaDialectConfiguration.ECLIPSE);
>>>> javaConf.setJavaLanguageLevel("1.5");
>>>>
>>>> PackageBuilder builder = new PackageBuilder( conf );
>>>> builder.addPackageFromDrl( source );
>>>>
>>>> RuleBase ruleBase = RuleBaseFactory.newRuleBase();
>>>> ruleBase.addPackage( builder.getPackage() );
>>>> return ruleBase;
>>>> }
>>>>
>>>> Hope it helps,
>>>> Edson
>>>>
>>>>
>>>> 2008/5/19 Marcus Ilgner <
marcus.ilgner@gmail.com>:
>>>>>
>>>>> Hi list,
>>>>>
>>>>> I'm reviving this thread because I happen to have the same problem.
>>>>>
>>>>> On Sun, Mar 23, 2008 at 7:34 PM, Mike Dean <
mdean77@comcast.net> wrote:
>>>>> >
>>>>> > Thanks (months later!). I have cut down my code example below to
>>>>> show
>>>>> > this
>>>>> > issue more clearly:
>>>>> >
>>>>> >
>>>>> > John J. Franey wrote:
>>>>> >>
>>>>> >> NullPointerException on line 146 means classLoader is null. That
>>>>> is
>>>>> >> odd.
>>>>> >> I have no idea why the code that gets classLoader won't work in
>>>>> >> eclipse's
>>>>> >> junit runtime, but does when run in your eclipse plugin.
>>>>>
>>>>> It seems indeed like during JUnit tests, the context classloader of
>>>>> the thread gets not set (null).
>>>>>
>>>>> The code leading up to the problem is as follows:
>>>>> PackageBuilderConfiguration conf = new PackageBuilderConfiguration();
>>>>> JavaDialectConfiguration javaConf = (JavaDialectConfiguration)
>>>>> conf.getDialectConfiguration("java");
>>>>> javaConf.setCompiler(JavaDialectConfiguration.ECLIPSE);
>>>>> javaConf.setJavaLanguageLevel("1.5");
>>>>> RuleBase ruleBase = RuleBaseFactory.newRuleBase();
>>>>>
>>>>> The resulting stacktrace is:
>>>>> java.lang.NullPointerException
>>>>> at
>>>>> org.drools.RuleBaseConfiguration.instantiateClass(RuleBaseConfiguration.java:569)
>>>>> at
>>>>> org.drools.RuleBaseConfiguration.determineConsequenceExceptionHandler(RuleBaseConfiguration.java:561)
>>>>> at
>>>>> org.drools.RuleBaseConfiguration.init(RuleBaseConfiguration.java:220)
>>>>> at
>>>>> org.drools.RuleBaseConfiguration.<init>(RuleBaseConfiguration.java:133)
>>>>> at
>>>>> org.drools.common.AbstractRuleBase.<init>(AbstractRuleBase.java:147)
>>>>> at
>>>>> org.drools.reteoo.ReteooRuleBase.<init>(ReteooRuleBase.java:124)
>>>>> at
>>>>> org.drools.reteoo.ReteooRuleBase.<init>(ReteooRuleBase.java:101)
>>>>> at
>>>>> org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:57)
>>>>> at
>>>>> org.drools.RuleBaseFactory.newRuleBase(RuleBaseFactory.java:38)
>>>>>
>>>>> Has anyone set up Drools and JUnit successfully? Maybe we forgot to
>>>>> set up the environment properly?
>>>>>
>>>>> Best regards
>>>>> Marcus
>>> _______________________________________________
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>>>
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>>>
https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>>
>>
>>
>
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